systemctl list-units --type service
returns:
UNIT LOAD ACTIVE SUB DESCRIPTION accounts-daemon.service loaded active running Accounts Service acpid.service loaded active running ACPI event daemon alsa-restore.service loaded active exited Save/Restore Sound Card State apparmor.service loaded active exited Load AppArmor profiles apport.service loaded active exited LSB: automatic crash report generation avahi-daemon.service loaded active running Avahi mDNS/DNS-SD Stack bluetooth.service loaded active running Bluetooth service ckb-next-daemon.service loaded active running Corsair Keyboards and Mice Daemon colord.service loaded active running Manage, Install and Generate Color Profiles console-setup.service loaded active exited Set console font and keymap cron.service loaded active running Regular background program processing daemon cups-browsed.service loaded active running Make remote CUPS printers available locally cups.service loaded active running CUPS Scheduler dbus.service loaded active running D-Bus System Message Bus expressvpn.service loaded active running ExpressVPN Daemon fwupd.service loaded active running Firmware update daemon gdm.service loaded active running GNOME Display Manager geoclue.service loaded active running Location Lookup Service irqbalance.service loaded active running irqbalance daemon kerneloops.service loaded active running Tool to automatically collect and submit kernel crash signatures keyboard-setup.service loaded active exited Set the console keyboard layout kmod-static-nodes.service loaded active exited Create List of Static Device Nodes lm-sensors.service loaded active exited Initialize hardware monitoring sensors ModemManager.service loaded active running Modem Manager networkd-dispatcher.service loaded active running Dispatcher daemon for systemd-networkd NetworkManager-wait-online.service loaded active exited Network Manager Wait Online NetworkManager.service loaded active running Network Manager openvpn.service loaded active exited OpenVPN service 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 power-profiles-daemon.service loaded active running Power Profiles daemon rsyslog.service loaded active running System Logging Service rtkit-daemon.service loaded active running RealtimeKit Scheduling Policy Service setvtrgb.service loaded active exited Set console scheme smartmontools.service loaded active running Self Monitoring and Reporting Technology (SMART) Daemon snapd.apparmor.service loaded active exited Load AppArmor profiles managed internally by snapd snapd.seeded.service loaded active exited Wait until snapd is fully seeded snapd.service loaded active running Snap Daemon switcheroo-control.service loaded active running Switcheroo Control Proxy service systemd-fsck@dev-disk-by\x2duuid-9CDB\x2dF840.service loaded active exited File System Check on /dev/disk/by-uuid/9CDB-F840 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 User Login Management systemd-modules-load.service loaded active exited Load Kernel Modules systemd-oomd.service loaded active running Userspace Out-Of-Memory (OOM) Killer 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-resolved.service loaded active running Network Name Resolution systemd-sysctl.service loaded active exited Apply Kernel Variables systemd-sysusers.service loaded active exited Create System Users systemd-timesyncd.service loaded active running Network Time Synchronization 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-trigger.service loaded active exited Coldplug All udev Devices systemd-udevd.service loaded active running Rule-based Manager for Device Events and Files systemd-update-utmp.service loaded active exited Record System Boot/Shutdown in UTMP systemd-user-sessions.service loaded active exited Permit User Sessions udisks2.service loaded active running Disk Manager ufw.service loaded active exited Uncomplicated firewall unattended-upgrades.service loaded active running Unattended Upgrades Shutdown upower.service loaded active running Daemon for power management user-runtime-dir@1000.service loaded active exited User Runtime Directory /run/user/1000 user@1000.service loaded active running User Manager for UID 1000 winbind.service loaded active running Samba Winbind Daemon 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. 68 loaded units listed. Pass --all to see loaded but inactive units, too. To show all installed unit files use 'systemctl list-unit-files'.