how can superuser stop all other users login on system without changing in /etc/passwd file and without using userdel command?
Check if your OS supports:
echo "Sorry, no one allowed here but root!" > /etc/nologin
Will be deleted after a reboot automatically iirc.
Hi,
Type a message into the file /etc/nologin, then this will be shown and the login will be refused.
See man nologin
/Lakris
it's coooool.
but how does it work?
how creation of /etc/nologin file restrict all the users except superuser....
Because It Does. The login binary looks for this file. man login