初期設定 : サービスの設定2021/11/04

	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 problem>
  abrt-oops.service                  loaded active running ABRT kernel log watc>
  abrt-xorg.service                  loaded active running ABRT Xorg log watche>
  abrtd.service                      loaded active running ABRT Automated Bug R>
  atd.service                        loaded active running Deferred execution s>
  
.....
.....

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

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

.....
.....

udisks2.service                            enabled         enabled
usb_modeswitch@.service                    static          -
user-runtime-dir@.service                  static          -
user@.service                              static          -
wpa_supplicant.service                     disabled        disabled

219 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