Control group /:
-.slice
|-user.slice 
| `-user-500.slice 
|   |-user@500.service ...
|   | |-session.slice 
|   | | |-pulseaudio.service 
|   | | | `- 3259 /usr/bin/pulseaudio --daemonize=no --log-target=journal
|   | | `-dbus.service 
|   | |   |- 3269 /bin/dbus-daemon --session --address=systemd: --nofork --no...
|   | |   |- 3431 mate-menu
|   | |   |- 3491 /usr/libexec/goa-daemon
|   | |   `- 3506 /usr/libexec/goa-identity-service
|   | |-app.slice 
|   | | |-gvfs-goa-volume-monitor.service 
|   | | | `- 3486 /usr/libexec/gvfs/gvfs-goa-volume-monitor
|   | | |-dconf.service 
|   | | | `- 3388 /usr/libexec/dconf-service
|   | | |-gvfs-daemon.service 
|   | | | |- 3358 /usr/libexec/gvfs/gvfsd
|   | | | |- 3363 /usr/libexec/gvfs/gvfsd-fuse /run/user/500/gvfs -f
|   | | | |- 3555 /usr/libexec/gvfs/gvfsd-trash --spawner :1.4 /org/gtk/gvfs/...
|   | | | |- 4528 /usr/libexec/gvfs/gvfsd-network --spawner :1.4 /org/gtk/gvf...
|   | | | `- 4541 /usr/libexec/gvfs/gvfsd-dnssd --spawner :1.4 /org/gtk/gvfs/...
|   | | |-gvfs-udisks2-volume-monitor.service 
|   | | | `- 3433 /usr/libexec/gvfs/gvfs-udisks2-volume-monitor
|   | | |-gvfs-gphoto2-volume-monitor.service 
|   | | | `- 3476 /usr/libexec/gvfs/gvfs-gphoto2-volume-monitor
|   | | |-obex.service 
|   | | | `- 3590 /usr/libexec/bluetooth/obexd
|   | | |-at-spi-dbus-bus.service 
|   | | | |- 3370 /usr/libexec/at-spi-bus-launcher
|   | | | |- 3376 /bin/dbus-daemon --config-file=/usr/share/defaults/at-spi2/...
|   | | | `- 3396 /usr/libexec/at-spi2-registryd --use-gnome-session
|   | | |-gvfs-metadata.service 
|   | | | `- 3624 /usr/libexec/gvfs/gvfsd-metadata
|   | | |-gvfs-mtp-volume-monitor.service 
|   | | | `- 3464 /usr/libexec/gvfs/gvfs-mtp-volume-monitor
|   | | `-gvfs-afc-volume-monitor.service 
|   | |   `- 3452 /usr/libexec/gvfs/gvfs-afc-volume-monitor
|   | `-init.scope 
|   |   |- 3250 /lib/systemd/systemd --user
|   |   `- 3252 (sd-pam)
|   |-session-3.scope 
|   | |- 3231 lightdm --session-child 12 19
|   | |- 3263 /usr/bin/gnome-keyring-daemon --daemonize --login
|   | |- 3266 /usr/bin/mate-session
|   | |- 3310 ssh-agent -u
|   | |- 3394 /usr/libexec/mate-settings-daemon
|   | |- 3407 marco
|   | |- 3415 mate-panel
|   | |- 3428 /usr/bin/caja
|   | |- 3440 blueberry-obex-agent
|   | |- 3446 apt-indicator --autostarted
|   | |- 3467 blueberry-tray
|   | |- 3474 mate-volume-control-status-icon
|   | |- 3487 mate-screensaver
|   | |- 3492 nm-applet
|   | |- 3493 /usr/bin/python3 /usr/share/system-config-printer/applet.py
|   | |- 3494 mate-power-manager
|   | |- 3496 /usr/libexec/polkit-mate-authentication-agent-1
|   | |- 3502 parcellite
|   | |- 3608 /bin/sh /usr/share/blueberry/safechild /usr/sbin/rfkill event
|   | |- 3609 /usr/sbin/rfkill event
|   | |- 4302 mate-terminal
|   | |- 4344 bash
|   | |- 4430 bash
|   | |- 4434 su -
|   | |- 4440 -bash
|   | |- 5692 -bash
|   | |- 6000 dbus-launch --exit-with-session /usr/bin/mate-session --version
|   | |- 6001 /bin/dbus-daemon --syslog --fork --print-pid 5 --print-address ...
|   | |- 8116 /usr/bin/python2.7 /usr/sbin/sosreport
|   | |- 8254 timeout 300s systemd-cgls
|   | `- 8255 systemd-cgls
|   `-session-5.scope 
|     |- 4717 sshd: test [priv]
|     |- 4722 sshd: test@pts/2
|     |- 4723 -bash
|     |- 4760 su -
|     `- 4764 -bash
|-init.scope 
| `- 1 /sbin/init splash
`-system.slice 
  |-nmb.service 
  | `- 3103 /usr/sbin/nmbd --foreground --no-process-group
  |-systemd-udevd.service 
  | |- 2256 /lib/systemd/systemd-udevd
  | |- 8182 (udev-worker)
  | |- 8209 (udev-worker)
  | |- 8210 (udev-worker)
  | `- 8211 (udev-worker)
  |-polkit.service 
  | `- 2551 /usr/libexec/polkit-1/polkitd --no-debug
  |-chronyd.service 
  | `- 3039 /usr/sbin/chronyd
  |-bluetooth.service 
  | `- 2539 /usr/libexec/bluetooth/bluetoothd
  |-accounts-daemon.service 
  | `- 2529 /usr/libexec/accounts-daemon
  |-wpa_supplicant.service 
  | `- 2809 /usr/sbin/wpa_supplicant -u
  |-lightdm.service 
  | |- 3131 /usr/sbin/lightdm
  | `- 3142 X -nolisten tcp :0 -seat seat0 -auth /run/lightdm/root/:0 -nolist...
  |-ModemManager.service 
  | `- 2637 /usr/sbin/ModemManager
  |-systemd-journald.service 
  | `- 2225 /lib/systemd/systemd-journald
  |-sshd.service 
  | `- 4715 /usr/sbin/sshd -D
  |-crond.service 
  | `- 2685 /usr/sbin/crond -n
  |-colord.service 
  | `- 2706 /usr/libexec/colord
  |-NetworkManager.service 
  | `- 2658 /usr/sbin/NetworkManager --no-daemon
  |-cups-browsed.service 
  | `- 3101 /usr/sbin/cups-browsed
  |-cups.service 
  | |- 2676 /usr/sbin/cupsd -l
  | `- 3163 /usr/lib/cups/notifier/dbus dbus://
  |-pcscd.service 
  | `- 4514 /usr/sbin/pcscd --foreground --auto-exit
  |-smb.service 
  | |- 3119 /usr/sbin/smbd --foreground --no-process-group
  | |- 3140 /usr/sbin/smbd --foreground --no-process-group
  | `- 3141 /usr/sbin/smbd --foreground --no-process-group
  |-upower.service 
  | `- 2561 /usr/libexec/upower/upowerd
  |-alteratord.service 
  | `- 2531 /usr/bin/guile --no-auto-compile /usr/sbin/alteratord
  |-udisks2.service 
  | `- 2558 /usr/libexec/udisks2/udisksd
  |-dbus.service 
  | `- 2543 /bin/dbus-daemon --system --address=systemd: --nofork --nopidfile...
  |-avahi-daemon.service 
  | |- 2535 avahi-daemon: running [AsusVivobookSlate13OLED.local]
  | `- 2595 avahi-daemon: chroot helper
  `-systemd-logind.service 
    `- 2555 /lib/systemd/systemd-logind
