nologin (8) ( FreeBSD man: Команды системного администрирования )
nologin (8) ( Русские man: Команды системного администрирования )
nologin (8) ( Linux man: Команды системного администрирования )
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.
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