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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.
Pp
Default values are taken from the information provided in the
Pa /etc/usermgmt.conf
file, which, if running as root, is created using the built-in defaults if
it does not exist.
Pp
See
Xr user 8
for more information about
Dv EXTENSIONS .
Pp
After setting any defaults, and then reading values from
Pa /etc/usermgmt.conf ,
the following command line options are processed:
Bl -tag -width Ds
It 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.
It 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.
It 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 .
It 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
Pa /etc/usermgmt.conf
file.
See
Xr usermgmt.conf 5
for more details.
It Fl F
Force the user to change their password upon next login.
It Fl f Ar inactive-time
Set the time at which the password expires.
See the
Fl e
option.
It Fl G Ar secondary-group
Specify a secondary group to which the user will be added in the
Pa /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.)
It 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
Pa /etc/group
to describe the new group.
This value can be preset for all users by using the
Ar group
field in the
Pa /etc/usermgmt.conf
file.
See
Xr usermgmt.conf 5
for more details.
It 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
Pa /etc/usermgmt.conf
file.
See
Xr usermgmt.conf 5
for more details.
This option is included if built with
Dv EXTENSIONS .
It Fl l Ar new-user
Give the new user name.
It can consist of alphanumeric characters and the characters
Ql \&. ,
Ql \&- ,
and
Ql \&_ .
It 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.
It Fl o
Allow duplicate uids to be given.
It 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
Pa /etc/usermgmt.conf
file.
See
Xr usermgmt.conf 5
for more details.
This option is included if built with
Dv EXTENSIONS .
It Fl S
Allow samba user names with a trailing dollar sign to be modified.
This option is included if built with
Dv EXTENSIONS .
It 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
Pa /etc/usermgmt.conf
file.
See
Xr usermgmt.conf 5
for more details.
It 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
Pa /etc/usermgmt.conf
file.
See
Xr usermgmt.conf 5
for more details.
It Fl v
Enable verbose mode - explain the commands as they are executed.
This option is included if built with
Dv EXTENSIONS .
El
Pp
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
Bl -tag -width /etc/usermgmt.conf -compact
It 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 [email protected] .

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