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As a system administrator, you are probably dealing with a lot of services every day. On Linux, services are used for many different purposes.
In this post, you will learn how you to list all services on your Linux machine.
List Services using systemctl
The easiest way to list services on Linux, when you are on a systemd system, is to use the systemctl command followed by list-units. You can specify the option in order to restrict the results to services only.
systemctl list-units --type=service --all[root@ct7 ~]# systemctl list-units --type=service --all
UNIT LOAD ACTIVE SUB DESCRIPTION
auditd.service loaded active running Security Auditing Service
chronyd.service loaded active running NTP client/server
● cloud-init-local.service not-found inactive dead cloud-init-local.service
cpupower.service loaded inactive dead Configure CPU power related settings
crond.service loaded active running Command Scheduler
dbus.service loaded active running D-Bus System Message Bus
● display-manager.service not-found inactive dead display-manager.service
dm-event.service loaded inactive dead Device-mapper event daemon
dracut-cmdline.service loaded inactive dead dracut cmdline hook
...
...
NetworkManager.service loaded active running Network Manager
● ntpd.service not-found inactive dead ntpd.service
● ntpdate.service not-found inactive dead ntpdate.service
plymouth-quit-wait.service loaded inactive dead Wait for Plymouth Boot Screen to Quit
plymouth-quit.service loaded inactive dead Terminate Plymouth Boot Screen
plymouth-read-write.service loaded inactive dead Tell Plymouth To Write Out Runtime Data
plymouth-start.service loaded inactive dead Show Plymouth Boot Screen
lines 1-47List Services by State
In some cases, you may only be interested in services that have failed. For that, you can specify the state that you are looking for as an option of the systemctl command.
###Services in single state
systemctl list-units --state=<state>
###Services in multiple states
systemctl list-units --state=<state1>,<state2>Where the state can be one of the following values: active, inactive, activating, deactivating, failed, not-found or dead.
For example, if we are only interested in active services, we are going to run the following command:
systemctl list-units --state=active# systemctl list-units --state=active
boot.mount loaded active mounted /boot
dev-hugepages.mount loaded active mounted Huge Pages File System
dev-mqueue.mount loaded active mounted POSIX Message Queue File System
home.mount loaded active mounted /home
run-user-0.mount loaded active mounted /run/user/0
sys-fs-fuse-connections.mount loaded active mounted FUSE Control File System
sys-kernel-config.mount loaded active mounted Configuration File System
sys-kernel-debug.mount loaded active mounted Debug File System
session-1.scope loaded active running Session 1 of user root
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
...List All Service Files using list-unit-files
Finally, if you are interested in loaded, installed, disabled as well as enabled service files, there is another command that might be pretty handy.
# systemctl list-unit-files --type=service
UNIT FILE STATE
auditd.service enabled
[email protected] enabled
blk-availability.service disabled
brandbot.service static
[email protected] static
chrony-wait.service disabled
chronyd.service enabled
console-getty.service disabled
console-shell.service disabled
[email protected] static
cpupower.service disabled
crond.service enabled
dbus-org.fedoraproject.FirewallD1.service enabled
dbus-org.freedesktop.hostname1.service static
dbus-org.freedesktop.import1.service staticConclusion
In this tutorial, you learnt how you can easily list services on a Linux system.
