CentOS 8
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初期設定 : サービスの設定
2019/09/25
[1] サービスの状態は以下のようにして確認できます。
# 稼働中のサービスの一覧

[root@dlp ~]#
systemctl -t service

UNIT                            LOAD   ACTIVE SUB     DESCRIPTION
atd.service                     loaded active running Job spooling tools
auditd.service                  loaded active running Security Auditing Service
chronyd.service                 loaded active running NTP client/server
crond.service                   loaded active running Command Scheduler
dbus.service                    loaded active running D-Bus System Message Bus
.....
.....
user-runtime-dir@0.service      loaded active exited  /run/user/0 mount wrapper
user@0.service                  loaded active running User Manager for UID 0
vdo.service                     loaded active exited  VDO volume services

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.

45 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
arp-ethers.service                          disabled
atd.service                                 enabled
auditd.service                              enabled
autovt@.service                             enabled
blk-availability.service                    disabled
.....
.....
user-runtime-dir@.service                   static
user@.service                               static
vdo.service                                 enabled

181 unit files listed.
[2] 不要なサービスを止めるには以下のようにします。例として、smartd を停止し、システムの起動時に自動的に起動しないように設定しています。
[root@dlp ~]#
systemctl stop smartd

[root@dlp ~]#
systemctl disable smartd

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