How To Add and Delete Users on CentOS, RHEL & Fedora

<div dir="ltr" style="text-align: left;" trbidi="on"> <div class="separator" style="clear: both; text-align: center;"> </div> <h2 class="title single-title title20" style="background-color: white; border: 0px; font-size: 28px; line-height: 38px; margin: 0px 0px 5px; opacity: 1; outline: 0px; padding: 0px; transition: opacity 0.24s ease-in-out; vertical-align: baseline; visibility: visible;"> <u style="font-family: 'Roboto Slab';"><span style="color: red;"><i>Add & Delete Users on CentOS, RHEL & Fedora<br /></i></span></u><span style="font-family: Georgia, Times New Roman, serif;"><span style="font-size: 16px; font-weight: normal; line-height: 28px;">You may need to create separate account for every user want to connect this system. For adding new users</span><span style="font-size: 16px; font-weight: normal; line-height: 28px;"> in system there are two commands available in your system, </span><span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-size: 16px; line-height: 28px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">useradd</span><span style="font-size: 16px; font-weight: normal; line-height: 28px;"> and </span><span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-size: 16px; line-height: 28px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">adduser</span><span style="font-size: 16px; font-weight: normal; line-height: 28px;">. adduser command is the enhanced version of useradd command. adduser command uses useradd command in backend. This tutorial will help you to add and delete user on <a href="http://www.hackthesec.co.in/search/label/Centos" target="_blank">CentOS</a>, <a href="http://www.hackthesec.co.in/search/label/RHEL" target="_blank">RHEL</a>, Fedora and CoreOS operating systems.<br /></span></span></h2> <div class="separator" style="clear: both; text-align: center;"> <a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgD7BydDE2ME1SHFnI-jYkru4Z8LR2LYIjMucRR7qN6AxXJrl49u6p5qPXOmcfIBjjISh66JcF4CzdRraD3I77xCw4k_zUu_kqA-Oh3hbLa1xIgDxwizZ5sq8uZ1FaWRm3P_ub1WPWXb-py/s1600/adduser_hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgD7BydDE2ME1SHFnI-jYkru4Z8LR2LYIjMucRR7qN6AxXJrl49u6p5qPXOmcfIBjjISh66JcF4CzdRraD3I77xCw4k_zUu_kqA-Oh3hbLa1xIgDxwizZ5sq8uZ1FaWRm3P_ub1WPWXb-py/s1600/adduser_hackthesec.co.in.png" /></a></div> <div> <br /></div> <h2 class="heading1" style="background-color: white; border: 0px; font-family: 'Roboto Slab'; font-size: 24px; font-weight: bolder; line-height: 34px; margin: 45px 0px 12px; opacity: 1; outline: 0px; padding: 0px; transition: opacity 0.24s ease-in-out; vertical-align: baseline; visibility: visible;"> <span style="color: #0b5394;">1. Add New User</span></h2> <div> <span style="font-family: Georgia, Times New Roman, serif;"><span style="background-color: white; font-size: 16px; line-height: 28px;"> Following command will create new user </span><span style="background-color: white; font-size: 16px; line-height: 28px;">named ‘hackthesec’ on your system</span></span></div> <div> <pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="color: white;"># </span><span style="color: lime;">adduser </span><span style="color: white;">hackthesec </span></span></pre> <div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;"> <span style="font-family: Georgia, Times New Roman, serif;">Still you can’t login to your system with this account. You need to set a password to account to active it. Use this command to set new password.</span></div> <pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="color: white;"># passwd hackthesec Changing password for user hackthesec. New password: ************** Retype new password: ************** </span><span style="color: lime;">passwd: all authentication tokens updated successfully.</span></span><span style="font-size: 0.9em;"><span style="color: lime;"> </span></span></pre> <div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;"> <span style="font-family: Georgia, Times New Roman, serif;">By default above command will create users home directory as /home/<user name="">. But you can specify home directory at any other location using following command.</user></span></div> <pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="color: white;"># adduser hackthesec </span><span style="color: lime;">--home=/var/home/</span><span style="color: white; line-height: 1.3em;">hackthesec</span><span style="color: white;"> </span></span></pre> <div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;"> <span style="font-family: Georgia, Times New Roman, serif;">You can also specify any other shell for user in place of default, use <span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-size: inherit; font-weight: 700; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">–shell</span> switch followed by shell name as below.</span></div> <pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="color: white;"># adduser </span><span style="color: white; line-height: 1.3em;">hackthesec</span><span style="line-height: 1.3em;"><span style="color: white;"> </span><span style="color: lime;">--shell=/bin/bash</span></span></span></pre> <div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;"> <span style="font-family: Georgia, Times New Roman, serif;">If you don’t want to create users home directory. You can use –no-create-home switch with adduser command as below.</span></div> <pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="color: white;"># </span><span style="color: lime;">adduser </span><span style="color: white; line-height: 1.3em;">hackthesec</span><span style="color: white; line-height: 1.3em;"> --no-create-home</span></span></pre> <h2 class="heading1" style="background-color: white; border: 0px; font-family: 'Roboto Slab'; font-size: 24px; font-weight: bolder; line-height: 34px; margin: 45px 0px 12px; opacity: 1; outline: 0px; padding: 0px; transition: opacity 0.24s ease-in-out; vertical-align: baseline; visibility: visible;"> <span style="color: #0b5394;">2. Delete User from System</span></h2> <div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;"> <span style="font-family: Georgia, Times New Roman, serif;">Now its good to lock or delete any user from system which is no longer required. Use the following command to delete any user from system.</span></div> <pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="color: white;"># </span><span style="color: lime;">userdel</span><span style="color: white;"> hackthesec </span></span></pre> <div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;"> <span style="font-family: Georgia, Times New Roman, serif;">The above command will not delete users home directory. If you also want to delete users home directory use -r or –remove-home parameter with command, For example below command will delete user hackthesec and their home directory permanently.</span></div> <pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="color: white;"># </span><span style="color: lime;">userdel </span><span style="color: white;">hackthesec -r <a href="http://www.hackthesec.co.in/" target="_blank">www.hackthesec.co.in</a> <a href="http://www.twitter.com/hackthesecurity">www.twitter.com/hackthesecurity</a></span></span></pre> </div> </div>

How To Add and Delete Users on CentOS, RHEL & Fedora

Add & Delete Users on CentOS, RHEL & Fedora You may need to create separate account for every user want to connect this system. ...

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How To Add and Delete User in Ubuntu, Debian & LinuxMint

<div dir="ltr" style="text-align: left;" trbidi="on"> <h2 class="title single-title title20" style="background-color: white; border: 0px; font-family: 'Roboto Slab'; font-size: 28px; line-height: 38px; margin: 0px 0px 5px; opacity: 1; outline: 0px; padding: 0px; transition: opacity 0.24s ease-in-out; vertical-align: baseline; visibility: visible;"> <span style="color: #990000;"><u><i>Add and Delete User in Ubuntu, Debian & LinuxMint</i></u></span></h2> <div> <div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;"> <span style="font-family: Georgia, Times New Roman, serif;">You may need to create separate account for every user want to connect this system. For adding new users in system there are two commands available in your system, <span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-size: inherit; font-weight: 700; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">useradd</span> and <span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-size: inherit; font-weight: 700; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">adduser</span>. adduser command is the enhanced version of useradd command. adduser command uses useradd command in backend. This tutorial will help you to add and delete user in <b><a href="http://www.hackthesec.co.in/search/label/Ubuntu" target="_blank">Ubuntu</a></b>, <b><a href="http://www.hackthesec.co.in/search/label/Debian" target="_blank">Debian </a></b>and <b><a href="http://www.hackthesec.co.in/search/label/LinuxMint" target="_blank">LinuxMint </a></b>operating systems.</span></div> <h2 class="heading1" style="background-color: white; border: 0px; font-family: 'Roboto Slab'; font-size: 24px; font-weight: bolder; line-height: 34px; margin: 45px 0px 12px; opacity: 1; outline: 0px; padding: 0px; transition: opacity 0.24s ease-in-out; vertical-align: baseline; visibility: visible;"> <span style="color: #0b5394;">1. Add New User</span></h2> <div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;"> <span style="font-family: Georgia, Times New Roman, serif;">For this tutorial we are using adduser command for examples. Following command will create new user named ‘guest’ on your system</span></div> <pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="color: white; font-family: Courier New, Courier, monospace;">$ sudo adduser guest Adding user `</span></span><span style="color: white; font-family: 'Courier New', Courier, monospace; font-size: large; line-height: 1.3em;">guest</span><span style="color: white; font-family: 'Courier New', Courier, monospace; font-size: large; line-height: 1.3em;">' ...</span> <span style="font-size: large;"><span style="color: white; font-family: Courier New, Courier, monospace;">Adding new group `</span></span><span style="color: white; font-family: 'Courier New', Courier, monospace; font-size: large; line-height: 1.3em;">guest</span><span style="color: white; font-family: 'Courier New', Courier, monospace; font-size: large; line-height: 1.3em;">' (1003) ...</span> <span style="font-size: large;"><span style="color: lime;"><span style="font-family: Courier New, Courier, monospace;">Adding new user `</span></span><span style="color: white; font-family: 'Courier New', Courier, monospace; line-height: 1.3em;">guest</span><span style="color: lime; font-family: 'Courier New', Courier, monospace; line-height: 1.3em;">' (1003) with group `</span><span style="color: white; font-family: 'Courier New', Courier, monospace; line-height: 1.3em;">guest</span></span><span style="color: lime; font-family: 'Courier New', Courier, monospace; line-height: 1.3em;"><span style="font-size: large;">' </span>...</span> <span style="font-size: large;"><span style="color: white; font-family: Courier New, Courier, monospace;">Creating home directory `/home/</span></span><span style="color: white; font-family: 'Courier New', Courier, monospace; font-size: large; line-height: 1.3em;">guest</span><span style="color: white; font-family: 'Courier New', Courier, monospace; font-size: large; line-height: 1.3em;">' ...</span> <span style="font-size: large;"><span style="font-family: Courier New, Courier, monospace;"><span style="color: white;">Copying files from `/etc/skel' ... Enter new UNIX password: </span><span style="color: lime;">**************</span><span style="color: white;"> Retype new UNIX password: </span><span style="color: lime;">**************</span><span style="color: white;"> passwd: </span><span style="color: lime;">password updated successfully</span><span style="color: white;"> Changing the user information for </span></span></span><span style="color: white; font-family: 'Courier New', Courier, monospace; font-size: large; line-height: 1.3em;">guest</span><span style="font-size: large;"><span style="font-family: Courier New, Courier, monospace;"><span style="color: white;"> </span></span></span><span style="font-size: large;"><span style="color: white; font-family: Courier New, Courier, monospace;"> Enter the new value, or press ENTER for the default Full Name []: </span><span style="color: lime; font-family: Courier New, Courier, monospace;"> Room Number []: </span><span style="color: white; font-family: Courier New, Courier, monospace;"> Work Phone []: </span><span style="color: lime; font-family: Courier New, Courier, monospace;"> Home Phone []: </span><span style="color: white; font-family: Courier New, Courier, monospace;"> Other []: Is the information correct? [Y/n] y</span></span><span style="color: white; font-size: 0.9em;"> </span></pre> <div class="separator" style="clear: both; text-align: center;"> <a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGe23tdNvvXzfUFhQ7LoRhrSVPqzvxAnSFIVGTqtbUH71ImKn2jNlrxjrYlZMtQ8BIVehUt3D0O9gwiSZ0DX54QZ65fXrKWEdThd0Y4rYP0TEjuU1nkQORV-7lRxlUqFUJqP-ryU0lcmDR/s1600/add-delete-user_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="409" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGe23tdNvvXzfUFhQ7LoRhrSVPqzvxAnSFIVGTqtbUH71ImKn2jNlrxjrYlZMtQ8BIVehUt3D0O9gwiSZ0DX54QZ65fXrKWEdThd0Y4rYP0TEjuU1nkQORV-7lRxlUqFUJqP-ryU0lcmDR/s640/add-delete-user_www.hackthesec.co.in.png" width="640" /></a></div> <div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;"> <span style="font-family: 'Courier New', Courier, monospace;"><br /></span></div> <div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;"> <span style="font-family: Georgia, Times New Roman, serif;">By default above command will create users home directory as /home/<user name="">. But you can specify home directory at any other location using following command.</user></span></div> <pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="color: white; font-family: Courier New, Courier, monospace;">$sudo adduser </span><span style="color: lime;"><span style="font-family: 'Courier New', Courier, monospace; line-height: 1.3em;">guest</span><span style="font-family: Courier New, Courier, monospace; line-height: 1.3em;"> --home=/var/home/</span><span style="font-family: 'Courier New', Courier, monospace; line-height: 1.3em;">guest</span></span></span></pre> <div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;"> <span style="font-family: Georgia, Times New Roman, serif;">You can also specify any other shell for user in place of default, use <span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-size: inherit; font-weight: 700; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">–shell</span> switch followed by shell name as below.</span></div> <pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="color: white; font-family: Courier New, Courier, monospace;">$ sudo adduser </span></span><span style="color: white; font-family: 'Courier New', Courier, monospace; font-size: large; line-height: 1.3em;">guest</span><span style="color: white; font-family: 'Courier New', Courier, monospace; font-size: large; line-height: 1.3em;"> </span><span style="color: lime; font-family: 'Courier New', Courier, monospace; font-size: large; line-height: 1.3em;">--shell=/bin/bash</span></pre> <div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;"> <span style="font-family: Georgia, Times New Roman, serif;">If you don’t want to create users home directory. You can use –no-create-home switch with adduser command as below.</span></div> <pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="font-family: Courier New, Courier, monospace;"><span style="color: lime;">$ sudo adduser</span><span style="color: white;"> </span></span></span><span style="color: white; font-family: 'Courier New', Courier, monospace; font-size: large; line-height: 1.3em;">guest</span><span style="color: white; font-family: 'Courier New', Courier, monospace; font-size: large; line-height: 1.3em;"> --no-create-home</span></pre> <h2 class="heading1" style="background-color: white; border: 0px; font-family: 'Roboto Slab'; font-size: 24px; font-weight: bolder; line-height: 34px; margin: 45px 0px 12px; opacity: 1; outline: 0px; padding: 0px; transition: opacity 0.24s ease-in-out; vertical-align: baseline; visibility: visible;"> <span style="color: #0b5394;">2. Delete User from System</span></h2> <div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;"> <span style="font-family: Georgia, Times New Roman, serif;">Now its good to lock or delete any user from system which is no longer required. Use the following command to delete any user from system.</span></div> <pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="font-family: Courier New, Courier, monospace;"><span style="color: white;">$ sudo </span><span style="color: lime;">deluser</span><span style="color: white;"> </span></span></span><span style="color: white; font-family: 'Courier New', Courier, monospace; font-size: large; line-height: 1.3em;">guest</span></pre> <div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;"> <span style="font-family: Georgia, Times New Roman, serif;">The above command will not delete users home directory. If you also want to delete users home directory add –remove-home parameter with command, For example below command will delete user guest and their home directory permanently.</span></div> <pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="color: white; font-family: Courier New, Courier, monospace;">$ sudo deluser </span></span><span style="color: white; font-family: 'Courier New', Courier, monospace; font-size: large; line-height: 1.3em;">guest</span><span style="color: white; font-family: 'Courier New', Courier, monospace; font-size: large; line-height: 1.3em;"> </span><span style="color: lime; font-family: 'Courier New', Courier, monospace; font-size: large; line-height: 1.3em;">--remove-home</span></pre> <div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;"> <span style="font-family: Georgia, Times New Roman, serif;">You may also take backup of users home directory before deleting it using following command.</span></div> <pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="font-family: Courier New, Courier, monospace;"><span style="color: white;">$ sudo </span><span style="color: lime;">deluser </span></span><span style="font-family: 'Courier New', Courier, monospace; line-height: 1.3em;"><span style="color: lime;">guest</span><span style="color: white;"> </span></span><span style="color: white; font-family: 'Courier New', Courier, monospace; line-height: 1.3em;">--remove-home --backup --backup-to /var/archives/</span></span></pre> </div> </div>

How To Add and Delete User in Ubuntu, Debian & LinuxMint

Add and Delete User in Ubuntu, Debian & LinuxMint You may need to create separate account for every user want to connect this syste...

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