Hack The Sec-Leading Resource Of Linux Tutorial: Linux

How to Monitor Server Logs in Real-Time with "Log.io"

<div dir="ltr" style="text-align: left;" trbidi="on">
<span style="background-color: white; color: #333333; font-family: "verdana" , "geneva" , sans-serif; font-size: 15px; font-style: normal; font-weight: 400; letter-spacing: normal; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px;"> 
<div style="background-color: white; orphans: 2; text-align: center; text-decoration-color: initial; text-decoration-style: initial; text-indent: 0px; widows: 2;">
Monitor Server Logs in Real-Time with "Log.io"</div>
<div style="background-color: white; orphans: 2; text-align: center; text-decoration-color: initial; text-decoration-style: initial; text-indent: 0px; widows: 2;">
 </div>
Log.io is a small application build on Node.js and Socket.io for monitoring real time Linux server logs through web interface. 
 
On RHEL/CentOS 7 
 
Install Epel repositories using the following command. 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">yum install http://fedora.mirrors.telekom.ro/pub/epel/7/x86_64/e/epel-release-7-2.noarch.rpm</pre>
On RHEL/CentOS 6 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">--------------------- On RHEL/CentOS 6.x - 32 Bit ---------------------
yum install http://fedora.mirrors.telekom.ro/pub/epel/6/i386/epel-release-6-8.noarch.rpm</pre>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">--------------------- On RHEL/CentOS 6.x - 64 Bit ---------------------
yum install http://fedora.mirrors.telekom.ro/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm</pre>
After added the Epel repositories you can do a system upgrade by using following command line. 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">yum update</pre>
Now Install Node.js and NPM 
 
<a href="https://www.hackthesec.co.in/search/label/Node.Js">Node.js</a> is an open-source, cross-platform JavaScript run-time environment that executes <a href="https://www.hackthesec.co.in/search/label/Java">JavaScript </a>code server-side. Historically, JavaScript was used primarily for client-side scripting, in which scripts written in JavaScript are embedded in a webpage's HTML and run client-side by a JavaScript engine in the user's web browser. Node.js lets developers use JavaScript for server-side scripting—running scripts server-side to produce dynamic web page content before the page is sent to the user's web browser. Consequently, Node.js represents a "<a href="https://www.hackthesec.co.in/search/label/Java">JavaScript </a>everywhere" paradigm, unifying web application development around a single programming language, rather than different languages for server side and client side scripts.now install the nodejs using following command line. 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">curl --silent --location https://rpm.nodesource.com/setup_5.x | bash - 
yum install -y nodejs</pre>
Install and Configure Log.io Application 
Log.io application must be installed through NPM by specifying a valid local system user ( example - root) i recommend install this application through root user. now install the application using following command. 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">npm install -g log.io --user "root"</pre>
after the completed installation the application will create a folder which is hidden the folder name is "Log.io" in centos 7 the folder path is below 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">cd /root/.log.io
ls</pre>
after that you will see three file 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">harvester.conf, log_server.conf, web_server.conf  </pre>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiuP1qRoNyiMnsgPnB-Ow6c5I1pgSS7YbymMqLT9Wj7uLnpBPeeEM8TDIfY81JpkCPL2ZaAu-rTcQ576SeX0QmR4eD8Qht30I1bvvCa7ujwrTOm3Kol2z99Ez0ubbbawS7nslknCIE5WL6Y/s1600/Log-io-hackthesec.co.in.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="227" data-original-width="620" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiuP1qRoNyiMnsgPnB-Ow6c5I1pgSS7YbymMqLT9Wj7uLnpBPeeEM8TDIfY81JpkCPL2ZaAu-rTcQ576SeX0QmR4eD8Qht30I1bvvCa7ujwrTOm3Kol2z99Ez0ubbbawS7nslknCIE5WL6Y/s1600/Log-io-hackthesec.co.in.jpg" /></a></div>
 
Now it's time to configure Log.io to monitor local log files in real time. 
 
- The harvester file is for watches the changes in specified local log files declared in its configuration and send new log to the server. - harvester.conf 
 
First open the harvester.conf file, by default you will see have some setting the monitor Apache log  
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">nano harvester.conf</pre>
my harvester.conf file below 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">exports.config = {
 nodeName: "application_server",
 logStreams: {
 apache: [
 "/var/log/httpd/access_log",
 "/var/log/httpd/error_log"
 ],
 SecureLog: [
 "/var/log/secure"
 ],
 MySqlLog: [
 "/var/log/mysqld.log"
 ]
 },
 server: {
 host: '0.0.0.0',
 port: 28777
 }
 }
</pre>
<div>
Note - if you don't want to send the harvester output to a remote Log.io server then open harvester.conf file and replace 0.0.0.0 address with lookback address(127.0.0.1)</div>
<div>
 </div>
<div>
log_server.conf - This configuration is for tell the server on which ip address it should listen.By default it listens on all ip interfaces you can modify the ip address by using the following command </div>
<div>
 </div>
<div>
my log_server.conf file below</div>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">nano log_server.conf</pre>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">exports.config = {
 host: '0.0.0.0',
 port: 28777
}</pre>
web_server.conf - This configuration file is for web interface. by default the web portal is accessible on port 28778(all interface). Also using this file you can increase the security by using HTTP authentication,securing the web interface with SSL, disallow logs from specific ip address and restricting the web interface access to the specific ip.  
 
my web_server.conf file below 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">nano web_server.conf</pre>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;"> exports.config = {
 host: '0.0.0.0',
 port: 28778,

/*
  // Enable HTTP Basic Authentication
  auth: {
    user: "hackthesec",
    pass: "1234346"
  },
  */

/*
  // Enable HTTPS/SSL
  ssl: {
    key: '/path/to/privatekey.pem',
    cert: '/path/to/certificate.pem'
  },
  */

/*
  // Restrict access to websocket (socket.io)
  // Uses socket.io 'origins' syntax
  restrictSocket: '*:*',
  */

/*
  // Restrict access to http server (express)
  restrictHTTP: [
    "192.168.29.39",
    "10.0.*"
  ]
  */

}
</pre>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEja29JCqUHeUn2NHEHOZPAz59BnbBqvH3fk7jLffTc6NfIrsZ2eXbW6k6odmEELRQnzsSYyYHmTCJgLLGpaJvJaVseDE2kx86B840v4Hpx8zI_xT6YAkttZmW3ntQSp1X3-Qn_juaETMJmb/s1600/web_server_hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="638" data-original-width="772" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEja29JCqUHeUn2NHEHOZPAz59BnbBqvH3fk7jLffTc6NfIrsZ2eXbW6k6odmEELRQnzsSYyYHmTCJgLLGpaJvJaVseDE2kx86B840v4Hpx8zI_xT6YAkttZmW3ntQSp1X3-Qn_juaETMJmb/s1600/web_server_hackthesec.co.in.png" /></a></div>
<div>
 </div>
<div>
Allow web interface and socket.io in the firewall for receiving the logs from the harvester.</div>
<div>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">firewall-cmd --add-port=28778/tcp --permanent
firewall-cmd --add-port=28777/tcp --permanent
firewall-cmd --reload</pre>
</div>
<div>
 </div>
Start Log.io Application using following command line  
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">------ First start server in background ----
log.io-server &</pre>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">--- Start log harvester in background -----
log.io-harvester & </pre>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiRldk28y5_z1TiM28OKiNFnAcKxevfA2ntXReBPpbCg6bg4NIXAgA2qujEtdylCIxukUPN72GkGaxgalxkIKU-2UFF9D3p6UKpnmhcQ4D2OrvioPhymeb_WW3ykaQtfrSA-uQyXmzAGIWW/s1600/Start-Log-io_hackthesec.co.in.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="241" data-original-width="447" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiRldk28y5_z1TiM28OKiNFnAcKxevfA2ntXReBPpbCg6bg4NIXAgA2qujEtdylCIxukUPN72GkGaxgalxkIKU-2UFF9D3p6UKpnmhcQ4D2OrvioPhymeb_WW3ykaQtfrSA-uQyXmzAGIWW/s1600/Start-Log-io_hackthesec.co.in.jpg" /></a></div>
 
After the server has been started open your browser and hit enter with your ip and the declared  port 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">example - http://192.168.2.253:28778</pre>
 
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhBdovh_DU52bpmFN5i3ZAgRhx0sHrL3a1TimO9sLlJnCodSv0oAXXg4lhB_kStNf-kJCGmpbgMXHf-Q7KaG8P-ljSgpUteKiK-t6RoFeJa614ZivaHhUJFU8uPxy12Hx2NMCJ3YTwpoBHk/s1600/screen_detail.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="435" data-original-width="960" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhBdovh_DU52bpmFN5i3ZAgRhx0sHrL3a1TimO9sLlJnCodSv0oAXXg4lhB_kStNf-kJCGmpbgMXHf-Q7KaG8P-ljSgpUteKiK-t6RoFeJa614ZivaHhUJFU8uPxy12Hx2NMCJ3YTwpoBHk/s1600/screen_detail.jpg" /></a></div>
 
To stop Log.io application run the following command. 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">pkill node</pre>
Log.io = https://github.com/NarrativeScience/Log.io 
http://logio.org/</div>

How to Monitor Server Logs in Real-Time with "Log.io"

Monitor Server Logs in Real-Time with "Log.io" Log.io is a small application build on Node.js and Socket.io for monitoring r...

How to install Kali Linux on the Windows

<div dir="ltr" style="text-align: left;" trbidi="on">
<div style="text-align: center;">
Kali-Linux On Windows</div>
No, really…this isn't clickbait. For the past few weeks, we’ve been working with the Microsoft WSL team to get Kali Linux introduced into the Microsoft App Store as an official WSL distribution and today we’re happy to <a href="https://blogs.msdn.microsoft.com/commandline/2018/03/05/kali-linux-for-wsl/" style="font-family: verdana, geneva, sans-serif; font-size: 15px;">announce </a>the availability of the "Kali Linux" Windows application. For Windows 10 users, this means you can simply enable WSL, <a href="https://www.microsoft.com/en-us/store/p/kali-linux/9pkr34tncv07" style="font-family: verdana, geneva, sans-serif; font-size: 15px;">search for Kali</a> in the Windows store, and install it with a single click. This is especially exciting news for penetration testers and security professionals who have limited toolsets due to enterprise compliance standards. 
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9xYpiTa8ZfnbBhjjAIX2qo6e8J8vN6eyKuLPIJahICG9MD3BTioT5QLiO0lmreER2-0sfWQOXQP1r8q4D61DUBU4FGK0FUOky-6d6Qdc2qv9TzcVfb6-32Qb54egR3IK-VQtRW41GVdI/s1600/kali-windows-app-2018-hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="284" data-original-width="798" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9xYpiTa8ZfnbBhjjAIX2qo6e8J8vN6eyKuLPIJahICG9MD3BTioT5QLiO0lmreER2-0sfWQOXQP1r8q4D61DUBU4FGK0FUOky-6d6Qdc2qv9TzcVfb6-32Qb54egR3IK-VQtRW41GVdI/s1600/kali-windows-app-2018-hackthesec.co.in.png" /></a></div>
 
While running Kali on Windows has a few drawbacks to running it natively (such as the lack of raw socket support), it does bring in some very interesting possibilities, such as extending your security toolkit to include a whole bunch of command line tools that are present in Kali. We will update our blog with more news and updates regarding the development of this app as it’s released. 
 
We’d like to take this opportunity to thank the WSL team at Microsoft, and specifically @tara_msft and @benhillis for all the assistance and guidance with which this feat would not be possible. We hope you enjoy WSL’d Kali on Windows 10! 
 
 
And now, a quick guide on getting Kali installed from the Microsoft App Store: 
 
Getting Kali Linux Installed on WSL 
 
Here’s a quick description of the setup and installation process. For an easier copy / paste operation, these are the basic steps taken: 
 
 
1. Update your Windows 10 machine. Open an administrative PowerShell window and install the Windows Subsystem with this one-liner. A reboot will be required once finished. 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Windows-Subsystem-Linux</pre>
<div>
 </div>
2. Once rebooted, open the Windows App store and search for the "Kali Linux" application, or alternatively click here to go there directly. Install the app and enjoy Kali! 
Updating Kali Linux on WSL 
 
 
Updating Kali Linux on WSL is no different from any other instance of Kali: 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">apt-get update
apt-get dist-upgrade</pre>
Here’s a quick video of the process: 
 
<div class="w-video ratio_16x9" style="background-color: #111111; box-sizing: border-box; color: #666666; font-family: "Open Sans", sans-serif; font-size: 14px;">
<div class="w-video-h" style="box-sizing: border-box; height: 0px; overflow: hidden; padding-bottom: 448.875px; position: relative;">
<iframe allowfullscreen="" mozallowfullscreen="" src="https://player.vimeo.com/video/258822932?portrait=0&color=00adef" style="border-style: none; border-width: initial; box-sizing: border-box; height: 448.875px; left: 0px; max-width: 100%; position: absolute; top: 0px; width: 798px;" webkitallowfullscreen=""></iframe></div>
</div>
<div class="vc_empty_space" style="background-color: white; box-sizing: border-box; color: #666666; font-family: "Open Sans", sans-serif; font-size: 14px; height: 32px;">
 </div>
<div class="vc_empty_space" style="background-color: white; box-sizing: border-box; height: 32px;">
Installing Penetration Testing tools on Kali</div>
<div class="vc_empty_space" style="background-color: white; box-sizing: border-box; height: 32px;">
Installing tools from the Kali Linux repository is usually done via apt commands. For example, to install the Metasploit Framework, you can simply:</div>
<div class="vc_empty_space" style="background-color: white; box-sizing: border-box; height: 32px;">
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">apt-get update
apt-get install metasploit-framework</pre>
</div>
 
 
Note: Some Kali tools are identified by antivirus software as malware. One way to deal with this situation is to allow antivirus exceptions on the directory in which the Kali chroot resides in. The following video walks you through this process: 
 
<div class="w-video ratio_16x9" style="background-color: #111111; box-sizing: border-box; color: #666666; font-family: "Open Sans", sans-serif; font-size: 14px;">
<div class="w-video-h" style="box-sizing: border-box; height: 0px; overflow: hidden; padding-bottom: 448.875px; position: relative;">
<iframe allowfullscreen="" mozallowfullscreen="" src="https://player.vimeo.com/video/258892544?portrait=0&color=00adef" style="border-style: none; border-width: initial; box-sizing: border-box; height: 448.875px; left: 0px; max-width: 100%; position: absolute; top: 0px; width: 798px;" webkitallowfullscreen=""></iframe></div>
</div>
<div class="vc_empty_space" style="background-color: white; box-sizing: border-box; color: #666666; font-family: "Open Sans", sans-serif; font-size: 14px; height: 32px;">
 </div>
<div class="vc_empty_space" style="background-color: white; box-sizing: border-box; height: 32px;">
Recovering from a failed Kali WSL instance</div>
Sometimes, you can inadvertently kill your Kali WSL instance, due to an overzealous command, an unintentional action, or even due to Kali or WSL bugs. If this happens, here is a quick recovery guide to get back on top of things. Note: this process will wipe your Kali WSL chroot, and re-extract a new copy. Any changes made to the filesystem will be gone, and reset to default. 
 
<div class="w-video ratio_16x9" style="background-color: #111111; box-sizing: border-box; color: #666666; font-family: "Open Sans", sans-serif; font-size: 14px;">
<div class="w-video-h" style="box-sizing: border-box; height: 0px; overflow: hidden; padding-bottom: 448.875px; position: relative;">
<iframe allowfullscreen="" mozallowfullscreen="" src="https://player.vimeo.com/video/258835347?portrait=0&color=00adef" style="border-style: none; border-width: initial; box-sizing: border-box; height: 448.875px; left: 0px; max-width: 100%; position: absolute; top: 0px; width: 798px;" webkitallowfullscreen=""></iframe></div>
</div>
<div class="vc_empty_space" style="background-color: white; box-sizing: border-box; color: #666666; font-family: "Open Sans", sans-serif; font-size: 14px; height: 32px;">
 </div>
Food for thought 
 
The availability of the Kali Linux platform and toolset on Windows 10 brings with it many exciting possibilities which we havent even begun to grasp – here’s one example that got us scratching our heads. While not officially supported by WSL yet, we’ve tested running a desktop manager such as XFCE on WSL’d Kali…and it seems to work quite well: 
 
<div class="w-video ratio_16x9" style="background-color: #111111; box-sizing: border-box; color: #666666; font-family: "Open Sans", sans-serif; font-size: 14px;">
<div class="w-video-h" style="box-sizing: border-box; height: 0px; overflow: hidden; padding-bottom: 448.875px; position: relative;">
<iframe allowfullscreen="" mozallowfullscreen="" src="https://player.vimeo.com/video/255052199?portrait=0&color=00adef" style="border-style: none; border-width: initial; box-sizing: border-box; height: 448.875px; left: 0px; max-width: 100%; position: absolute; top: 0px; width: 798px;" webkitallowfullscreen=""></iframe></div>
</div>
 
 
Main Source - <a href="https://www.kali.org/news/kali-linux-in-the-windows-app-store/">https://www.kali.org/news/kali-linux-in-the-windows-app-store/</a> 
 </div>

How to install Kali Linux on the Windows

Kali-Linux On Windows No, really…this isn't clickbait. For the past few weeks, we’ve been working with the Microsoft WSL team to get ...

How to find files containing specific text in Linux

<div dir="ltr" style="text-align: left;" trbidi="on">
<div style="text-align: center;">
Find files containing specific text in Linux</div>
 
Find files containing specific text using grep command 
grep is a command-line utility for searching plain-text data sets for lines that match a regular expression. Its name comes from the ed command g/re/p (globally search a regular expression and print), which has the same effect: doing a global search with the regular expression and printing all matching lines. Grep was originally developed for the Unix operating system, but later available for all Unix-like systems. 
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgmSfa5gfpg7IHq5mo4T7SHu_Cl3baveLg-xsoRu3kxODgKyT2LN2J7nwZThgySbn7tR5rogvXIbYnjg4nDea8sLQazM9oEpGHniruu0_fTDG58SasIVf0NZWEmjyQ9w9UtlcmquEhNQRA/s1600/find-command-in-linux-hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="256" data-original-width="512" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgmSfa5gfpg7IHq5mo4T7SHu_Cl3baveLg-xsoRu3kxODgKyT2LN2J7nwZThgySbn7tR5rogvXIbYnjg4nDea8sLQazM9oEpGHniruu0_fTDG58SasIVf0NZWEmjyQ9w9UtlcmquEhNQRA/s1600/find-command-in-linux-hackthesec.co.in.png" /></a></div>
 
grep command syntax 
 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">grep "text string to search” directory-path</pre>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">grep [option] "text string to search” directory-path</pre>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">grep -r "text string to search” directory-path</pre>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">grep -r -H "text string to search” directory-path</pre>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">egrep -R "word-1|word-2” directory-path</pre>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">egrep -w -R "word-1|word-2” directory-path</pre>
<div>
Find files containing specific text using grep command examples</div>
<div>
 </div>
<div>
In this example, we will search for 'PULSEAUDIO_SYSTEM_START' in all configuration files located in /etc directory.</div>
<div>
 </div>
<div>
Now there's a small problem, depending on your Linux distro, Find command Syntax can be slightly different.</div>
<div>
 </div>
<div>
*If you know the exact location and directory you're after, then use</div>
<div>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">root@hackthesec:~# grep "PULSEAUDIO_SYSTEM_START" /etc/default/pulseaudio 
PULSEAUDIO_SYSTEM_START=1
</pre>
<div>
*If you know the exact directory with the files containing that specific text, then use</div>
<div>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">root@hackthesec:~# grep "PULSEAUDIO_SYSTEM_START" /etc/default/*
grep: /etc/default/kdm.d: Is a directory
/etc/default/pulseaudio:PULSEAUDIO_SYSTEM_START=1
root@hackthesec:~#
</pre>
<div>
If you don't know the exact location of the file that contains the specific text you’re looking for, then you need to search all sub-directories recursively.</div>
<div>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">root@hackthesec:~# grep -r "PULSEAUDIO_SYSTEM_START" /etc/default/*
/etc/default/pulseaudio:PULSEAUDIO_SYSTEM_START=1
root@hackthesec:~#</pre>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">root@hackthesec:~# grep -R "PULSEAUDIO_SYSTEM_START" /etc/default/*
/etc/default/pulseaudio:PULSEAUDIO_SYSTEM_START=1
root@hackthesec:~#</pre>
</div>
<div>
Now what if you are searching through a massive file and there might be many outputs similar to what you’re looking for.. you might want to use --col flag to color code your output which searching files containing specific strings.</div>
<div>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">root@hackthesec:~# grep --col 'usb 1-1.4' /var/log/messages
Apr 4 09:14:25 kali kernel: [1191164.780496] usb 1-1.4: new low-speed USB device number 21 using ehci-pci
root@hackthesec:~#</pre>
</div>
<div>
Now I want to display all files with colorer output with containing specific text and instead of showing the whole content of the files</div>
<div>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">root@hackthesec:~# grep --col -r 'Linux version 3.14-kali1' /var/log/* | cut -d: -f1
/var/log/dmesg
/var/log/dmesg.0
/var/log/installer/syslog
root@hackthesec:~#</pre>
</div>
<div>
<div>
When you're using grep, depending on the commands used and permission you have on the system, you might see any of the following errors.</div>
<div>
 </div>
<div>
* Input/output error</div>
<div>
* recursive directory loop</div>
<div>
* No such file or directory</div>
<div>
* No such device or address</div>
<div>
* Permission denied</div>
<div>
 </div>
<div>
If you want to hide all errors or warning message spamming your output window(specifically useful when you're trying to use grep on a script) generated by the grep command, append 2>/dev/null to grep command. This will send and hide unwanted output to /dev/null device:</div>
</div>
<div>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">root@hackthesec:~# grep -R "PULSEAUDIO_SYSTEM_START" /etc/* 2>/dev/null 
/etc/default/pulseaudio:PULSEAUDIO_SYSTEM_START=1
/etc/init.d/pulseaudio:PULSEAUDIO_SYSTEM_START=0
/etc/init.d/pulseaudio:if [ "$PULSEAUDIO_SYSTEM_START" != "1" ]; then
/etc/rc0.d/K01pulseaudio:PULSEAUDIO_SYSTEM_START=0
/etc/rc0.d/K01pulseaudio:if [ "$PULSEAUDIO_SYSTEM_START" != "1" ]; then
/etc/rc1.d/K01pulseaudio:PULSEAUDIO_SYSTEM_START=0
/etc/rc1.d/K01pulseaudio:if [ "$PULSEAUDIO_SYSTEM_START" != "1" ]; then
/etc/rc2.d/S20pulseaudio:PULSEAUDIO_SYSTEM_START=0
/etc/rc2.d/S20pulseaudio:if [ "$PULSEAUDIO_SYSTEM_START" != "1" ]; then
/etc/rc3.d/S20pulseaudio:PULSEAUDIO_SYSTEM_START=0
/etc/rc3.d/S20pulseaudio:if [ "$PULSEAUDIO_SYSTEM_START" != "1" ]; then
/etc/rc4.d/S20pulseaudio:PULSEAUDIO_SYSTEM_START=0
/etc/rc4.d/S20pulseaudio:if [ "$PULSEAUDIO_SYSTEM_START" != "1" ]; then
/etc/rc5.d/S20pulseaudio:PULSEAUDIO_SYSTEM_START=0
/etc/rc5.d/S20pulseaudio:if [ "$PULSEAUDIO_SYSTEM_START" != "1" ]; then
/etc/rc6.d/K01pulseaudio:PULSEAUDIO_SYSTEM_START=0
/etc/rc6.d/K01pulseaudio:if [ "$PULSEAUDIO_SYSTEM_START" != "1" ]; then
root@hackthesec:~#</pre>
</div>
<div>
<div>
What if you're not sure about the case of the text you're after? You can use -i to ignore case.</div>
<div>
 </div>
<div>
Below example shows the difference between -i flag. First command didn’t find the text, second command did as we used -i flag to ignore case.</div>
</div>
<div>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">root@hackthesec:~# grep -r "pulseaudio_system_start" /etc/default/*
root@hackthesec:~# 
root@hackthesec:~# grep -i -r "pulseaudio_system_start" /etc/default/*
/etc/default/pulseaudio:PULSEAUDIO_SYSTEM_START=1
root@hackthesec:~#</pre>
</div>
<div>
I always prefer using grep command with -r and --col flag in Debian Linux as -r complains less about permissions, files, directory etc. and of course some color helps on the eyes when you’re browsing through many lines.</div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdmES88qRq5q2S7T9eloxwGBj7Q_4TNKpHoxJrzaHNO5JFpsQd52ekNYQtKsk03EFGlHDRp9evGLye66Gs1H1pIHZBXSl4SbjLqVkCmN9OA-3D7lHu4C3YOmEHVFiqwADcA4237wkbdVk/s1600/How-to-find-files-containing-specific-text-in-Linux-hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="199" data-original-width="656" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdmES88qRq5q2S7T9eloxwGBj7Q_4TNKpHoxJrzaHNO5JFpsQd52ekNYQtKsk03EFGlHDRp9evGLye66Gs1H1pIHZBXSl4SbjLqVkCmN9OA-3D7lHu4C3YOmEHVFiqwADcA4237wkbdVk/s1600/How-to-find-files-containing-specific-text-in-Linux-hackthesec.co.in.png" /></a></div>
<div>
 </div>
<div>
 </div>
<div>
<a href="http://www.hackthesec.co.in/">HackTheSec</a></div>
</div>
</div>
</div>

How to find files containing specific text in Linux

Find files containing specific text in Linux Find files containing specific text using grep command grep is a command-line utility for ...

How to Install LEMP Stack on Debian 9

<div dir="ltr" style="text-align: left;" trbidi="on">
<div style="text-align: center;">
Install LEMP Stack on Debian 9</div>
<div style="text-align: center;">
 </div>
Today we are going to guide you install LEMP stack to brand new Debian GNU/Linux 9 Stretch. <a href="http://www.hackthesec.co.in/search/label/LEMP">LEMP</a> stands for Linux, <a href="http://www.hackthesec.co.in/search/label/NGINX">Nginx </a>(as in Engine X), MySQL and PHP. From Debian 9, <a href="http://www.hackthesec.co.in/search/label/MariaDB">Mariadb</a> is the default mysql server. But you can also choose <a href="http://www.hackthesec.co.in/search/label/Mysql">mysql</a> for installation. It is the counterpart of more popular LAMP stack except instead of Apache httpd we use nginx. Earlier we have tried LEMP stack on Ubuntu and docker container.  
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgg_CyZ2-sqaQ5zeqH6JsLUMcrlZhFxzGRc4-5qXc-zZ4ME2BNzx1EM_rKnNCfr3RsjuKfAEKXP23KNH8bvXNA7loj4U5OLKY70uZxVjad0ZRjH0DwLC9PETejcnlyZL0rY1uIxcLrXvh4/s1600/Debian9_LAMP.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="341" data-original-width="713" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgg_CyZ2-sqaQ5zeqH6JsLUMcrlZhFxzGRc4-5qXc-zZ4ME2BNzx1EM_rKnNCfr3RsjuKfAEKXP23KNH8bvXNA7loj4U5OLKY70uZxVjad0ZRjH0DwLC9PETejcnlyZL0rY1uIxcLrXvh4/s1600/Debian9_LAMP.png" /></a></div>
 
Installing Nginx, Mariadb and PHP 
 
Installation of nginx, MariaDB and PHP by bellow command line from bash terminal  
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">apt install nginx mysql-server mysql-client php-fpm php-mysql libfcgi0ldbl</pre>
Now start all needed services with systemd and enable them to start at boot 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;"># systemctl start php7.0-fpm nginx mysql
# systemctl enable php7.0-fpm nginx mysql</pre>
Configuring LEMP Stack 
 
Now Configure the mysql through bellow command line and use "y" for every question and set the mysql root password.  
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">mysql_secure_installation</pre>
Now you need to bind socket for fastcgi through bellow command line  
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">cgi-fcgi -bind -connect /run/php/php7.0-fpm.sock</pre>
Now we are going to configure sites in nginx configuration folder. First we move default config as backup for security purpose 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">mv /etc/nginx/sites-available/default /etc/nginx/sites-available/df.bk</pre>
After that we will make our own configuration file by bellow command line 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">nano /etc/nginx/sites-available/default</pre>
After that paste the bellow lines on the "default" empty file  
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;"> server {
 listen 80 default_server;
 listen [::]:80 default_server;
 root /var/www/html;
 index index.php index.html index.htm index.nginx-debian.html;

server_name _;
        location / {
                try_files $uri $uri/ =404;
        }

location ~ \.php$ {
 include snippets/fastcgi-php.conf;
 fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;
 }
}</pre>
<div>
 </div>
Now make a index.php file in /var/www/html/ by bellow command line 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">echo "<?php phpinfo(); ?>" > /var/www/html/index.php</pre>
Now check the mysql is working properly or not. First create a database user and password also a database on the mysql by follow command line  
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">mysql -u root -e "CREATE USER 'hackthesec'@'%' IDENTIFIED BY 'test@123';"

mysql -u root -e "GRANT ALL PRIVILEGES ON *.* TO 'hackthesec'@'%' WITH GRANT OPTION"</pre>
To check the mysql is working or not use the following command 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">nano /var/www/html/db.php</pre>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;"><?php
$dbh = mysqli_connect('localhost', 'hackthesec', 'test@123');
if (!$dbh) {
die('Could not connect: ' . mysqli_error());
}
echo 'Connected successfully';
mysqli_close($dbh);
?></pre>
 
Now reboot the system or restart the services .. 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">systemctl restart php7.0-fpm nginx mysql</pre>
Now open your web browser and hit your web server ip you will see the bellow test page. 
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhog28ZsH9WCt0c57LCs99DOYAVXK9Q1py5BYGxBE_h4X_iJwRdJXq42WHOHT4xMvDvK4roIC0UsGHeS2uDNHpBfAORRVKQG8N5LcDZZf_RxOdfw1p5UJxx7XXwr4GRfl9U8ODB4w48ga4/s1600/LAMP.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="855" data-original-width="1114" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhog28ZsH9WCt0c57LCs99DOYAVXK9Q1py5BYGxBE_h4X_iJwRdJXq42WHOHT4xMvDvK4roIC0UsGHeS2uDNHpBfAORRVKQG8N5LcDZZf_RxOdfw1p5UJxx7XXwr4GRfl9U8ODB4w48ga4/s1600/LAMP.jpg" /></a></div>
Allow lamp on firewall through bellow commands  
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">ufw allow 3306/tcp
ufw allow 80/tcp
ufw allow 443/tcp (allow if you use https)</pre>
 
@Hackthesec</div>

How to Install LEMP Stack on Debian 9

Install LEMP Stack on Debian 9 Today we are going to guide you install LEMP stack to brand new Debian GNU/Linux 9 Stretch. LEMP stan...

Magnus Open Source VOIP Softswitch And Billing

<div dir="ltr" style="text-align: left;" trbidi="on">
<div style="text-align: center;">
VOIP Softswitch And Billing Portal</div>
<div style="text-align: center;">
 </div>
MagnusBilling is a VoIP Billing server system that brings together the best IP billing telephony software in the market, creating a comprehensive, flexible and superior tool. MagnusBilling was made for companies that need freedom to build their own VoIP server.  
 
You will be able to chose your termination, giving your business larger flexibility and autonomy. 
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj8eMX5CtlAhfk9uyEIR0JEcJwOtUWuTzCVTFE_fypN1eDzL76jrmUr1qsZiXhtSc6pcsKP7sTAgJcymqJQAFrw1mGWFRaKaPY7l04jyiGNlAFYKxbFJmXmoYYeg96GSsSGM2uih4H-UbA/s1600/magnusbilling.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="647" data-original-width="1349" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj8eMX5CtlAhfk9uyEIR0JEcJwOtUWuTzCVTFE_fypN1eDzL76jrmUr1qsZiXhtSc6pcsKP7sTAgJcymqJQAFrw1mGWFRaKaPY7l04jyiGNlAFYKxbFJmXmoYYeg96GSsSGM2uih4H-UbA/s1600/magnusbilling.jpg" /></a></div>
 
MagnusBilling is a free billing OpenSource to Asterisk. 
 
Features of magnusbilling 
 
Softswitch class 4 & 5 
Voice broadcasting 
CallingCard 
DID Management 
SMS sending 
CallShop 
CidCallBack 
0800Web 
IVR 
Call queue 
 
Integrated with asterisk 
 
Many More : - https://www.magnusbilling.com/wiki 
 
How to install it ================= 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">cd /usr/src
yum -y install wget
wget http://downloads.sourceforge.net/project/magnusbilling/install.sh
chmod +x install.sh
./install.sh</pre>
 
WARNING!! THE SERVER WILL BE REBOOTED AFTER THE INSTALL!! 
<div style="background-color: white; box-sizing: border-box; font-family: Roboto, Raleway, Helvetica, Arial, sans-serif; font-size: 14px; margin-bottom: 10px;">
MagnusBilling's dashboard: <a href="http://your_ip/" style="background-color: transparent; box-sizing: border-box; color: black; text-decoration-line: none; transition: color 400ms, background-color 400ms;">http://your_ip/</a></div>
<div style="background-color: white; box-sizing: border-box; font-family: Roboto, Raleway, Helvetica, Arial, sans-serif; font-size: 14px; margin-bottom: 10px;">
Default user: root</div>
<div style="background-color: white; box-sizing: border-box; font-family: Roboto, Raleway, Helvetica, Arial, sans-serif; font-size: 14px; margin-bottom: 10px;">
Default password: magnus</div>
<div style="background-color: white; box-sizing: border-box; font-family: Roboto, Raleway, Helvetica, Arial, sans-serif; font-size: 14px; margin-bottom: 10px;">
Remember to change the root's password!!!</div>
 </div>

Magnus Open Source VOIP Softswitch And Billing

VOIP Softswitch And Billing Portal MagnusBilling is a VoIP Billing server system that brings together the best IP billing telephony sof...

How-to extend a root LVM partition online

<div dir="ltr" style="text-align: left;" trbidi="on">
<div style="text-align: center;">
Extend a root LVM partition online</div>
<div style="text-align: center;">
 </div>
There is also a quick remedy for the emergency situation when your root partition runs out of disk space. There is a feature specific to ext3 and ext4 that can help the goal of resolving the full disk situation. Unless explicitly changed during filesystem creation, both by default reserve five percent (5%) of a volume capacity to the superuser (root). 
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg49p9cF_CO5MMzNQBEy_f-AZhdR8y3PPuMATkF7r864Qhex6kGRF8DAdINHqjKC0ToWJLtwK5U12uv00fgXqGrVtCrftGyoa6Ny0c45fpMIAY2mEJkkMlgEQARGDMTeIXE7dmvlWlL0Ww/s1600/maxresdefault.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="360" data-original-width="639" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg49p9cF_CO5MMzNQBEy_f-AZhdR8y3PPuMATkF7r864Qhex6kGRF8DAdINHqjKC0ToWJLtwK5U12uv00fgXqGrVtCrftGyoa6Ny0c45fpMIAY2mEJkkMlgEQARGDMTeIXE7dmvlWlL0Ww/s1600/maxresdefault.jpg" /></a></div>
 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;"># df -Th
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/vg_main-lv_root
 ext4 8.4G 8.0G 952K 100% /
tmpfs tmpfs 499M 0 499M 0% /dev/shm
/dev/vda1 ext4 485M 33M 428M 8% /boot

# dumpe2fs /dev/vg_main/lv_root | grep 'Reserved block count'
dumpe2fs 1.41.12 (17-May-2010)
Reserved block count: 111513</pre>
It turned out 111513 of 4KB blocks were reserved for the superuser, which was exactly five percent of the volume capacity. 
 
How to enable it? 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;"># tune2fs -m 0 /dev/vg_main/lv_root 
tune2fs 1.41.12 (17-May-2010)
Setting reserved blocks percentage to 0% (0 blocks)
# df -Th
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/vg_main-lv_root
 ext4 8.4G 8.0G 437M 95% /
tmpfs tmpfs 499M 0 499M 0% /dev/shm
/dev/vda1 ext4 485M 33M 428M 8% /boot</pre>
 
Now that we have some free space on the root partition to work on we can extend the LVM partition: 
 
 
Create a new partition of appropriate size using fdisk 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">fdisk /dev/sdb1</pre>
 
This is a key sequence on the keyboard to create a new LVM type (8e) partition: 
 
n, p, 1, enter (accept default first sector), enter (accept default last sector), t, 8e, w 
 
 
Create a new Physical Volume 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;"># pvcreate /dev/sdb1
 Writing physical volume data to disk "/dev/sdb1"
 Physical volume "/dev/sdb1" successfully created</pre>
Extend a Volume Group 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;"># vgextend vg_main /dev/sdb1
 Volume group "vg_main" successfully extended</pre>
Extend your LVM 
 
 
- extend the size of your LVM by the amount of free space on PV 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;"># lvextend /dev/vg_main/lv_root /dev/sdb1
 Extending logical volume lv_root to 18.50 GiB
 Logical volume lv_root successfully resized</pre>
- or with a given size 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">lvextend -L +10G /dev/vg_main/lv_root</pre>
 
Finally resize the file system online 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;"># resize2fs /dev/vg_main/lv_root
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/vg_main/lv_root is mounted on /; on-line resizing required
old desc_blocks = 1, new_desc_blocks = 2
Performing an on-line resize of /dev/vg_main/lv_root to 4850688 (4k) blocks.
The filesystem on /dev/vg_main/lv_root is now 4850688 blocks long.</pre>
Now we can set the reserved blocks back to the default percentage - 5% 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">tune2fs -m 5 /dev/mapper/vg_main-lv_root
Results:

# df -Th
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/vg_main-lv_root
 ext4 19G 8.0G 9.4G 46% /
tmpfs tmpfs 499M 0 499M 0% /dev/shm
/dev/vda1 ext4 485M 33M 428M 8% /boot</pre>
 </div>

How-to extend a root LVM partition online

Extend a root LVM partition online There is also a quick remedy for the emergency situation when your root partition runs out of disk s...

How to Install and Configure Nextcloud on CentOS 7 / RHEL 7

<div dir="ltr" style="text-align: left;" trbidi="on">
Install and Configure Nextcloud on CentOS / RHEL 7 
 
Nextcloud is functionally very similar to the widely used Dropbox, with the primary functional difference being that Nextcloud is free and open-source, and thereby allowing anyone to install and operate it without charge on a private server.  
 
In contrast to proprietary services like Dropbox, the open architecture allows adding additional functionality to the server in form of so-called applications. 
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjcCnuhnD5JV7hXxzNrLUGJBFH-PKLY7ZsM2-1VbEkPN_eAeh9DL0cSL4wpvR78lvHl1wFC8KR1fH0IwRLrfsBqb6u3mCUK7-MlaOt4jbni9Rbg1Rvt6BX4HXeBR_sC6ljsCd2TwTqxoi3l/s1600/nextcloud-hackthesec.co.in.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjcCnuhnD5JV7hXxzNrLUGJBFH-PKLY7ZsM2-1VbEkPN_eAeh9DL0cSL4wpvR78lvHl1wFC8KR1fH0IwRLrfsBqb6u3mCUK7-MlaOt4jbni9Rbg1Rvt6BX4HXeBR_sC6ljsCd2TwTqxoi3l/s1600/nextcloud-hackthesec.co.in.jpg" /></a></div>
 
Nextcloud is an actively maintained fork of ownCloud. 
<div style="clear: both; margin: 10px 0;">
<center>
<script async="" src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>

<ins class="adsbygoogle" data-ad-client="ca-pub-5744890361111211" data-ad-slot="1658755283" style="display: inline-block; height: 15px; width: 728px;"></ins></center>
</div>
 
Some of the Key features of Nextcloud are listed below: 
<div>
<ul style="text-align: left;">
<li>File access & sharing </li>
<li>Security & control </li>
<li>Mobile & desktop clients  </li>
<li>External storage </li>
<li>Calendar & Contacts  </li>
<li>Secure audio & video calls</li>
<li>Collabora Online Office</li>
<li>Videos of Nextcloud in action</li>
</ul>
<div>
Requirement to Install NextCloud on RHEL AND CENTOS</div>
</div>
<div>
 </div>
Minimum of 512 MB RAM 
Web Server : Apache (httpd) / Nginx 
Database Server : MariaDB / MySQL / PostgreSQL 
 
PHP 5.4 + 
 
Installation 
======== 
Use the below yum command to install Apache Web Server (httpd), PHP packages and its other dependent packages. 
 
In the default CentOS and RHEL repositories PHP 5.4 packages are available 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; color: white; font-family: monospace, serif; font-size: 14px; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">yum install httpd php php-mysql sqlite php-dom php-mbstring php-gd php-pdo php-json php-xml php-zip php-gd curl php-curl php-mcrypt php-pear</pre>
Start and startup enable apache web service using this command 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">systemctl start httpd ; systemctl enable httpd</pre>
MariaDB database for Nextcloud 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">yum install -y mariadb-server mariadb</pre>
 
Start and startup enable MariaDB service using this command 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">systemctl start mariadb; systemctl enable mariadb</pre>
For set MariaDB root password use the following command 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">mysql_secure_installation</pre>
After completed the MariaDB installation just create a database for next-cloud application for me my database name is "nextcloud_db". 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">[root@nextcloud ~]# mysql -u root -p
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 10
Server version: 5.5.47-MariaDB MariaDB Server
Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]> create database nextcloud_db;
Query OK, 1 row affected (0.00 sec)
MariaDB [(none)]></pre>
Create a database user (nxtuser) and grant all the privileges to the user on the database "nextcloud_db" 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">MariaDB [(none)]> grant all on nextcloud_db.* to 'nxtuser'@'localhost' identified by 'Nextcloud@123#';
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> exit
Bye
[root@nextcloud ~]#</pre>
Download the latest version of NextCloud 
 
First Install two packges on your server using bellow command 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">yum install wget bzip2 -y</pre>
After that download the file from nextcloud official website - <a href="https://download.nextcloud.com/server/releases/">ClickHere</a> 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">wget https://download.nextcloud.com/server/releases/nextcloud-9.0.53.tar.bz2</pre>
When your download is complete just extract the downloaded "nextcloud-9.0.53.tar.bz2" file to Web Server document root (/var/www/html) using bellow command. 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">tar -jxpvf nextcloud-9.0.53.tar.bz2 -C /var/www/html/</pre>
Set the required permissions on nextcloud directory and its sub directories and files 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">chown -R apache:apache nextcloud /var/www/html/nextcloud</pre>
Open the ports in firewall for nextcloud (or you can stop the firewall) using bellow command. 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">[root@nextcloud ~]# firewall-cmd --permanent --zone=public --add-service=http
[root@nextcloud ~]# firewall-cmd --permanent --zone=public --add-service=https
[root@nextcloud ~]# firewall-cmd --reload</pre>
In my Case I am putting selinux in disabled mod  using below command you can use it as permissive mod 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">setenforce 0</pre>
For Permanently disabled edit the following line and find this line"SELINUX=enforcing" to disabled 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">vi /etc/sysconfig/selinux</pre>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;"># This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of these two values:
# targeted - Targeted processes are protected,
# mls - Multi Level Security protection.
SELINUXTYPE=targeted
</pre>
<div>
 </div>
Now Access nextCloud portal from Web Browser 
 
After Complete the nextcloud installation you can access it from your web browser using your system ip or server ip 
 
In my case my server ip is - 192.168.2.251 
 
Specify the user name as admin and password that you want to set, Select the Database type as MariaDB and mentioned the database name, database user and its credentials. Once you’re are done with settings then click on finish Setup. 
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdUrqikKS0fdC9vlvzf9cX3bWfHm71ek6WelCDrecpcoLHugEpivoFl-Qhw5vVh5XP2fAWp0YrzONCRJrGDdgCfp03W2YewPc2SzHQ_CZwyyXnekMxKGxBGYZh94QRMM4Ns1uniGvdNm3P/s1600/nextcloud-gui-installation.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdUrqikKS0fdC9vlvzf9cX3bWfHm71ek6WelCDrecpcoLHugEpivoFl-Qhw5vVh5XP2fAWp0YrzONCRJrGDdgCfp03W2YewPc2SzHQ_CZwyyXnekMxKGxBGYZh94QRMM4Ns1uniGvdNm3P/s1600/nextcloud-gui-installation.jpg" /></a></div>
 
Change the upload file size limit for nextcloud and restart the apache service 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">vi /etc/php.ini
============================
post_max_size = 30M
upload_max_filesize = 30M</pre>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">systemctl restart httpd</pre>
Now start uploading the files and share with your contacts and whatever you want 
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg2PxEvhX1ArtRP5Fdy3pFhPQ8HeBKSsjGmEkn_A5A__-5WpoUcVJyaRfNioIJeS2gOK56ZBrqgZtA6oCilfDIimiMbdvu7ethxJtJXahn6xLwSeUsd7hiRGlNXTBIglUxhh9kh-QGR4n8N/s1600/nextcloud.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg2PxEvhX1ArtRP5Fdy3pFhPQ8HeBKSsjGmEkn_A5A__-5WpoUcVJyaRfNioIJeS2gOK56ZBrqgZtA6oCilfDIimiMbdvu7ethxJtJXahn6xLwSeUsd7hiRGlNXTBIglUxhh9kh-QGR4n8N/s1600/nextcloud.png" /></a></div>
 
<a class="g-profile" href="https://plus.google.com/113492055880844042777" target="_blank">+Linux Tutorial</a> 
 </div>