usermod
On CentOS, wheel group allow users in this group to run commands as user root with sudo.
To add a user to wheel group, run
|
1 |
usermod -aG wheel USERNAME |
On Ubuntu/Debian, use
|
1 |
usermod -aG sudo USERNAME |
Remove a User from Group
|
1 |
deluser USERNAME GROUP |
Example
|
1 2 3 4 |
root@ip-172-31-56-4:~# deluser designware sudo Removing user `designware' from group `sudo' ... Done. root@ip-172-31-56-4:~# |
Here we remove user designware from group sudo.
To remove a user from all seondary group, run
|
1 |
usermod -G "" USERNAME |
Change user shell
To disable SSH login, run
|
1 |
usermod -s /sbin/nologin USERNAME |
For example
|
1 |
usermod -s /sbin/nologin mysql |