初期設定 : サービスの設定2022/05/13

	サービスの状態の確認や有効化/無効化は以下のように実行可能です。
[1]	サービスの一覧を表示します。

# 稼働中のサービスの一覧
# [--all] 付加で停止中も含めて全サービスをリスト
# [--no-pager] 付加で [less/more] 等の pager に渡さない

[root@dlp ~]#

systemctl -t service

  UNIT                        LOAD   ACTIVE SUB     DESCRIPTION
  abrt-journal-core.service   loaded active running Creates ABRT problems from …
  abrt-oops.service           loaded active running ABRT kernel log watcher
  abrt-xorg.service           loaded active running ABRT Xorg log watcher
  abrtd.service               loaded active running ABRT Automated Bug Reportin…
  atd.service                 loaded active running Deferred execution scheduler
  auditd.service              loaded active running Security Auditing Service

.....
.....

  systemd-zram-setup@zram0.s… loaded active exited  Create swap on /dev/zram0
  user-runtime-dir@0.service  loaded active exited  User Runtime Directory /run…
  user@0.service              loaded active running User Manager for UID 0

LOAD   = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB    = The low-level unit activation state, values depend on unit type.
54 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.

# 全サービスの一覧

[root@dlp ~]#

systemctl list-unit-files -t service

UNIT FILE                                  STATE           VENDOR PRESET
abrt-journal-core.service                  enabled         enabled
abrt-oops.service                          enabled         enabled
abrt-pstoreoops.service                    disabled        disabled
abrt-vmcore.service                        enabled         enabled
abrt-xorg.service                          enabled         enabled
abrtd.service                              enabled         enabled
arp-ethers.service                         disabled        disabled
atd.service                                enabled         enabled
auditd.service                             enabled         enabled

.....
.....

user-runtime-dir@.service                  static          -
user@.service                              static          -
wpa_supplicant.service                     disabled        disabled

222 unit files listed.

[2]	不要なサービスを停止には以下のように実行します。例として、[smartd] を停止して、システムの起動時に自動的に起動しないように設定します。

[root@dlp ~]#

systemctl disable --now smartd