Usermod
Lock barney's account (puts a '!' in front of the encrypted password in /etc/shadow
):
usermod -L barney
Add barney to group admins:
usermod -a -G admins barney
Change barney's username to Barney:
usermod -l Barney barney
Lock barney's account (puts a '!' in front of the encrypted password in /etc/shadow
):
usermod -L barney
Add barney to group admins:
usermod -a -G admins barney
Change barney's username to Barney:
usermod -l Barney barney