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How to remove Sudo privileges from a user?
It’s easy, just open sudo, and type the following in. Keep in mind that USERNAME can be replaced by the profile you are doing this to. In terminal type: This will only take sudo access away from the profile named USERNAME, and will not delete! This will remove the user named username from the group sudo.
How to know if a user has Sudo rights?
Another way to find out if a user has sudo access is by checking if the said user is member of the sudo group. There are several ways to check the groups of a user in Linux. The easiest and my favorite way is to use the groups command like this: groups user_name. If you see the group ‘sudo’ in the output, the user is a member
Who is a member of the sudo group?
If you see the group ‘sudo’ in the output, the user is a member of the sudo group and it should have sudo access.
Can you configure what commands can be run with sudo?
Yes, that’s right. You can configure what commands can be run with sudo and what cannot. This is useful in an environment where the dev team needs to run only a certain applications with sudo. Limiting their use of sudo to these applications only will help the system from unwarranted misuse of the sudo rights by the hands of the developers.
The user in question has sudo privileges because it is in the admin group. As wojox commented, you could use visudo and remove sudo privileges from the admin group, but that would remove sudo capabilities from all members of the admin group not just the one user. Alternatively, you can remove the user from the admin group.
How to prevent superuser access to Sudo Su?
This post outlines steps to tighten system security by preventing users with sudo access from gaining superuser privilege by the command:
What is the purpose of the sudo command?
The sudo command allows a system administrator to enable a user, or a group of users, to run specific command-line tools with different privileges (such as superuser “root” privilege) knowing only the original user password.
What happens if Sudo is not in sudoers file?
If all went well any sudo command should return a message the like of this: guest is not in the sudoers file. This incident will be reported. A guest logging in on this computer can no longer accidentally or willingly mess with the system, since you need to be root to do so.