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

NAME

       usermod - Modify a user account

SYNOPSIS

       usermod [-c comment] [-d home_dir [-m]]
	       [-e expire_date] [-f inactive_time]
	       [-g initial_group] [-G group [,...]]
	       [-l login_name] [-p passwd]
	       [-s shell] [-u uid [-o]] [-L|-U] login

DESCRIPTION

       The  usermod  command  modifies	the system account files to reflect the changes that are specified on the command line.  The options which
       apply to the usermod command are:

       -c comment
	      The new value of the user's password file comment field.	It is normally modified using the chfn(1) utility.

       -d home_dir
	      The user's new login directory.  If the -m option is given the contents of the current home directory will be moved to the new  home
	      directory, which is created if it does not already exist.

       -e expire_date
	      The date on which the user account will be disabled.  The date is specified in the format YYYY-MM-DD.

       -f inactive_days
	      The number of days after a password expires until the account is permanently disabled.  A value of 0 disables the account as soon as
	      the password has expired, and a value of -1 disables the feature.  The default value is -1.

       -g initial_group
	      The group name or number of the user's new initial login group.  The group name must exist.  A group number must refer to an already
	      existing group.  The default group number is 1.

       -G group,[...]
	      A list of supplementary groups which the user is also a member of.  Each group is separated from the next by a comma, with no inter-
	      vening whitespace.  The groups are subject to the same restrictions as the group given with the -g option.  If the user is currently
	      a member of a group which is not listed, the user will be removed from the group

       -l login_name
	      The  name  of the user will be changed from login to login_name.	Nothing else is changed.  In particular, the user's home directory
	      name should probably be changed to reflect the new login name.

       -p passwd
	      The encrypted password, as returned by crypt(3).

       -s shell
	      The name of the user's new login shell.  Setting this field to blank causes the system to select the default login shell.

       -u uid The numerical value of the user's ID.  This value must be unique, unless the -o option is used.  The  value  must  be  non-negative.
	      Values  between  0  and  99  are typically reserved for system accounts.	Any files which the user owns and which are located in the
	      directory tree rooted at the user's home directory will have the file user ID changed automatically.  Files outside  of  the  user's
	      home directory must be altered manually.

       -L     Lock a user's password.  This puts a '!' in front of the encrypted password, effectively disabling the password.	You can't use this
	      option with -p or -U.

       -U     Unlock a user's password.  This removes the '!' in front of the encrypted password.  You can't use this option with -p or -L.

CAVEATS

       usermod will not allow you to change the name of a user who is logged in.  You must make certain that the named user is not  executing  any
       processes  when	this command is being executed if the user's numerical user ID is being changed.  You must change the owner of any crontab
       files manually.	You must change the owner of any at jobs manually.  You must make any changes involving NIS on the NIS server.

FILES

       /etc/passwd - user account information
       /etc/shadow - secure user account information
       /etc/group - group information

SEE ALSO

       chfn(1), chsh(1), passwd(1), crypt(3), groupadd(8), groupdel(8), groupmod(8), useradd(8), userdel(8)

AUTHOR

       Julianne Frances Haugh (jockgrrl@ix.netcom.com)

																	USERMOD(8)