Control group /:
-.slice
|-user.slice 
| `-user-500.slice 
|   |-user@500.service ...
|   | |-session.slice 
|   | | |-pulseaudio.service 
|   | | | `- 2631 /usr/bin/pulseaudio --daemonize=no --log-target=journal
|   | | `-dbus.service 
|   | |   |- 2639 /bin/dbus-daemon --session --address=systemd: --nofork --no...
|   | |   |- 2833 /usr/libexec/goa-daemon
|   | |   |- 2842 mate-menu
|   | |   |- 2848 /usr/libexec/goa-identity-service
|   | |   `- 4531 /usr/libexec/mate-notification-daemon
|   | |-app.slice 
|   | | |-gvfs-goa-volume-monitor.service 
|   | | | `- 2828 /usr/libexec/gvfs/gvfs-goa-volume-monitor
|   | | |-dconf.service 
|   | | | `- 2783 /usr/libexec/dconf-service
|   | | |-gvfs-daemon.service 
|   | | | |- 2754 /usr/libexec/gvfs/gvfsd
|   | | | |- 2759 /usr/libexec/gvfs/gvfsd-fuse /run/user/500/gvfs -f
|   | | | `- 2935 /usr/libexec/gvfs/gvfsd-trash --spawner :1.6 /org/gtk/gvfs/...
|   | | |-gvfs-udisks2-volume-monitor.service 
|   | | | `- 2818 /usr/libexec/gvfs/gvfs-udisks2-volume-monitor
|   | | |-gvfs-gphoto2-volume-monitor.service 
|   | | | `- 2853 /usr/libexec/gvfs/gvfs-gphoto2-volume-monitor
|   | | |-obex.service 
|   | | | `- 2962 /usr/libexec/bluetooth/obexd
|   | | |-at-spi-dbus-bus.service 
|   | | | |- 2765 /usr/libexec/at-spi-bus-launcher
|   | | | |- 2771 /bin/dbus-daemon --config-file=/usr/share/defaults/at-spi2/...
|   | | | `- 2791 /usr/libexec/at-spi2-registryd --use-gnome-session
|   | | |-gvfs-metadata.service 
|   | | | `- 2987 /usr/libexec/gvfs/gvfsd-metadata
|   | | |-gvfs-mtp-volume-monitor.service 
|   | | | `- 2864 /usr/libexec/gvfs/gvfs-mtp-volume-monitor
|   | | `-gvfs-afc-volume-monitor.service 
|   | |   `- 2823 /usr/libexec/gvfs/gvfs-afc-volume-monitor
|   | `-init.scope 
|   |   |- 2622 /lib/systemd/systemd --user
|   |   `- 2624 (sd-pam)
|   |-session-3.scope 
|   | |- 2607 lightdm --session-child 12 19
|   | |- 2635 /usr/bin/gnome-keyring-daemon --daemonize --login
|   | |- 2638 /usr/bin/mate-session
|   | |- 2689 ssh-agent -u
|   | |- 2789 /usr/libexec/mate-settings-daemon
|   | |- 2802 marco
|   | |- 2814 mate-panel
|   | |- 2836 /usr/bin/caja
|   | |- 2860 /usr/bin/python3 /usr/share/system-config-printer/applet.py
|   | |- 2862 blueberry-tray
|   | |- 2863 nm-applet
|   | |- 2869 apt-indicator --autostarted
|   | |- 2876 /usr/libexec/polkit-mate-authentication-agent-1
|   | |- 2878 mate-power-manager
|   | |- 2879 mate-screensaver
|   | |- 2890 parcellite
|   | |- 2895 mate-volume-control-status-icon
|   | |- 2897 blueberry-obex-agent
|   | |- 2967 /bin/sh /usr/share/blueberry/safechild /usr/sbin/rfkill event
|   | |- 2968 /usr/sbin/rfkill event
|   | |- 2995 mate-terminal
|   | |- 3038 bash
|   | |- 3268 su -
|   | |- 3274 -bash
|   | |- 4608 -bash
|   | |- 4916 dbus-launch --exit-with-session /usr/bin/mate-session --version
|   | |- 4917 /bin/dbus-daemon --syslog --fork --print-pid 5 --print-address ...
|   | |- 6672 /usr/bin/python2.7 /usr/sbin/sosreport
|   | |- 6810 timeout 300s systemd-cgls
|   | `- 6811 systemd-cgls
|   `-session-5.scope 
|     |- 4485 sshd: test [priv]
|     |- 4490 sshd: test@pts/1
|     |- 4491 -bash
|     |- 4528 su -
|     `- 4543 -bash
|-init.scope 
| `- 1 /sbin/init splash
`-system.slice 
  |-nmb.service 
  | `- 3215 /usr/sbin/nmbd --foreground --no-process-group
  |-systemd-udevd.service 
  | |- 2066 /lib/systemd/systemd-udevd
  | |- 6738 (udev-worker)
  | |- 6766 (udev-worker)
  | |- 6767 (udev-worker)
  | `- 6768 (udev-worker)
  |-polkit.service 
  | `- 2238 /usr/libexec/polkit-1/polkitd --no-debug
  |-chronyd.service 
  | `- 3241 /usr/sbin/chronyd
  |-bluetooth.service 
  | `- 2450 /usr/libexec/bluetooth/bluetoothd
  |-accounts-daemon.service 
  | `- 2225 /usr/libexec/accounts-daemon
  |-wpa_supplicant.service 
  | `- 2514 /usr/sbin/wpa_supplicant -u
  |-lightdm.service 
  | |- 2356 /usr/sbin/lightdm
  | `- 2370 X -nolisten tcp :0 -seat seat0 -auth /run/lightdm/root/:0 -nolist...
  |-ModemManager.service 
  | `- 2336 /usr/sbin/ModemManager
  |-systemd-journald.service 
  | `- 2043 /lib/systemd/systemd-journald
  |-sshd.service 
  | `- 3386 /usr/sbin/sshd -D
  |-crond.service 
  | `- 2355 /usr/sbin/crond -n
  |-colord.service 
  | `- 2366 /usr/libexec/colord
  |-NetworkManager.service 
  | `- 2337 /usr/sbin/NetworkManager --no-daemon
  |-cups-browsed.service 
  | `- 3213 /usr/sbin/cups-browsed
  |-cups.service 
  | |- 2346 /usr/sbin/cupsd -l
  | `- 3266 /usr/lib/cups/notifier/dbus dbus://
  |-smb.service 
  | |- 3236 /usr/sbin/smbd --foreground --no-process-group
  | |- 3260 /usr/sbin/smbd --foreground --no-process-group
  | `- 3262 /usr/sbin/smbd --foreground --no-process-group
  |-upower.service 
  | `- 2254 /usr/libexec/upower/upowerd
  |-alteratord.service 
  | `- 2227 /usr/bin/guile --no-auto-compile /usr/sbin/alteratord
  |-udisks2.service 
  | `- 2251 /usr/libexec/udisks2/udisksd
  |-dbus.service 
  | `- 2231 /bin/dbus-daemon --system --address=systemd: --nofork --nopidfile...
  |-avahi-daemon.service 
  | |- 2228 avahi-daemon: running [HuaweiMatebookD15Bom.local]
  | `- 2262 avahi-daemon: chroot helper
  `-systemd-logind.service 
    `- 2249 /lib/systemd/systemd-logind
