nologin(5) redhat man page | unix.com

NOLOGIN(5)						     Linux Programmer's Manual							NOLOGIN(5)

NAME
       nologin - prevent non-root users from logging into the system

DESCRIPTION
       If  the	file  /etc/nologin  exists, login(1) will allow access only to root. Other users will be shown the contents of this file and their
       logins will be refused.

FILES
       /etc/nologin

SEE ALSO
       login(1), shutdown(8)

Linux								    1992-12-29								NOLOGIN(5)