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LOGIN(1) FreeBSD General Commands Manual LOGIN(1)
NAME
login -- log into the computer
SYNOPSIS
login [-fp] [-h hostname] [user]
DESCRIPTION
The login utility logs users (and pseudo-users) into the computer system.
If no user is specified, or if a user is specified and authentication of
the user fails, login prompts for a user name. Authentication of users
is configurable via pam(8). Password authentication is the default.
The following options are available:
-f When a user name is specified, this option indicates that proper
authentication has already been done and that no password need be
requested. This option may only be used by the super-user or
when an already logged in user is logging in as themselves.
-h Specify the host from which the connection was received. It is
used by various daemons such as telnetd(8). This option may only
be used by the super-user.
-p By default, login discards any previous environment. The -p
option disables this behavior.
Login access can be controlled via login.access(5) or the login class in
login.conf(5), which provides allow and deny records based on time, tty
and remote host name.
If the file /etc/fbtab exists, login changes the protection and ownership
of certain devices specified in this file.
Immediately after logging a user in, login displays the system copyright
notice, the date and time the user last logged in, the message of the day
as well as other information. If the file .hushlogin exists in the
user's home directory, all of these messages are suppressed. This is to
simplify logins for non-human users, such as uucp(1).
The login utility enters information into the environment (see
environ(7)) specifying the user's home directory (HOME), command inter-
preter (SHELL), search path (PATH), terminal type (TERM) and user name
(both LOGNAME and USER). Other environment variables may be set due to
entries in the login class capabilities database, for the login class
assigned in the user's system passwd record. The login class also con-
trols the maximum and current process resource limits granted to a login,
process priorities and many other aspects of a user's login environment.
Some shells may provide a builtin login command which is similar or iden-
tical to this utility. Consult the builtin(1) manual page.
The login utility will submit an audit record when login succeeds or
fails. Failure to determine the current auditing state will result in an
error exit from login.
FILES
/etc/fbtab changes device protections
/etc/login.conf login class capabilities database
/etc/motd message-of-the-day
/var/mail/user system mailboxes
.hushlogin makes login quieter
/etc/auth.conf configure authentication services
/etc/pam.d/login
pam(8) configuration file
/etc/security/audit_user
user flags for auditing
/etc/security/audit_control
global flags for auditing
SEE ALSO
builtin(1), chpass(1), csh(1), passwd(1), rlogin(1), getpass(3),
fbtab(5), login.access(5), login.conf(5), environ(7), pam(8)
HISTORY
A login utility appeared in Version 6 AT&T UNIX.
FreeBSD 6.2 October 16, 2004 FreeBSD 6.2
Man(1) output converted with
man2html and wrapped by fishsponge
This page was generated on Wed Sep 19 19:57:26 BST 2007
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