userdel Command
Intermediate User Management man(1)Delete a user account
👁 118 views
📅 Updated: Apr 30, 2026
SYNTAX
userdel [OPTION]... USERNAME
What Does userdel Do?
userdel removes a user account from the system. It deletes the user entry from /etc/passwd and /etc/shadow, and optionally removes the home directory and mail spool.
userdel requires root privileges. Without -r, it only removes the user account, leaving home directory and files intact. With -r, it removes everything.
Before deleting a user, it is good practice to check for running processes (ps -u username) and transfer ownership of important files (find / -user username).
userdel requires root privileges. Without -r, it only removes the user account, leaving home directory and files intact. With -r, it removes everything.
Before deleting a user, it is good practice to check for running processes (ps -u username) and transfer ownership of important files (find / -user username).
Options & Flags
| Option | Description | Example |
|---|---|---|
| -r | Remove home directory and mail spool | sudo userdel -r olduser |
| -f | Force removal (even if user is logged in) | sudo userdel -f baduser |
| -Z | Remove SELinux user mapping | sudo userdel -Z user |
Practical Examples
#1 Remove user only
Removes the account but keeps home directory and files.
$ sudo userdel olduser#2 Remove user and files
Removes the account, home directory, and mail spool.
$ sudo userdel -r olduser#3 Force remove logged-in user
Force removes even if the user is currently logged in or has running processes.
$ sudo userdel -f baduser#4 Full cleanup procedure
Kills processes, removes user, and cleans up temp files.
$ sudo killall -u olduser; sudo userdel -r olduser; sudo find /tmp -user olduser -delete#5 Check before deleting
Check for running processes and owned files before deletion.
$ ps -u olduser; find /var/www -user olduserTips & Best Practices
Kill processes first: userdel may fail if the user has running processes. Kill them first: sudo killall -u username.
Backup before -r: userdel -r permanently deletes the home directory. Back up important data first: tar czf /backup/user.tar.gz /home/user.
Files remain without -r: Without -r, home directory files remain as orphaned (owned by deleted UID). Clean up with find / -nouser.
Frequently Asked Questions
How do I delete a user?
sudo userdel username removes the account. Add -r to also delete the home directory: sudo userdel -r username.
What happens to the user files?
Without -r, files in home directory remain (owned by the old UID number). With -r, home directory is deleted.
Why does userdel fail?
The user may have running processes. Kill them first: sudo killall -u username, then retry userdel.
Related Commands
More User Management Commands
Download User Management Cheat Sheet
View all 31 Linux command cheat sheets →Master Linux with Professional eBooks
Curated IT eBooks covering Linux, DevOps, Cloud, and more
Browse Books →