Copyright (c) 1999 Alistair G. Crooks. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. The name of the author may not be used to endorse or promote
products derived from this software without specific prior written
permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.Dd January 13, 2009 .Dt USERMOD 8 .Os .Sh NAME .Nm usermod .Nd modify user login information .Sh SYNOPSIS .Nm .Op Fl FmoSv .Op Fl C Ar yes/no .Op Fl c Ar comment .Op Fl d Ar home-dir .Op Fl e Ar expiry-time .Op Fl f Ar inactive-time .Op Fl G Ar secondary-group .Op Fl g Ar gid | name | Li =uid .Op Fl L Ar login-class .Op Fl l Ar new-login .Op Fl p Ar password .Op Fl s Ar shell .Op Fl u Ar uid .Ar user .Sh DESCRIPTION The .Nm utility modifies user login information on the system.
p Default values are taken from the information provided in the
a /etc/usermgmt.conf file, which, if running as root, is created using the built-in defaults if it does not exist.
p See .Xr user 8 for more information about .Dv EXTENSIONS .
p After setting any defaults, and then reading values from
a /etc/usermgmt.conf , the following command line options are processed: l -tag -width Ds t Fl C Ar yes/no Enable user accounts to be temporary locked/closed. The .Ar yes/no operand can be given as .Dq Ar yes to lock the account or .Dq Ar no to unlock the account. t Fl c Ar 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. t Fl d Ar home-directory Set the home directory without populating it; if the .Fl m option is specified, tries to move the old home directory to .Ar home-directory . t Fl e Ar 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 .Dq 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 .Ar expire field in the
a /etc/usermgmt.conf file. See .Xr usermgmt.conf 5 for more details. t Fl F Force the user to change their password upon next login. t Fl f Ar inactive-time Set the time at which the password expires. See the .Fl e option. t Fl G Ar secondary-group Specify a secondary group to which the user will be added in the
a /etc/group file. The .Ar secondary-group may be a comma-delimited list for multiple groups. Or the option may be repeated for multiple groups. (16 groups maximum.) t Fl g Ar gid | name | Li =uid Give the group name or identifier to be used for the user's primary group. If this is .Ql =uid , then a uid and gid will be picked which are both unique and the same, and a line will be added to
a /etc/group to describe the new group. This value can be preset for all users by using the .Ar group field in the
a /etc/usermgmt.conf file. See .Xr usermgmt.conf 5 for more details. t Fl L Ar login-class Set the login class for the user. See .Xr login.conf 5 for more information on user login classes. This value can be preset for all users by using the .Ar class field in the
a /etc/usermgmt.conf file. See .Xr usermgmt.conf 5 for more details. This option is included if built with .Dv EXTENSIONS . t Fl l Ar new-user Give the new user name. It can consist of alphanumeric characters and the characters .Ql . , .Ql - , and .Ql _ . t Fl m Move the home directory from its old position to the new one. If .Fl d is not specified, the .Ar new-user argument of the .Fl l option is used; one of .Fl d and .Fl l is needed. t Fl o Allow duplicate uids to be given. t Fl p Ar password Specify an already-encrypted password for the user. This password can then be changed by using the .Xr chpass 1 utility. This value can be preset for all users by using the .Ar password field in the
a /etc/usermgmt.conf file. See .Xr usermgmt.conf 5 for more details. This option is included if built with .Dv EXTENSIONS . t Fl S Allow samba user names with a trailing dollar sign to be modified. This option is included if built with .Dv EXTENSIONS . t Fl s Ar shell Specify the login shell for the user. This value can be preset for all users by using the .Ar shell field in the
a /etc/usermgmt.conf file. See .Xr usermgmt.conf 5 for more details. t Fl u Ar uid Specify a new uid for the user. Boundaries for this value can be preset for all users by using the .Ar range field in the
a /etc/usermgmt.conf file. See .Xr usermgmt.conf 5 for more details. t Fl v Enable verbose mode - explain the commands as they are executed. This option is included if built with .Dv EXTENSIONS . .El
p Once the information has been verified, .Nm uses .Xr 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. .Sh FILES l -tag -width /etc/usermgmt.conf -compact t Pa /etc/usermgmt.conf .El .Sh EXIT STATUS .Ex -std usermod .Sh SEE ALSO .Xr chpass 1 , .Xr group 5 , .Xr passwd 5 , .Xr usermgmt.conf 5 , .Xr pwd_mkdb 8 , .Xr user 8 , .Xr useradd 8 , .Xr userdel 8 .Sh HISTORY The .Nm utility first appeared in .Nx 1.5 . It is based on the .Ar addnerd package by the same author. .Sh AUTHORS The .Nm utility was written by .An Alistair G. Crooks .Aq agc@NetBSD.org .