Initial Settings : Services2018/05/07

[1]	It's possible to display services' status like follows.

# the list of services which are active

[root@dlp ~]#

systemctl -t service

UNIT                            LOAD   ACTIVE SUB     DESCRIPTION
abrt-journal-core.service       loaded active running Creates ABRT problems fro
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 Report
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
dracut-shutdown.service         loaded active exited  Restore /run/initramfs on
.....
.....

# the list of all services

[root@dlp ~]#

systemctl list-unit-files -t service

UNIT FILE                                   STATE
abrt-ccpp.service                           disabled
abrt-journal-core.service                   enabled
abrt-oops.service                           enabled
abrt-pstoreoops.service                     disabled
abrt-vmcore.service                         enabled
abrt-xorg.service                           enabled
abrtd.service                               enabled
arp-ethers.service                          disabled
atd.service                                 enabled
auditd.service                              enabled
auth-rpcgss-module.service                  static
.....
.....

[2]	Stop and turn OFF auto-start setting for a service if you don'd need it. (it's smartd as an example below)

[root@dlp ~]#

systemctl stop smartd

[root@dlp ~]#

systemctl disable smartd

[3]	There are some SysV services yet. Those are controled by chkconfig like follows.

[root@dlp ~]#

chkconfig --list


Note: This output shows SysV services only and does not include native
      systemd services. SysV configuration data might be overridden by native
      systemd configuration.

      If you want to list systemd services use 'systemctl list-unit-files'.
      To see services enabled on particular target use
      'systemctl list-dependencies [target]'.

netconsole      0:off   1:off   2:off   3:off   4:off   5:off   6:off
network         0:off   1:off   2:off   3:off   4:off   5:off   6:off

# for exmaple, turn OFF auto-start setting for netconsole

[root@dlp ~]#

chkconfig netconsole off

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