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

nologin - prevent unprivileged users from logging into the system

If the file /etc/nologin exists and is readable, login(1) will allow access only to root. Other users will be shown the contents of this file and their logins will be refused. This provides a simple way of temporarily disabling all unprivileged logins.


login(1), shutdown(8)
2017-09-15 Linux