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+'\" t
+.\"     Title: userdel
+.\"    Author: Julianne Frances Haugh
+.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
+.\"      Date: 11/08/2022
+.\"    Manual: System Management Commands
+.\"    Source: shadow-utils 4.13
+.\"  Language: English
+.\"
+.TH "USERDEL" "8" "11/08/2022" "shadow\-utils 4\&.13" "System Management Commands"
+.\" -----------------------------------------------------------------
+.\" * Define some portability stuff
+.\" -----------------------------------------------------------------
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" http://bugs.debian.org/507673
+.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.ie \n(.g .ds Aq \(aq
+.el       .ds Aq '
+.\" -----------------------------------------------------------------
+.\" * set default formatting
+.\" -----------------------------------------------------------------
+.\" disable hyphenation
+.nh
+.\" disable justification (adjust text to left margin only)
+.ad l
+.\" -----------------------------------------------------------------
+.\" * MAIN CONTENT STARTS HERE *
+.\" -----------------------------------------------------------------
+.SH "NAME"
+userdel \- delete a user account and related files
+.SH "SYNOPSIS"
+.HP \w'\fBuserdel\fR\ 'u
+\fBuserdel\fR [options] \fILOGIN\fR
+.SH "DESCRIPTION"
+.PP
+The
+\fBuserdel\fR
+command modifies the system account files, deleting all entries that refer to the user name
+\fILOGIN\fR\&. The named user must exist\&.
+.SH "OPTIONS"
+.PP
+The options which apply to the
+\fBuserdel\fR
+command are:
+.PP
+\fB\-f\fR, \fB\-\-force\fR
+.RS 4
+This option forces the removal of the user account, even if the user is still logged in\&. It also forces
+\fBuserdel\fR
+to remove the user\*(Aqs 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
+\fBUSERGROUPS_ENAB\fR
+is defined to
+\fIyes\fR
+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\&.
+.sp
+\fINote:\fR
+This option is dangerous and may leave your system in an inconsistent state\&.
+.RE
+.PP
+\fB\-h\fR, \fB\-\-help\fR
+.RS 4
+Display help message and exit\&.
+.RE
+.PP
+\fB\-r\fR, \fB\-\-remove\fR
+.RS 4
+Files in the user\*(Aqs home directory will be removed along with the home directory itself and the user\*(Aqs mail spool\&. Files located in other file systems will have to be searched for and deleted manually\&.
+.sp
+The mail spool is defined by the
+\fBMAIL_DIR\fR
+variable in the
+login\&.defs
+file\&.
+.RE
+.PP
+\fB\-R\fR, \fB\-\-root\fR\ \&\fICHROOT_DIR\fR
+.RS 4
+Apply changes in the
+\fICHROOT_DIR\fR
+directory and use the configuration files from the
+\fICHROOT_DIR\fR
+directory\&. Only absolute paths are supported\&.
+.RE
+.PP
+\fB\-P\fR, \fB\-\-prefix\fR\ \&\fIPREFIX_DIR\fR
+.RS 4
+Apply changes in the
+\fIPREFIX_DIR\fR
+directory and use the configuration files from the
+\fIPREFIX_DIR\fR
+directory\&. This option does not chroot and is intended for preparing a cross\-compilation target\&. Some limitations: NIS and LDAP users/groups are not verified\&. PAM authentication is using the host files\&. No SELINUX support\&.
+.RE
+.PP
+\fB\-Z\fR, \fB\-\-selinux\-user\fR
+.RS 4
+Remove any SELinux user mapping for the user\*(Aqs login\&.
+.RE
+.SH "CONFIGURATION"
+.PP
+The following configuration variables in
+/etc/login\&.defs
+change the behavior of this tool:
+.PP
+\fBMAIL_DIR\fR (string)
+.RS 4
+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\&. The parameter CREATE_MAIL_SPOOL in
+/etc/default/useradd
+determines whether the mail spool should be created\&.
+.RE
+.PP
+\fBMAIL_FILE\fR (string)
+.RS 4
+Defines the location of the users mail spool files relatively to their home directory\&.
+.RE
+.PP
+The
+\fBMAIL_DIR\fR
+and
+\fBMAIL_FILE\fR
+variables are used by
+\fBuseradd\fR,
+\fBusermod\fR, and
+\fBuserdel\fR
+to create, move, or delete the user\*(Aqs mail spool\&.
+.PP
+If
+\fBMAIL_CHECK_ENAB\fR
+is set to
+\fIyes\fR, they are also used to define the
+\fBMAIL\fR
+environment variable\&.
+.PP
+\fBMAX_MEMBERS_PER_GROUP\fR (number)
+.RS 4
+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)\&.
+.sp
+The default value is 0, meaning that there are no limits in the number of members in a group\&.
+.sp
+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\&.
+.sp
+If you need to enforce such limit, you can use 25\&.
+.sp
+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\&.
+.RE
+.PP
+\fBUSERDEL_CMD\fR (string)
+.RS 4
+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)\&.
+.sp
+The return code of the script is not taken into account\&.
+.sp
+Here is an example script, which removes the user\*(Aqs cron, at and print jobs:
+.sp
+.if n \{\
+.RS 4
+.\}
+.nf
+#! /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 \e;
+
+# Remove print jobs\&.
+lprm $1
+
+# All done\&.
+exit 0
+      
+.fi
+.if n \{\
+.RE
+.\}
+.sp
+.RE
+.PP
+\fBUSERGROUPS_ENAB\fR (boolean)
+.RS 4
+Enable setting of the umask group bits to be the same as owner bits (examples: 022 \-> 002, 077 \-> 007) for non\-root users, if the uid is the same as gid, and username is the same as the primary group name\&.
+.sp
+If set to
+\fIyes\fR,
+\fBuserdel\fR
+will remove the user\*(Aqs group if it contains no more members, and
+\fBuseradd\fR
+will create by default a group with the name of the user\&.
+.RE
+.SH "FILES"
+.PP
+/etc/group
+.RS 4
+Group account information\&.
+.RE
+.PP
+/etc/login\&.defs
+.RS 4
+Shadow password suite configuration\&.
+.RE
+.PP
+/etc/passwd
+.RS 4
+User account information\&.
+.RE
+.PP
+/etc/shadow
+.RS 4
+Secure user account information\&.
+.RE
+.PP
+/etc/shadow\-maint/userdel\-pre\&.d/*, /etc/shadow\-maint/userdel\-post\&.d/*
+.RS 4
+Run\-part files to execute during user deletion\&. The environment variable
+\fBACTION\fR
+will be populated with
+\fBuserdel\fR
+and
+\fBSUBJECT\fR
+with the username\&.
+userdel\-pre\&.d
+will be executed prior to any user deletion\&.
+userdel\-post\&.d
+will execute after user deletion\&. If a script exits non\-zero then execution will terminate\&.
+.RE
+.PP
+/etc/subgid
+.RS 4
+Per user subordinate group IDs\&.
+.RE
+.PP
+/etc/subuid
+.RS 4
+Per user subordinate user IDs\&.
+.RE
+.SH "EXIT VALUES"
+.PP
+The
+\fBuserdel\fR
+command exits with the following values:
+.PP
+\fI0\fR
+.RS 4
+success
+.RE
+.PP
+\fI1\fR
+.RS 4
+can\*(Aqt update password file
+.RE
+.PP
+\fI2\fR
+.RS 4
+invalid command syntax
+.RE
+.PP
+\fI6\fR
+.RS 4
+specified user doesn\*(Aqt exist
+.RE
+.PP
+\fI8\fR
+.RS 4
+user currently logged in
+.RE
+.PP
+\fI10\fR
+.RS 4
+can\*(Aqt update group file
+.RE
+.PP
+\fI12\fR
+.RS 4
+can\*(Aqt remove home directory
+.RE
+.SH "CAVEATS"
+.PP
+\fBuserdel\fR
+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\*(Aqs password or account and remove the account later\&. The
+\fB\-f\fR
+option can force the deletion of this account\&.
+.PP
+You should manually check all file systems to ensure that no files remain owned by this user\&.
+.PP
+You may not remove any NIS attributes on a NIS client\&. This must be performed on the NIS server\&.
+.PP
+If
+\fBUSERGROUPS_ENAB\fR
+is defined to
+\fIyes\fR
+in
+/etc/login\&.defs,
+\fBuserdel\fR
+will delete the group with the same name as the user\&. To avoid inconsistencies in the passwd and group databases,
+\fBuserdel\fR
+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
+\fB\-f\fR
+option can force the deletion of this group\&.
+.SH "SEE ALSO"
+.PP
+\fBchfn\fR(1),
+\fBchsh\fR(1),
+\fBpasswd\fR(1),
+\fBlogin.defs\fR(5),
+\fBgpasswd\fR(8),
+\fBgroupadd\fR(8),
+\fBgroupdel\fR(8),
+\fBgroupmod\fR(8),
+\fBsubgid\fR(5), \fBsubuid\fR(5),
+\fBuseradd\fR(8),
+\fBusermod\fR(8)\&.