To find out which groups a user is a member of in Linux, you can use the groups command. The syntax is as follows:
groups <username>
Replace <username> with the username of the user you want to check. For example, to check the groups for the user “john”, you would run:
groups john
This will display a list of all the groups that the user “john” is a member of. For example:
john : john adm cdrom sudo dip plugdev lpadmin sambashare
In this example, the user “john” is a member of the following groups:
- john
- adm
- cdrom
- sudo
- dip
- plugdev
- lpadmin
- sambashare
Each group name is separated by a space. The user’s primary group is listed first, followed by any additional groups the user is a member of.
By using the groups command, you can easily find out which groups a user is in on a Linux system.