Provided by: passwd_4.16.0-7ubuntu1_amd64 
名称
userdel - 删除用户账户和相关文件
大纲
userdel [options] LOGIN
描述
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.
选项
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
显示帮助信息并退出。
-r, --remove
用户主目录中的文件将随用户主目录和用户邮箱一起删除。在其它文件系统中的文件必须手动搜索并删除。
The mail spool is defined by the MAIL_DIR variable in the login.defs file.
-R, --root CHROOT_DIR
Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR
directory. Only absolute paths are supported.
-P, --prefix PREFIX_DIR
Apply changes in the PREFIX_DIR directory and use the configuration files from the PREFIX_DIR
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.
-Z, --selinux-user
移除用户登录的所有 SELinux 用户映射。
配置文件
The following configuration variables in /etc/login.defs change the behavior of this tool:
文件
/etc/group 组账户信息。 /etc/login.defs Shadow 密码套件配置。 /etc/passwd 用户账户信息。 /etc/shadow 安全用户账户信息。 /etc/shadow-maint/userdel-pre.d/*, /etc/shadow-maint/userdel-post.d/* Run-part files to execute during user deletion. The environment variable ACTION will be populated with userdel and SUBJECT 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. /etc/subgid Per user subordinate group IDs. /etc/subuid Per user subordinate user IDs.
退出值
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.
您应该手动检查所以文件系统，以确保没有遗留此用户的文件。
您不能在 NIS 客户端上移除任何 NIS 属性。这必须在 NIS 服务器上执行。
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.
参见
chfn(1), chsh(1), passwd(1), login.defs(5), gpasswd(8), groupadd(8), groupdel(8), groupmod(8), subgid(5), subuid(5), useradd(8), usermod(8).