How to enable and disable services in CentOS 8
< Configure the network | Update the system >
You can view all the active services on the system with systemctl.
[root@localhost ~]# 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
.....
.....
[email protected] loaded active exited /run/user/0 mount wrapper
[email protected] 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'
You can list all of the services like this:
[root@localhost ~]# systemctl list-unit-files -t service
UNIT FILE STATE
arp-ethers.service disabled
atd.service enabled
auditd.service enabled
[email protected] enabled
blk-availability.service disabled
.....
.....
[email protected] static
[email protected] static
vdo.service enabled
181 unit files listed.
You can disable a service like this. In this example we stop firewalld.
[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# systemctl disable firewalld
To enable it again, we just use this:
[root@localhost ~]# systemctl start firewalld
[root@localhost ~]# systemctl enable firewalld
To check a status of a service do this:
[root@localhost ~]# systemctl status firewalld
* firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor pr
Active: active (running) since Tue 2019-10-29 22:14:39 EDT; 44min ago
Docs: man:firewalld(1)
Main PID: 705 (firewalld)
Tasks: 2 (limit: 4915)
CGroup: /system.slice/firewalld.service
└─705 /usr/libexec/platform-python -s /usr/sbin/firewalld --nofork