Note: The visudo command will open /etc/sudoers using the system's preferred text editor (usually vi or vim).Start reviewing and editing below this line: # Allow members of group sudo to execute any command In order to accomplish that, we will view the contents of /etc/sudoersand edit them where applicable. Debian usermod -aG sudo mynewusername CentOS usermod -aG wheel mynewusername FreeBSD pw group mod wheel -m mynewusername Step 4: Making sure your sudoers file is setup properlyIt is important to ensure that sudoers file located in /etc/sudoersis setup properly in order to allow sudo users to effectively use the sudo command. Essentially, there is no real difference except for the syntax used to become root, and users belonging to both groups can use the sudo command. Meanwhile, a sudo user would have use the sudo suįirst. The difference between wheel and sudo.In CentOS and Debian, a user belonging to the wheel group can execute su and directly ascend to root. For the purpose of this tutorial, we will use the sudo group for Debian. You can however manually add the wheel group using the groupadd command. Note: In Debian, the sudo group is often found instead of wheel. Adding your sudo user to the wheel group is entirely optional, but it is advisable. Debian adduser mynewusername CentOS adduser mynewusername FreeBSD adduser mynewusername Step 3: Adding the new user to the wheel group (optional)The wheel group is a user group which limits the number of people who are able to su to root. Or pkg_add -r sudo Step 2: Adding the sudo userA sudo user is a normal user account on a Linux or Unix machine. Step 1: Installing sudo Debian apt-get install sudo -y CentOS yum install sudo -y FreeBSD cd /usr/ports/security/sudo/ & make install clean A text editor installed on the server whether it's nano, vi, vim, emacs. A newly installed Linux server with your preferred distribution.Install mail command on Ubuntu/Debian/LinuxMint sudo apt-get install mailutilsĪfter installing mail command packages in your system, send a test email using the below command.In this tutorial we will show you the basic steps for disabling direct user access, create a user sudo, and set the sudo group on CentOS, Debian and FreeBSD.Install mail command on Fedora 22+ and CentOS/RHEL 8 sudo dnf install mailx.Install mail command on CentOS/Redhat 7/6 sudo yum install mailx. For RHEL based systems, this command installed from mailx rpm packages and on Debian based system this command found in mailutils package.Įxecute one the following command based on the operating system: Let’s use one of the below commands to install the mail command as per your operating system. There are many other alternatives to mail command for sending emails from Linux command line interface. Most Debian-based systems will show errors like “The program ‘mail’ is currently not installed. mail command is useful for sending emails from the Linux command line which is used for almost Linux operating systems. In minimum operating system installation only required packages are installed for running an operating system and skipped unnecessary packages are. With the minimum installation of any Linux operating system, you will not see most of the commands in your system.
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