13.3. 列出系统服务

流程

• 要列出所有当前载入的服务单元，请输入：

  $ systemctl list-units --type service
  UNIT                     LOAD   ACTIVE SUB     DESCRIPTION
  abrt-ccpp.service        loaded active exited  Install ABRT coredump hook
  abrt-oops.service        loaded active running ABRT kernel log watcher
  abrtd.service            loaded active running ABRT Automated Bug Reporting Tool
  ----
  systemd-vconsole-setup.service loaded active exited  Setup Virtual Console
  tog-pegasus.service            loaded active running OpenPegasus CIM Server
  
  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.
  
  46 loaded units listed. Pass --all to see loaded but inactive units, too.
  To show all installed unit files use 'systemctl list-unit-files'

  默认情况下，systemctl list-units 命令只显示活跃的单位。对于每个服务单元文件，命令会显示：

  • UNIT ：其全名
  • LOAD ：是否载入了单元文件的信息
  • ACTIVE\ SUB ：其高级别和低级单元文件激活状态
  • DESCRIPTION: 一个较短的描述信息

• 要列出所有载入的单元，而不考虑其状态，使用 --all 或 -a 命令行选项输入以下命令：

  $ systemctl list-units --type service --all

• 要列出所有可用服务单元的状态（启用/禁用），请输入：

  $ systemctl list-unit-files --type service
  UNIT FILE                               STATE
  abrt-ccpp.service                       enabled
  abrt-oops.service                       enabled
  abrtd.service                           enabled
  ...
  wpa_supplicant.service                  disabled
  ypbind.service                          disabled
  
  208 unit files listed.

  对于每个服务单元，这个命令会显示：

  • UNIT FILE ：其全名
  • STATE ：是否启用或禁用服务单元