This tutorial will guide you on how to perform a Enable/Disable Service on RedHat 8.1 Linux server.
1. List all the active and running services
[root@worldwidelinux ]# systemctl -t service
UNIT LOAD ACTIVE SUB DESCRIPTION
accounts-daemon.service loaded active running Accounts Service
alsa-state.service loaded active running Manage Sound Card State (restore and store)
atd.service loaded active running Job spooling tools
auditd.service loaded active running Security Auditing Service
avahi-daemon.service loaded active running Avahi mDNS/DNS-SD Stack
bluetooth.service loaded active running Bluetooth service
chronyd.service loaded active running NTP client/server
colord.service loaded active running Manage, Install and Generate Color Profiles
crond.service loaded active running Command Scheduler
cups.service loaded active running CUPS Scheduler
dbus.service loaded active running D-Bus System Message Bus
dracut-shutdown.service loaded active exited Restore /run/initramfs on shutdown
gdm.service loaded active running GNOME Display Manager
gssproxy.service loaded active running GSSAPI Proxy Daemon
import-state.service loaded active exited Import network configuration from initramfs
irqbalance.service loaded active running irqbalance daemon
iscsi-shutdown.service loaded active exited Logout off all iSCSI sessions on shutdown
kdump.service loaded active exited Crash recovery kernel arming
kmod-static-nodes.service loaded active exited Create list of required static device nodes for the current kernel
ksm.service loaded active exited Kernel Samepage Merging
ksmtuned.service loaded active running Kernel Samepage Merging (KSM) Tuning Daemon
ldconfig.service loaded active exited Rebuild Dynamic Linker Cache
libstoragemgmt.service loaded active running libstoragemgmt plug-in server daemon
lvm2-monitor.service loaded active exited Monitoring of LVM2 mirrors, snapshots etc. using dmeventd or progress polling
lvm2-pvscan@8:2.service loaded active exited LVM event activation on device 8:2
mcelog.service loaded active running Machine Check Exception Logging Daemon
ModemManager.service loaded active running Modem Manager
NetworkManager-wait-online.service loaded active exited Network Manager Wait Online
NetworkManager.service loaded active running Network Manager
nis-domainname.service loaded active exited Read and set NIS domainname from /etc/sysconfig/network
packagekit.service loaded active running PackageKit Daemon
plymouth-quit-wait.service loaded active exited Hold until boot process finishes up
plymouth-read-write.service loaded active exited Tell Plymouth To Write Out Runtime Data
plymouth-start.service loaded active exited Show Plymouth Boot Screen
polkit.service loaded active running Authorization Manager
rhsmcertd.service loaded active running Enable periodic update of entitlement certificates.
rngd-wake-threshold.service loaded active exited Hardware RNG Entropy Gatherer Wake threshold service
rngd.service loaded active running Hardware RNG Entropy Gatherer Daemon
rpc-statd-notify.service loaded active exited Notify NFS peers of a restart
rpcbind.service loaded active running RPC Bind
rsyslog.service loaded active running System Logging Service
rtkit-daemon.service loaded active running RealtimeKit Scheduling Policy Service
smartd.service loaded active running Self Monitoring and Reporting Technology (SMART) Daemon
sshd.service loaded active running OpenSSH server daemon
sssd.service loaded active running System Security Services Daemon
systemd-backlight@backlight:intel_backlight.service loaded active exited Load/Save Screen Backlight Brightness of backlight:intel_backlight
systemd-fsck-root.service loaded active exited File System Check on Root Device
systemd-fsck@dev-disk-by\x2duuid-9801a9a8\x2d16df\x2d40a8\x2d9f7a\x2dc45cb00bfe49.service loaded active exited File System Check on /dev/disk/by-uuid/9801a9a8-16df-40a8-9f7a-c45cb00bfe49
systemd-fsck@dev-mapper-rhel\x2dhome.service loaded active exited File System Check on /dev/mapper/rhel-home
systemd-hwdb-update.service loaded active exited Rebuild Hardware Database
systemd-journal-catalog-update.service loaded active exited Rebuild Journal Catalog
systemd-journal-flush.service loaded active exited Flush Journal to Persistent Storage
systemd-journald.service loaded active running Journal Service
systemd-logind.service loaded active running Login Service
systemd-machined.service loaded active running Virtual Machine and Container Registration Service
systemd-modules-load.service loaded active exited Load Kernel Modules
systemd-random-seed.service loaded active exited Load/Save Random Seed
systemd-remount-fs.service loaded active exited Remount Root and Kernel File Systems
systemd-sysctl.service loaded active exited Apply Kernel Variables
systemd-sysusers.service loaded active exited Create System Users
systemd-tmpfiles-setup-dev.service loaded active exited Create Static Device Nodes in /dev
systemd-tmpfiles-setup.service loaded active exited Create Volatile Files and Directories
systemd-udev-settle.service loaded active exited udev Wait for Complete Device Initialization
systemd-udev-trigger.service loaded active exited udev Coldplug all Devices
systemd-udevd.service loaded active running udev Kernel Device Manager
systemd-update-done.service loaded active exited Update is Completed
systemd-update-utmp.service loaded active exited Update UTMP about System Boot/Shutdown
systemd-user-sessions.service loaded active exited Permit User Sessions
tuned.service loaded active running Dynamic System Tuning Daemon
udisks2.service loaded active running Disk Manager
upower.service loaded active running Daemon for power management
user-runtime-dir@0.service loaded active exited /run/user/0 mount wrapper
user-runtime-dir@42.service loaded active exited /run/user/42 mount wrapper
user@0.service loaded active running User Manager for UID 0
user@42.service loaded active running User Manager for UID 42
vdo.service loaded active exited VDO volume services
wpa_supplicant.service loaded active running WPA supplicant
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.
77 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.
2. List all the services
Open terminal and login through root user then execute below command with your service name to enable a service.
[root@worldwidelinux ]# systemctl list-unit-files
Above command will give an output as 478 default service unit files and its STATE.
3. Enable services
Open terminal and login through root user then execute below command with your service name to enable a service.
Syntax: systemctl enable SERVICE_NAME
For Example, if you want to enable httpd service, please check the below command:
[root@worldwidelinux ]# systemctl enable httpd.service
4. Disable a service
Open terminal and login through root user then execute below command with your service name to disable a service.
Syntax: systemctl disable SERVICE_NAME
For Example, if you want to disable httpd service, please check the below command:
[root@worldwidelinux ]# systemctl disable httpd.service