On Linux, you can remove a user from a group with:
1. Using the gpasswd Command
1. Press CTRL+ALT+T to open the terminal.
2. Run the “groups username” command to list the current groups of the specified user.
3. Type “sudo gpasswd -d username groupname” and hit Enter.
2. Using the deluser Command
1. Type “sudo deluser username groupname” and hit Enter.
2. Execute the “groups username” command for verification.