【Ubuntu】deluserでユーザー削除｜設定ファイルとオプション解説

1
cat /etc/deluser.conf

1
# /etc/deluser.conf: `deluser' configuration.
2

3
# Remove home directory and mail spool when user is removed
4
REMOVE_HOME = 0
5

6
# Remove all files on the system owned by the user to be removed
7
REMOVE_ALL_FILES = 0
8

9
# Backup files before removing them. This options has only an effect if
10
# REMOVE_HOME or REMOVE_ALL_FILES is set.
11
BACKUP = 0
12

13
# target directory for the backup file
14
BACKUP_TO = "."
15

16
# delete a group even there are still users in this group
17
ONLY_IF_EMPTY = 0
18

19
# exclude these filesystem types when searching for files of a user to backup
20
EXCLUDE_FSTYPES = "(proc|sysfs|usbfs|devpts|tmpfs|afs)"

1
sudo deluser [削除したいユーザ名]

1
sudo deluser --remove-home [削除したいユーザ名]

1
sudo deluser --remove-home --backup [削除したいユーザ名]

1
sudo deluser --remove-home --backup-to [バックアップディレクトリ] [削除したいユーザ名]

1
sudo deluser --remove-all-files [削除したいユーザ名]

1
sudo deluser --remove-all-files --backup [削除したいユーザ名]

1
sudo deluser --remove-all-files --backup-to [バックアップディレクトリ] [削除したいユーザ名]

1
deluser -help

1
sudo deluser test-user

1
Removing user `test-user' ...
2
Warning: group `test-user' has no more members.
3
Done.

1
# passwdファイル確認
2
$ cat /etc/passwd | grep test-user
3
test-user:x:1001:1001:,,,:/home/test-user:/bin/bash
4

5
# ホームディレクトリ確認
6
$ ls -ld /home/test-user
7
drwxr-x--- 2 test-user test-user 4096 Aug 31 21:23 /home/test-user
8

9
# ログイン確認
10
$ sudo su - test-user
11
$ whoami
12
test-user

1
# passwdファイル確認（結果なし）
2
$ cat /etc/passwd | grep test-user
3
$
4

5
# ホームディレクトリ確認（未削除のためディレクトリあり）
6
$ ls -ld /home/test-user
7
drwxr-x--- 2 1001 1001 4096 Aug 31 21:26 /home/test-user
8

9
# ログイン確認（不可）
10
$ sudo su - test-user
11
su: user test-user does not exist or the user entry does not contain all the required fields

1
$ sudo deluser test-user
2
Removing user `test-user' ...
3
Warning: group `test-user' has no more members.
4
userdel: user test-user is currently used by process 13372
5
/usr/sbin/deluser: `/sbin/userdel test-user' returned error code 8. Exiting.

1
$ ps -f 13372
2
UID          PID    PPID  C STIME TTY      STAT   TIME CMD
3
test-us+   13372       1  0 21:31 ?        Ss     0:00 /lib/systemd/systemd --user
4
$ sudo kill 13372
5
$
6
$ ps -f 13372
7
UID          PID    PPID  C STIME TTY      STAT   TIME CMD
8
$