Table of Contents
In this article, I will take you through 6 Popular Methods to List All Running Services Under Systemd in Linux. If you are working or using Linux based systems from long time then you might be aware of System V which used runlevel scripts to run programs at specified Run Level. Now we have more advanced Systemd Managed Services which uses Unit, Service and targets instead of using runlevels. Systemd provides many new features over System V and upstart like it is event driven which means it can monitor and respond to any new System Events. It also provides the ability to respawn processes.
Important Systemd Terminologies
Units : Each configurable item in Systemd is a Unit File. Configuration of Unit File can be found in three places: /etc/systemd/system, /run/systemd/system and /lib/systemd/system.
Services : It is basically a type of Unit File in Systemd which works as a daemon that can be stopped and started. This is similar to Service in System V. It’s name ends with .service.
Targets : It is also a type of Systemd Unit file which groups service dependency together. It’s name end with .target.
List All Running Services Under Systemd in Linux
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Method 1: How to List All Units Under Systemd in Linux
If you want to List all units under Systemd in Linux then you need to simply use systemctl command as shown below.
[root@localhost ~]# systemctl UNIT LOAD ACTIVE SUB DESCRIPTION proc-sys-fs-binfmt_misc.automount loaded active running Arbitrary Executable File Formats File System Automount Point sys-devices-pci0000:00-0000:00:01.1-ata2-host1-target1:0:0-1:0:0:0-block-sr0.device loaded active plugged VBOX_CD-ROM list running services sys-devices-pci0000:00-0000:00:03.0-net-enp0s3.device loaded active plugged 82540EM Gigabit Ethernet Controller (PRO/1000 MT Desktop Adapter) sys-devices-pci0000:00-0000:00:05.0-sound-card0.device loaded active plugged 82801AA AC'97 Audio Controller sys-devices-pci0000:00-0000:00:0d.0-ata3-host2-target2:0:0-2:0:0:0-block-sda-sda1.device loaded active plugged VBOX_HARDDISK 1 sys-devices-pci0000:00-0000:00:0d.0-ata3-host2-target2:0:0-2:0:0:0-block-sda-sda2.device loaded active plugged VBOX_HARDDISK 2 sys-devices-pci0000:00-0000:00:0d.0-ata3-host2-target2:0:0-2:0:0:0-block-sda.device loaded active plugged VBOX_HARDDISK sys-devices-pci0000:00-0000:00:0d.0-ata4-host3-target3:0:0-3:0:0:0-block-sdb-sdb1.device loaded active plugged VBOX_HARDDISK 1 sys-devices-pci0000:00-0000:00:0d.0-ata4-host3-target3:0:0-3:0:0:0-block-sdb.device loaded active plugged VBOX_HARDDISK sys-devices-pci0000:00-0000:00:0d.0-ata5-host4-target4:0:0-4:0:0:0-block-sdc-sdc1.device loaded active plugged VBOX_HARDDISK 1 sys-devices-pci0000:00-0000:00:0d.0-ata5-host4-target4:0:0-4:0:0:0-block-sdc.device loaded active plugged VBOX_HARDDISK sys-devices-platform-serial8250-tty-ttyS0.device loaded active plugged /sys/devices/platform/serial8250/tty/ttyS0 sys-devices-platform-serial8250-tty-ttyS1.device loaded active plugged /sys/devices/platform/serial8250/tty/ttyS1 sys-devices-platform-serial8250-tty-ttyS2.device loaded active plugged /sys/devices/platform/serial8250/tty/ttyS2 sys-devices-platform-serial8250-tty-ttyS3.device loaded active plugged /sys/devices/platform/serial8250/tty/ttyS3 sys-devices-virtual-block-dm\x2d0.device loaded active plugged /sys/devices/virtual/block/dm-0 sys-devices-virtual-block-dm\x2d1.device loaded active plugged /sys/devices/virtual/block/dm-1 sys-devices-virtual-net-virbr0.device loaded active plugged /sys/devices/virtual/net/virbr0 sys-devices-virtual-net-virbr0\x2dnic.device loaded active plugged /sys/devices/virtual/net/virbr0-nic sys-module-configfs.device loaded active plugged /sys/module/configfs list running services sys-subsystem-net-devices-enp0s3.device loaded active plugged 82540EM Gigabit Ethernet Controller (PRO/1000 MT Desktop Adapter) sys-subsystem-net-devices-virbr0.device loaded active plugged /sys/subsystem/net/devices/virbr0 list running services sys-subsystem-net-devices-virbr0\x2dnic.device loaded active plugged /sys/subsystem/net/devices/virbr0-nic list running services -.mount loaded active mounted / boot.mount loaded active mounted /boot list running services dev-hugepages.mount loaded active mounted Huge Pages File System dev-mqueue.mount loaded active mounted POSIX Message Queue File System proc-sys-fs-binfmt_misc.mount loaded active mounted Arbitrary Executable File Formats File System run-user-0.mount loaded active mounted /run/user/0 list running services sys-kernel-config.mount loaded active mounted Configuration File System sys-kernel-debug.mount loaded active mounted Debug File System list running services var-lib-nfs-rpc_pipefs.mount loaded active mounted RPC Pipe File System list running services systemd-ask-password-plymouth.path loaded active waiting Forward Password Requests to Plymouth Directory Watch systemd-ask-password-wall.path loaded active waiting Forward Password Requests to Wall Directory Watch session-1.scope loaded active running Session 1 of user root auditd.service loaded active running Security Auditing Service blk-availability.service loaded active exited Availability of block devices
Method 2: How to List All Services Under Systemd in Linux
If you want to List All Services Under systemd in Linux then you need to use systemctl list-units --type=service command as shown below.
[root@localhost ~]# systemctl list-units --type=service UNIT LOAD ACTIVE SUB DESCRIPTION auditd.service loaded active running Security Auditing Service blk-availability.service loaded active exited Availability of block devices 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 firewalld.service loaded active running firewalld - dynamic firewall daemon getty@tty1.service loaded active running Getty on tty1 list running services gssproxy.service loaded active running GSSAPI Proxy Daemon list running services iscsi-shutdown.service loaded active exited Logout off all iSCSI sessions on shutdown kdump.service loaded active exited Crash recovery kernel arming list running services 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 list running services ksmtuned.service loaded active running Kernel Samepage Merging (KSM) Tuning Daemon libvirtd.service loaded active running Virtualization daemon list running services lvm2-lvmetad.service loaded active running LVM2 metadata daemon list running services lvm2-monitor.service loaded active exited Monitoring of LVM2 mirrors, snapshots etc. using dmeventd or progress polling lvm2-pvscan@8:17.service loaded active exited LVM2 PV scan on device 8:17 list running services lvm2-pvscan@8:2.service loaded active exited LVM2 PV scan on device 8:2 list running services mysqld.service loaded active running MySQL Community Server list running services netcf-transaction.service loaded active exited Rollback uncommitted netcf network config change transactions network.service loaded active exited LSB: Bring up/down networking polkit.service loaded active running Authorization Manager rhel-dmesg.service loaded active exited Dump dmesg to /var/log/dmesg rhel-domainname.service loaded active exited Read and set NIS domainname from /etc/sysconfig/network rhel-import-state.service loaded active exited Import network configuration from initramfs rhel-readonly.service loaded active exited Configure read-only root support rpcbind.service loaded active running RPC bind service rsyslog.service loaded active running System Logging Service sendmail.service loaded active running Sendmail Mail Transport Agent sm-client.service loaded active running Sendmail Mail Transport Client sshd.service loaded active running OpenSSH server daemon 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-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-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-utmp.service loaded active exited Update UTMP about System Boot/Shutdown systemd-user-sessions.service loaded active exited Permit User Sessions systemd-vconsole-setup.service loaded active exited Setup Virtual Console tuned.service loaded active running Dynamic System Tuning Daemon vsftpd.service loaded active running Vsftpd ftp daemon 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. 47 loaded units listed. Pass --all to see loaded but inactive units, too. To show all installed unit files use 'systemctl list-unit-files'.
list-units: List known units (subject to limitations specified with -t). More information can be checked on Systemctl Man Page.
Method 3: How to List All Running Services Under Systemd in Linux
If you want to List all running services under Systemd in Linux then you need to use systemctl list-units --type=service --state=running command as shown below.
[root@localhost ~]# systemctl list-units --type=service --state=running UNIT LOAD ACTIVE SUB DESCRIPTION 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 firewalld.service loaded active running firewalld - dynamic firewall daemon getty@tty1.service loaded active running Getty on tty1 gssproxy.service loaded active running GSSAPI Proxy Daemon ksmtuned.service loaded active running Kernel Samepage Merging (KSM) Tuning Daemon libvirtd.service loaded active running Virtualization daemon lvm2-lvmetad.service loaded active running LVM2 metadata daemon mysqld.service loaded active running MySQL Community Server polkit.service loaded active running Authorization Manager rpcbind.service loaded active running RPC bind service rsyslog.service loaded active running System Logging Service sendmail.service loaded active running Sendmail Mail Transport Agent sm-client.service loaded active running Sendmail Mail Transport Client sshd.service loaded active running OpenSSH server daemon systemd-journald.service loaded active running Journal Service systemd-logind.service loaded active running Login Service systemd-udevd.service loaded active running udev Kernel Device Manager tuned.service loaded active running Dynamic System Tuning Daemon vsftpd.service loaded active running Vsftpd ftp daemon 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. 22 loaded units listed. Pass --all to see loaded but inactive units, too. To show all installed unit files use 'systemctl list-unit-files'.
Method 4: How to List All Exited Services Under Systemd in Linux
If you want to List all exited services under Systemd in Linux then you need to use systemctl list-units --type=service --state=exited command as shown below.
[root@localhost ~]# systemctl list-units --type=service --state=exited UNIT LOAD ACTIVE SUB DESCRIPTION blk-availability.service loaded active exited Availability of block devices 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 lvm2-monitor.service loaded active exited Monitoring of LVM2 mirrors, snapshots etc. using dmeventd or progress polling lvm2-pvscan@8:17.service loaded active exited LVM2 PV scan on device 8:17 lvm2-pvscan@8:2.service loaded active exited LVM2 PV scan on device 8:2 netcf-transaction.service loaded active exited Rollback uncommitted netcf network config change transactions network.service loaded active exited LSB: Bring up/down networking rhel-dmesg.service loaded active exited Dump dmesg to /var/log/dmesg rhel-domainname.service loaded active exited Read and set NIS domainname from /etc/sysconfig/network rhel-import-state.service loaded active exited Import network configuration from initramfs rhel-readonly.service loaded active exited Configure read-only root support systemd-journal-flush.service loaded active exited Flush Journal to Persistent Storage 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-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-update-utmp.service loaded active exited Update UTMP about System Boot/Shutdown systemd-user-sessions.service loaded active exited Permit User Sessions systemd-vconsole-setup.service loaded active exited Setup Virtual Console 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. 25 loaded units listed. Pass --all to see loaded but inactive units, too. To show all installed unit files use 'systemctl list-unit-files'.
Method 5: How to List all the Service type Unit Files under Systemd in Linux
If you want to list all the Unit Files and its state under Systemd in Linux then you need to use systemctl list-unit-files --type=service command as shown below.
[root@localhost ~]# systemctl list-unit-files --type=service UNIT FILE STATE anaconda-direct.service static anaconda-nm-config.service static anaconda-noshell.service static anaconda-pre.service static anaconda-shell@.service static anaconda-sshd.service static anaconda-tmux@.service static anaconda.service static arp-ethers.service disabled auditd.service enabled auth-rpcgss-module.service static autovt@.service enabled blk-availability.service disabled brandbot.service static brltty.service disabled canberra-system-bootup.service disabled canberra-system-shutdown-reboot.service disabled canberra-system-shutdown.service disabled chrony-dnssrv@.service static chrony-wait.service disabled chronyd.service enabled console-getty.service disabled console-shell.service disabled container-getty@.service static cpupower.service disabled crond.service enabled dbus-org.fedoraproject.FirewallD1.service enabled
Method 6: How to Check the Status of any Specific Running Services in Linux
If you want to check the status of any Specific Running Services in Linux then you need to use below Systemctl command. Here we are checking the status of httpd Service using systemctl status httpd command.
[root@localhost ~]# systemctl status httpd ● httpd.service - The Apache HTTP Server Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled; vendor preset: disabled) Active: active (running) since Sat 2020-08-29 03:56:30 EDT; 24s ago Docs: man:httpd(8) man:apachectl(8) Main PID: 16205 (httpd) Status: "Total requests: 0; Current requests/sec: 0; Current traffic: 0 B/sec" Tasks: 6 CGroup: /system.slice/httpd.service ├─16205 /usr/sbin/httpd -DFOREGROUND ├─16206 /usr/sbin/httpd -DFOREGROUND ├─16207 /usr/sbin/httpd -DFOREGROUND ├─16208 /usr/sbin/httpd -DFOREGROUND ├─16209 /usr/sbin/httpd -DFOREGROUND └─16210 /usr/sbin/httpd -DFOREGROUND Aug 29 03:56:30 localhost systemd[1]: Starting The Apache HTTP Server... Aug 29 03:56:30 localhost httpd[16205]: AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using ::1. Set the 'ServerNa...is message Aug 29 03:56:30 localhost systemd[1]: Started The Apache HTTP Server. Hint: Some lines were ellipsized, use -l to show in full.
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