userdel

Dit deel is nog niet vertaald. Je ziet de Engelse tekst.

Wat het doet

userdel removes the user from the account files, and the private group of the user if no other user has it as primary group.

Without -r the home folder stays. Files of the user in other places always stay: they then show a number instead of a name as owner. A new user with the same UID would own them, so find and clean them first.

Zo schrijf je het

userdel [OPTION]... LOGIN

Opties 6

Meest gebruikt

-r, --remove: Also remove the home folder and the mail spool.
-f, --force: Remove even when the user is logged in, and remove the group even if it is the primary group of another user. Dangerous.
-Z, --selinux-user: Remove the SELinux user mapping of the login.
-R, --root DIR: Work in this chroot folder.
-P, --prefix DIR: Use the files under this prefix folder.
-h, --help: Show help.

Voorbeelden 11

$ als gewone gebruiker# als root (of met sudo)

1Delete a user and the home folder
```
#userdel -r contractor1
```
The usual way for a lab or a test account.
2Delete only the account
```
#userdel olduser
```
The files in /home/olduser stay (for a backup).
3Find files of a user before you delete it
```
#find / -xdev -user olduser 2>/dev/null
```
Keep or move important files first.
4Find files without an owner after a delete
```
#find / -xdev -nouser 2>/dev/null
```
A security check: orphan files can be taken over by a new user with the same UID.
5Check that nobody uses the account
```
#who | grep olduser; pgrep -u olduser
```
userdel refuses when the user has processes (exit code 8).
6Stop the processes, then delete
```
#pkill -KILL -u olduser; userdel -r olduser
```
Only when you are sure the work is saved.
7Offboarding: lock first, delete later
```
#usermod -L -e 1 olduser
```
Wait some weeks, then userdel -r olduser.
8Remove the cron jobs of the user
```
#crontab -r -u olduser
```
userdel does not always remove them on every system.
9Archive the home folder before the delete
```
#tar -czf /root/olduser-home.tgz -C /home olduser && userdel -r olduser
```
Keep a copy for the legal hold period.
10Delete a service account
```
#userdel myapp
```
Its data in /var/lib/myapp stays; remove it yourself.
11Check that it is gone
```
#id olduser
id: 'olduser': no such user
```
The account is removed.

Let op

Files outside the home folder are not removed.
-f can remove a group that other users still use as primary group.

Bestanden

/etc/passwd, /etc/shadow, /etc/group, /etc/gshadow: The account files.
/etc/login.defs: USERGROUPS_ENAB decides if the private group is removed.

Exitcodes

`0`	Done.
`1`	Could not update the password file.
`2`	Wrong syntax.
`6`	The user does not exist.
`8`	The user is logged in.
`10`	Could not update the group file.
`12`	Could not remove the home folder.

`userdel`

Wat het doet

Zo schrijf je het

Opties 6

Voorbeelden 11

1Delete a user and the home folder

2Delete only the account

3Find files of a user before you delete it

4Find files without an owner after a delete

5Check that nobody uses the account

6Stop the processes, then delete

7Offboarding: lock first, delete later

8Remove the cron jobs of the user

9Archive the home folder before the delete

10Delete a service account

11Check that it is gone

Let op

Bestanden

Exitcodes

Volledige handleiding

Wat het doet

Zo schrijf je het

Opties 6

Voorbeelden 11

1Delete a user and the home folder

2Delete only the account

3Find files of a user before you delete it

4Find files without an owner after a delete

5Check that nobody uses the account

6Stop the processes, then delete

7Offboarding: lock first, delete later

8Remove the cron jobs of the user

9Archive the home folder before the delete

10Delete a service account

11Check that it is gone

Let op

Bestanden

Exitcodes

Verwante commando's

Gebruikt in deze lessen

Volledige handleiding

`userdel`