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 page is part of release 3.54 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2012-04-16 NOLOGIN(5)
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