Control group /:
-.slice
|-user.slice 
| `-user-500.slice 
|   |-user@500.service ...
|   | |-session.slice 
|   | | |-pulseaudio.service 
|   | | | `- 2855 /usr/bin/pulseaudio --daemonize=no --log-target=journal
|   | | `-dbus.service 
|   | |   |- 2863 /bin/dbus-daemon --session --address=systemd: --nofork --no...
|   | |   |- 3100 /usr/libexec/goa-daemon
|   | |   |- 3113 /usr/libexec/goa-identity-service
|   | |   |- 3121 mate-menu
|   | |   |- 3758 firefox
|   | |   |- 3761 /usr/lib64/firefox/firefox
|   | |   |- 3877 /usr/lib64/firefox/firefox -contentproc -parentBuildID 2023...
|   | |   |- 3921 /usr/lib64/firefox/firefox -contentproc -childID 1 -isForBr...
|   | |   |- 3945 /usr/lib64/firefox/firefox -contentproc -childID 2 -isForBr...
|   | |   |- 3966 /usr/lib64/firefox/firefox -contentproc -childID 3 -isForBr...
|   | |   |- 4169 /usr/lib64/firefox/firefox -contentproc -parentBuildID 2023...
|   | |   |- 4170 /usr/lib64/firefox/firefox -contentproc -parentBuildID 2023...
|   | |   |- 4227 /usr/lib64/firefox/firefox -contentproc -childID 8 -isForBr...
|   | |   |- 4718 /usr/lib64/firefox/firefox -contentproc -childID 13 -isForB...
|   | |   |- 4770 /usr/lib64/firefox/firefox -contentproc -childID 15 -isForB...
|   | |   |- 4822 /usr/lib64/firefox/firefox -contentproc -childID 16 -isForB...
|   | |   `- 4825 /usr/lib64/firefox/firefox -contentproc -childID 17 -isForB...
|   | |-app.slice 
|   | | |-gvfs-goa-volume-monitor.service 
|   | | | `- 3096 /usr/libexec/gvfs/gvfs-goa-volume-monitor
|   | | |-dconf.service 
|   | | | `- 3052 /usr/libexec/dconf-service
|   | | |-gvfs-daemon.service 
|   | | | |- 2954 /usr/libexec/gvfs/gvfsd
|   | | | |- 2960 /usr/libexec/gvfs/gvfsd-fuse /run/user/500/gvfs -f
|   | | | |- 3211 /usr/libexec/gvfs/gvfsd-trash --spawner :1.5 /org/gtk/gvfs/...
|   | | | |- 3418 /usr/libexec/gvfs/gvfsd-network --spawner :1.5 /org/gtk/gvf...
|   | | | `- 3435 /usr/libexec/gvfs/gvfsd-dnssd --spawner :1.5 /org/gtk/gvfs/...
|   | | |-gvfs-udisks2-volume-monitor.service 
|   | | | `- 3087 /usr/libexec/gvfs/gvfs-udisks2-volume-monitor
|   | | |-gvfs-gphoto2-volume-monitor.service 
|   | | | `- 3092 /usr/libexec/gvfs/gvfs-gphoto2-volume-monitor
|   | | |-obex.service 
|   | | | `- 3234 /usr/libexec/bluetooth/obexd
|   | | |-at-spi-dbus-bus.service 
|   | | | |- 2968 /usr/libexec/at-spi-bus-launcher
|   | | | |- 2974 /bin/dbus-daemon --config-file=/usr/share/defaults/at-spi2/...
|   | | | `- 3060 /usr/libexec/at-spi2-registryd --use-gnome-session
|   | | |-gvfs-metadata.service 
|   | | | `- 3255 /usr/libexec/gvfs/gvfsd-metadata
|   | | |-gvfs-mtp-volume-monitor.service 
|   | | | `- 3129 /usr/libexec/gvfs/gvfs-mtp-volume-monitor
|   | | `-gvfs-afc-volume-monitor.service 
|   | |   `- 3116 /usr/libexec/gvfs/gvfs-afc-volume-monitor
|   | `-init.scope 
|   |   |- 2846 /lib/systemd/systemd --user
|   |   `- 2848 (sd-pam)
|   |-session-3.scope 
|   | |- 2834 lightdm --session-child 12 19
|   | |- 2859 /usr/bin/gnome-keyring-daemon --daemonize --login
|   | |- 2862 /usr/bin/mate-session
|   | |- 2906 ssh-agent -u
|   | |- 3058 /usr/libexec/mate-settings-daemon
|   | |- 3071 marco
|   | |- 3083 mate-panel
|   | |- 3104 /usr/bin/caja
|   | |- 3135 /usr/bin/python3 /usr/share/system-config-printer/applet.py
|   | |- 3140 mate-screensaver
|   | |- 3142 /usr/libexec/polkit-mate-authentication-agent-1
|   | |- 3147 blueberry-obex-agent
|   | |- 3149 parcellite
|   | |- 3155 apt-indicator --autostarted
|   | |- 3158 mate-volume-control-status-icon
|   | |- 3165 mate-power-manager
|   | |- 3169 nm-applet
|   | |- 3728 mate-volume-control
|   | |- 4927 mate-terminal
|   | |- 4967 bash
|   | |- 4971 su -
|   | |- 4977 -bash
|   | |- 5438 -bash
|   | |- 5611 dbus-launch --exit-with-session /usr/bin/mate-session --version
|   | |- 5612 /bin/dbus-daemon --syslog --fork --print-pid 5 --print-address ...
|   | |- 7726 /usr/bin/python2.7 /usr/sbin/sosreport
|   | |- 7875 timeout 300s systemd-cgls
|   | `- 7876 systemd-cgls
|   `-session-5.scope 
|     |- 5066 sshd: test [priv]
|     |- 5071 sshd: test@pts/1
|     |- 5072 -bash
|     |- 5109 su -
|     |- 5113 -bash
|     |- 5464 time memtester 100 1
|     `- 5465 memtester 100 1
|-init.scope 
| `- 1 /sbin/init splash
`-system.slice 
  |-systemd-udevd.service 
  | |- 2100 /lib/systemd/systemd-udevd
  | |- 7796 (udev-worker)
  | |- 7825 (udev-worker)
  | |- 7826 (udev-worker)
  | `- 7827 (udev-worker)
  |-polkit.service 
  | `- 2377 /usr/libexec/polkit-1/polkitd --no-debug
  |-chronyd.service 
  | `- 3626 /usr/sbin/chronyd
  |-accounts-daemon.service 
  | `- 2341 /usr/libexec/accounts-daemon
  |-wpa_supplicant.service 
  | `- 3376 /usr/sbin/wpa_supplicant -u
  |-lightdm.service 
  | |- 2758 /usr/sbin/lightdm
  | `- 2766 X -nolisten tcp :0 -seat seat0 -auth /run/lightdm/root/:0 -nolist...
  |-ModemManager.service 
  | `- 2498 /usr/sbin/ModemManager
  |-systemd-journald.service 
  | `- 2068 /lib/systemd/systemd-journald
  |-sshd.service 
  | `- 5064 /usr/sbin/sshd -D
  |-crond.service 
  | `- 2514 /usr/sbin/crond -n
  |-colord.service 
  | `- 2539 /usr/libexec/colord
  |-NetworkManager.service 
  | `- 2494 /usr/sbin/NetworkManager --no-daemon
  |-cups-browsed.service 
  | `- 3258 /usr/sbin/cups-browsed
  |-cups.service 
  | |- 2506 /usr/sbin/cupsd -l
  | `- 3643 /usr/lib/cups/notifier/dbus dbus://
  |-pcscd.service 
  | `- 3401 /usr/sbin/pcscd --foreground --auto-exit
  |-smb.service 
  | |- 3348 /usr/sbin/smbd --foreground --no-process-group
  | |- 3350 /usr/sbin/smbd --foreground --no-process-group
  | `- 3351 /usr/sbin/smbd --foreground --no-process-group
  |-upower.service 
  | `- 2386 /usr/libexec/upower/upowerd
  |-alteratord.service 
  | `- 2343 /usr/bin/guile --no-auto-compile /usr/sbin/alteratord
  |-udisks2.service 
  | `- 2384 /usr/libexec/udisks2/udisksd
  |-dbus.service 
  | `- 2370 /bin/dbus-daemon --system --address=systemd: --nofork --nopidfile...
  |-avahi-daemon.service 
  | |- 2347 avahi-daemon: running [Gigabyte-B760.local]
  | `- 2406 avahi-daemon: chroot helper
  `-systemd-logind.service 
    `- 2380 /lib/systemd/systemd-logind
