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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 con-tents contents
     tents of nologin to the user if possible and interrupt the login sequence.  This makes it simple to
     temporarily prevent 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

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