Usage of Linux userdel command

1. Command Introduction

The userdel (user delete) command is a system administrator command used to delete user accounts and related files.

In fact, the userdel command actually modifies the system's user account files /etc/passwd, /etc/shadow, and /etc/group files, which is consistent with the Linux system's idea of ​​"all operations are files."

It is worth noting that the userdel command will not usually delete a user account if there are processes related to the user to be deleted running. If you really need to delete it, you can terminate the user process first, and then execute the userdel command to delete it. But the userdel command also provides a parameter to deal with this situation, namely the -f option.

2. Command format

userdel [options] LOGIN

If no options are given, only the user account will be deleted without deleting the associated files.

3. Option Description

-f, --force
		Force delete user, even if the user is currently logged in -h, --help
	Display help information and launch -r, --remove
	When deleting a user, delete all files related to the user, such as deleting the home directory and mail pool -R, --root CHROOT_DIR
 	Apply changes in CHROOT_DIR directory and use the configuration file in CHROOT_DIR directory -Z, --selinux-user
	Remove all SELinux user mappings for a user

4. Common Examples

(1) Delete the user, but do not delete his home directory and files.

userdel tom

(2) Delete the user, home directory and mail pool.

userdel -r tom

Please do not use the -r option lightly, as it will delete all the user's files and directories when deleting the user. If there are important files in the user directory, please back them up before deleting.

(3) Force deletion of users.

userdel -f tom

The above is the detailed content of the use of linux userdel command. For more information about linux userdel command, please pay attention to other related articles on 123WORDPRESS.COM!