Initial Settings : Configure Services2025/10/30

	To enable or disable services, Configure like follows.
[1]	Display services list.

# the list of services that are active now
# to add [--all], display all included inactive services
# to add [--no-pager], do not use pagers like [less/more]

[root@dlp ~]#

systemctl -t service

  UNIT                                     LOAD   ACTIVE SUB     DESCRIPTION
  abrt-journal-core.service                loaded active running ABRT coredumpctl message creator
  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 Daemon
  atd.service                              loaded active running Deferred execution scheduler
  auditd.service                           loaded active running Security Audit Logging Service
  authselect-apply-changes.service         loaded active exited  Apply authselect changes
  chronyd.service                          loaded active running NTP client/server
  crond.service                            loaded active running Command Scheduler

.....
.....

Legend: 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.

56 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.

# list of all services

[root@dlp ~]#

systemctl list-unit-files -t service

UNIT FILE                                    STATE           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
audit-rules.service                          enabled         enabled
auditd.service                               enabled         enabled
auth-rpcgss-module.service                   static          -
authselect-apply-changes.service             enabled         enabled
autofs.service                               disabled        disabled

.....
.....

vmtoolsd.service                             enabled         enabled
winbind.service                              disabled        disabled
wpa_supplicant.service                       disabled        disabled

305 unit files listed.

[2]	Stop and turn OFF auto-start setting for a service if you don't need it. The example below means stopping and disable smartd service.

[root@dlp ~]#

systemctl disable --now smartd

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