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USERDEL(8)			    System Management Commands			       USERDEL(8)

NAME
       userdel - delete a user account and related files

SYNOPSIS
       userdel [options] LOGIN

DESCRIPTION
       userdel is a low level utility for removing users. On Debian, administrators should
       usually use deluser(8) instead.

       The userdel command modifies the system account files, deleting all entries that refer to
       the user name LOGIN. The named user must exist.

OPTIONS
       The options which apply to the userdel command are:

       -f, --force
	   This option forces the removal of the user account, even if the user is still logged
	   in. It also forces userdel to remove the user's home directory and mail spool, even if
	   another user uses the same home directory or if the mail spool is not owned by the
	   specified user. If USERGROUPS_ENAB is defined to yes in /etc/login.defs and if a group
	   exists with the same name as the deleted user, then this group will be removed, even
	   if it is still the primary group of another user.

	   Note: This option is dangerous and may leave your system in an inconsistent state.

       -h, --help
	   Display help message and exit.

       -r, --remove
	   Files in the user's home directory will be removed along with the home directory
	   itself and the user's mail spool. Files located in other file systems will have to be
	   searched for and deleted manually.

	   The mail spool is defined by the MAIL_DIR variable in the login.defs file.

CONFIGURATION
       The following configuration variables in /etc/login.defs change the behavior of this tool:

       MAIL_DIR (string)
	   The mail spool directory. This is needed to manipulate the mailbox when its
	   corresponding user account is modified or deleted. If not specified, a compile-time
	   default is used.

       MAIL_FILE (string)
	   Defines the location of the users mail spool files relatively to their home directory.

       The MAIL_DIR and MAIL_FILE variables are used by useradd, usermod, and userdel to create,
       move, or delete the user's mail spool.

       MAX_MEMBERS_PER_GROUP (number)
	   Maximum members per group entry. When the maximum is reached, a new group entry (line)
	   is started in /etc/group (with the same name, same password, and same GID).

	   The default value is 0, meaning that there are no limits in the number of members in a
	   group.

	   This feature (split group) permits to limit the length of lines in the group file.
	   This is useful to make sure that lines for NIS groups are not larger than 1024
	   characters.

	   If you need to enforce such limit, you can use 25.

	   Note: split groups may not be supported by all tools (even in the Shadow toolsuite).
	   You should not use this variable unless you really need it.

       USERDEL_CMD (string)
	   If defined, this command is run when removing a user. It should remove any
	   at/cron/print jobs etc. owned by the user to be removed (passed as the first
	   argument).

	   The return code of the script is not taken into account.

	   Here is an example script, which removes the user's cron, at and print jobs:

	       #! /bin/sh

	       # Check for the required argument.
	       if [ $# != 1 ]; then
		    echo "Usage: $0 username"
		    exit 1
	       fi

	       # Remove cron jobs.
	       crontab -r -u $1

	       # Remove at jobs.
	       # Note that it will remove any jobs owned by the same UID,
	       # even if it was shared by a different username.
	       AT_SPOOL_DIR=/var/spool/cron/atjobs
	       find $AT_SPOOL_DIR -name "[^.]*" -type f -user $1 -delete \;

	       # Remove print jobs.
	       lprm $1

	       # All done.
	       exit 0

       USERGROUPS_ENAB (boolean)
	   If set to yes, userdel will remove the user's group if it contains no more members,
	   and useradd will create by default a group with the name of the user.

FILES
       /etc/group
	   Group account information.

       /etc/login.defs
	   Shadow password suite configuration.

       /etc/passwd
	   User account information.

       /etc/shadow
	   Secure user account information.

EXIT VALUES
       The userdel command exits with the following values:

       0
	   success

       1
	   can't update password file

       2
	   invalid command syntax

       6
	   specified user doesn't exist

       8
	   user currently logged in

       10
	   can't update group file

       12
	   can't remove home directory

CAVEATS
       userdel will not allow you to remove an account if there are running processes which
       belong to this account. In that case, you may have to kill those processes or lock the
       user's password or account and remove the account later. The -f option can force the
       deletion of this account.

       You should manually check all file systems to ensure that no files remain owned by this
       user.

       You may not remove any NIS attributes on a NIS client. This must be performed on the NIS
       server.

       If USERGROUPS_ENAB is defined to yes in /etc/login.defs, userdel will delete the group
       with the same name as the user. To avoid inconsistencies in the passwd and group
       databases, userdel will check that this group is not used as a primary group for another
       user, and will just warn without deleting the group otherwise. The -f option can force the
       deletion of this group.

SEE ALSO
       chfn(1), chsh(1), passwd(1), login.defs(5), gpasswd(8), groupadd(8), groupdel(8),
       groupmod(8), useradd(8), usermod(8).

System Management Commands		    06/24/2011				       USERDEL(8)
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