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nologin(8) [freebsd man page]

NOLOGIN(8)						    BSD System Manager's Manual 						NOLOGIN(8)

nologin -- politely refuse a login SYNOPSIS
The nologin utility displays a message that an account is not available and exits non-zero. It is intended as a replacement shell field for accounts that have been disabled. To disable all logins, investigate nologin(5). SEE ALSO
login(1), nologin(5) HISTORY
The nologin utility appeared in 4.4BSD. BSD
June 19, 1993 BSD

Check Out this Related Man Page

PAM_NOLOGIN(8)						    BSD System Manager's Manual 					    PAM_NOLOGIN(8)

pam_nologin -- NoLogin PAM module SYNOPSIS
[service-name] module-type control-flag pam_nologin [options] DESCRIPTION
The NoLogin authentication service module for PAM provides functionality for only one PAM category: authentication. In terms of the module-type parameter, this is the ``auth'' feature. It also provides a null function for session management. NoLogin Authentication Module The NoLogin authentication component (pam_sm_authenticate()), always returns success for the superuser, and returns success for all other users if the file /etc/nologin does not exist. If /etc/nologin does exist, then its contents are echoed to non-superusers before failure is returned. If a "nologin" capability is specified in login.conf(5), then the file thus specified is used instead. This usually defaults to /etc/nologin. The following options may be passed to the authentication module: debug syslog(3) debugging information at LOG_DEBUG level. no_warn suppress warning messages to the user. These messages include reasons why the user's authentication attempt was declined. SEE ALSO
syslog(3), login.conf(5), pam.conf(5), nologin(8), pam(8) BSD
July 8, 2001 BSD
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