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nologin(5)                  BSD File Formats Manual                 nologin(5)


NAME

     nologin -- disallow logins


DESCRIPTION

     Programs such as login(1) disallow logins if the nologin file exists.
     The programs display the contents of nologin to the user if possible and
     interrupt the login sequence.  This makes it simple to temporarily pre-
     vent incoming logins systemwide.

     To disable logins on a per-account basis, investigate nologin(8).


SECURITY

     The nologin file is ignored for user root by default.


IMPLEMENTATION NOTES

     The nologin feature is implemented through login.conf(5), which allows to
     change the pathname of the file and to extend the list of users exempt
     from temporary login restriction.

     PAM-aware programs can be selectively configured to respect nologin using
     the pam_nologin(8) module via pam.conf(5).

     The nologin file will be removed at system boot if it resides in /var/run
     and cleanvar_enable is set to ``YES'' in rc.conf(5), which is default.
     Therefore system reboot can effectively re-enable logins.


FILES

     /var/run/nologin  default location of nologin


SEE ALSO

     login(1), login.conf(5), pam.conf(5), rc.conf(5), nologin(8),
     pam_nologin(8), shutdown(8)

BSD                              May 10, 2007                              BSD

Mac OS X 10.8 - Generated Sat Sep 1 14:14:23 CDT 2012
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