This means that the user/group can use sudo on all hosts. ALL (before =): Specify the host on which the user/group can have sudo privileges.john or groupname: specifies the user or group being assigned the sudo privileges.To break down these lines in simple terms If you need to allow specific group of users to run the commands with sudo, simply add the line below replacing the groupname with your group. This line allows user john to run all commands with sudo upon authentication. Once you open the sudoers file, you can give a user sudoers rights as follows.įor example, to enable the user john to run commands with sudo privileges, simply add the line below on the sudoers file. Note that you cannot edit the sudoers file as an ordinary user with no sudo privileges. To use vim as your editor, simply run export EDITOR=vim This will open the sudoers file with your default editor, usually nano if the EDITOR variable has not been set. To edit the sudoers file, use the visudo command. A user whose privileges are defined in the sudoers file doesn’t necessarily have to be added to the sudo or wheel group. Well, you can explicitly give users sudo privileges by adding them to the sudoers file. Uid=1001(john) gid=1001(john) groups=1001(john), 10(wheel) Adding users to sudoers file in Linux On RHEL and its derivatives like CentOS usermod -aG wheel john id john To confirm the groups of the user, use id command. USERNAM specifies the name of the user being added to the sudo group.įor example, On Debian and its derivatives, to add a user called john to sudo group usermod -aG sudo john.sudo/wheel specifies the group to add the user.G specifies the supplementary groups to which the user is being added.a means add the user to the supplementary group that will be specified with -G option.To add user to wheel or sudo group, you can use the usermod command in the following syntax usermod -aG sudo/wheel USERNAME However, a password is not required if the invoking user is root, if the target user is the same as the invoking user, or if the policy has disabled authentication for the user or command. So based on the two lines above, sudoers security policy requires that users authenticate themselves before they can use sudo command. In RHEL derivatives # Allows people in group wheel to run all commands In Debian derivatives # Allow members of group sudo to execute any command In sudoers file, you will see the lines below The sudo/wheel group has the privileges it has based on what is defined on the sudoers file. So what is the difference between sudo/wheel group and sudoers file? Sudo group in Debian and its derivatives is called wheel group in CentOS and similar derivatives.Ī user can be given sudo privileges by being added to the sudo/ wheel group or by being added to the sudoers file, /etc/sudoers. So the only way this can happen is to give user sudo privileges by adding them to a sudo group or to sudoers file. More often than not, you want, as a non-root user, to run commands with elevated privileges in Linux. Now in order to check that ‘sudo’ can be used with the new user account, invoke any command which require superuser privileges.In this guide, we are going to learn how to add users to sudo group in Linux. In order to switch to the new user account, type in the su command as shown below : Read: How to switch users on Linux/Ubuntu 4-Sudo access test Sudo access privilege is granted to all members of the sudo group by default on Ubuntu.In order to add the new user you have created to the sudo group, you can use the usermod command as shown below : Read: How to fix Broken Pipe Error in Linux 3- Adding the new user to the sudo group You may be interested to read: The Sudoers File in UbuntuĪfter setting the password, the command above will set up a home folder for the new user as well as copy various configuration files in the home folder. Make sure to provide a complex password that can not be hacked. You will then be prompted in order to confirm the new user password, and other credentials (you can leave them blank by pressing ENTER to accept the default). In order to add a new user to the system, use the adduser command.Make sure to replace the username below with the new username to be created. Ssh How to change the hostname in Ubuntu 2. Read: ‘usermod’command usage in Ubuntu/Debian : a beginner’s guide Simple steps to create a new sudo user 1.Log in as the root user to your system: You will then be able to execute commands which require administrator privileges without logging in as a root user. This will be achieved without modifying the server’s Ubuntu sudoers file. In this short article, you will find an easy way to create a powerful new user who will have sudo access on Ubuntu. Normal users can acquire administrator privileges which is usually held by the root user, via the sudo command.
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