systemctl list-units --type=service --state=running
  UNIT                          LOAD   ACTIVE SUB     DESCRIPTION
  adb.service                   loaded active running Android Debug Bridge Daemon
  bluetooth.service             loaded active running Bluetooth service
  containerd.service            loaded active running containerd container runtime
  dbus-broker.service           loaded active running D-Bus System Message Bus
  docker.service                loaded active running Docker Application Container Engine
  emptty.service                loaded active running emptty display manager
  geoclue.service               loaded active running Location Lookup Service
  getty@tty1.service            loaded active running Getty on tty1
  getty@tty2.service            loaded active running Getty on tty2
  gpm.service                   loaded active running Virtual console mouse server
  i2pd.service                  loaded active running C++ daemon for accessing the I2P network
  iwd.service                   loaded active running Wireless service
  NetworkManager.service        loaded active running Network Manager
  ollama.service                loaded active running Ollama Service
  polkit.service                loaded active running Authorization Manager
  power-profiles-daemon.service loaded active running Power Profiles daemon
  rtkit-daemon.service          loaded active running RealtimeKit Scheduling Policy Service
  sshd.service                  loaded active running OpenSSH Daemon
  systemd-journald.service      loaded active running Journal Service
  systemd-logind.service        loaded active running User Login Management
  systemd-resolved.service      loaded active running Network Name Resolution
  systemd-timesyncd.service     loaded active running Network Time Synchronization
  systemd-udevd.service         loaded active running Rule-based Manager for Device Events and Files
  systemd-userdbd.service       loaded active running User Database Manager
  tailscaled.service            loaded active running Tailscale node agent
  udisks2.service               loaded active running Disk Manager
  upower.service                loaded active running Daemon for power management
  user@1000.service             loaded active running User Manager for UID 1000
  vpn-singbox.service           loaded active running simple vpn systemd unit
  wpa_supplicant.service        loaded active running WPA supplicant

Legend: 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.

30 loaded units listed.