USERMOD(8)              NetBSD System Manager's Manual              USERMOD(8)

NAME
     usermod -- modify user login information

SYNOPSIS
     usermod [-FmoSv] [-C yes/no] [-c comment] [-d home-dir] [-e expiry-time]
             [-f inactive-time] [-G secondary-group] [-g gid | name | =uid]
             [-L login-class] [-l new-login] [-p password] [-s shell] [-u uid]
             user

DESCRIPTION
     The usermod utility modifies user login information on the system.

     Default values are taken from the information provided in the
     /etc/usermgmt.conf file, which, if running as root, is created using the
     built-in defaults if it does not exist.

     See user(8) for more information about EXTENSIONS.

     After setting any defaults, and then reading values from
     /etc/usermgmt.conf, the following command line options are processed:

     -C yes/no
             Enable user accounts to be temporary locked/closed.  The yes/no
             operand can be given as ``yes'' to lock the account or ``no'' to
             unlock the account.

     -c comment
             Set the comment field (also, for historical reasons known as the
             GECOS field) for the user.  The comment field will typically
             include the user's full name and, perhaps, contact information
             for the user.

     -d home-directory
             Set the home directory.  without populating it; if the -m option
             is specified, tries to move the old home directory to
             home-directory.

     -e expiry-time
             Set the time at which the account expires.  This can be used to
             implement password aging.  It should be entered in the form
             ``month day year'', where month is the month name (the first
             three characters are sufficient), day is the day of the month,
             and year is the year.  Time in seconds since the epoch (UTC) is
             also valid.  A value of 0 can be used to disable this feature.
             This value can be preset for all users using the expire field in
             the /etc/usermgmt.conf file.  See usermgmt.conf(5) for more
             details.

     -F      Force the user to change their password upon next login.

     -f inactive-time
             Set the time at which the password expires.  See the -e option.

     -G secondary-group
             Specify a secondary group to which the user will be added in the
             /etc/group file.

     -g gid | name | =uid
             Give the group name or identifier to be used for the user's pri-
             mary group.  If this is `=uid', then a uid and gid will be picked
             which are both unique and the same, and a line will be added to
             /etc/group to describe the new group.  This value can be preset
             for all users by using the group field in the /etc/usermgmt.conf
             file.  See usermgmt.conf(5) for more details.

     -L login-class
             Set the login class for the user.  See login.conf(5) for more
             information on user login classes.  This value can be preset for
             all users by using the class field in the /etc/usermgmt.conf
             file.  See usermgmt.conf(5) for more details.  This option is
             included if built with EXTENSIONS.

     -l new-user
             Give the new user name.  It can consist of alphanumeric charac-
             ters and the characters `.', `-', and `_'.

     -m      Move the home directory from its old position to the new one.  If
             -d is not specified, the new-user argument of the -l option is
             used; one of -d and -l is needed.

     -o      Allow duplicate uids to be given.

     -p password
             Specify an already-encrypted password for the user.  This pass-
             word can then be changed by using the chpass(1) utility.  This
             value can be preset for all users by using the password field in
             the /etc/usermgmt.conf file.  See usermgmt.conf(5) for more
             details.  This option is included if built with EXTENSIONS.

     -S      Allow samba user names with a trailing dollar sign to be modi-
             fied.  This option is included if built with EXTENSIONS.

     -s shell
             Specify the login shell for the user.  This value can be preset
             for all users by using the shell field in the /etc/usermgmt.conf
             file.  See usermgmt.conf(5) for more details.

     -u uid  Specify a new uid for the user.  Boundaries for this value can be
             preset for all users by using the range field in the
             /etc/usermgmt.conf file.  See usermgmt.conf(5) for more details.

     -v      Enable verbose mode - explain the commands as they are executed.
             This option is included if built with EXTENSIONS.

     Once the information has been verified, usermod uses pwd_mkdb(8) to
     update the user database.  This is run in the background.  At very large
     sites this can take several minutes.  Until this update is completed, the
     password file is unavailable for other updates and the new information is
     not available to programs.

EXIT STATUS
     The usermod utility exits 0 on success, and >0 if an error occurs.

FILES
     /etc/usermgmt.conf

SEE ALSO
     chpass(1), group(5), passwd(5), usermgmt.conf(5), pwd_mkdb(8), user(8),
     useradd(8), userdel(8)

HISTORY
     The usermod utility first appeared in NetBSD 1.5.  It is based on the
     addnerd package by the same author.

AUTHORS
     The usermod utility was written by Alistair G. Crooks <agc@NetBSD.org>.

NetBSD 5.1                       July 18, 2008                      NetBSD 5.1

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