Control group /:
-.slice
|-user.slice 
| |-user-0.slice 
| | |-session-3.scope 
| | | |-2819 /bin/login -p -- root
| | | `-2839 -bash
| | `-user@0.service ...
| |   `-init.scope 
| |     |-2830 /lib/systemd/systemd --user
| |     `-2832 (sd-pam)
| |-user-490.slice 
| | |-user@490.service ...
| | | |-app.slice 
| | | | |-gvfs-daemon.service 
| | | | | |-2670 /usr/libexec/gvfs/gvfsd
| | | | | `-2675 /usr/libexec/gvfs/gvfsd-fuse /run/user/490/gvfs -f
| | | | |-at-spi-dbus-bus.service 
| | | | | |-2663 /usr/libexec/at-spi-bus-launcher
| | | | | |-2668 /bin/dbus-daemon --config-file=/usr/share/defaults/at-spi2/a...
| | | | | `-2706 /usr/libexec/at-spi2-registryd --use-gnome-session
| | | | `-dbus.service 
| | | |   `-2662 /bin/dbus-daemon --session --address=systemd: --nofork --nop...
| | | `-init.scope 
| | |   |-2638 /lib/systemd/systemd --user
| | |   `-2640 (sd-pam)
| | `-session-1.scope 
| |   |-2633 lightdm --session-child 18 21
| |   `-2647 /usr/sbin/lightdm-gtk-greeter
| `-user-500.slice 
|   |-user@500.service ...
|   | `-init.scope 
|   |   |-2957 /lib/systemd/systemd --user
|   |   `-2959 (sd-pam)
|   `-session-5.scope 
|     |-2949 sshd: test [priv]
|     |-2966 sshd: test@pts/0
|     |-2967 -bash
|     |-3002 su -
|     |-3006 -bash
|     |-3233 /usr/bin/python2.7 /usr/sbin/sosreport
|     |-3373 timeout 300s systemd-cgls
|     `-3374 systemd-cgls
|-init.scope 
| `-1 /sbin/init splash
`-system.slice 
  |-systemd-udevd.service 
  | |-2185 /lib/systemd/systemd-udevd
  | |-3295 /lib/systemd/systemd-udevd
  | |-3350 /lib/systemd/systemd-udevd
  | |-3351 /lib/systemd/systemd-udevd
  | |-3352 /lib/systemd/systemd-udevd
  | |-3353 /lib/systemd/systemd-udevd
  | |-3354 /lib/systemd/systemd-udevd
  | |-3358 /lib/systemd/systemd-udevd
  | |-3359 /lib/systemd/systemd-udevd
  | `-3360 /lib/systemd/systemd-udevd
  |-polkit.service 
  | `-2369 /usr/libexec/polkit-1/polkitd --no-debug
  |-chronyd.service 
  | `-2803 /usr/sbin/chronyd
  |-bluetooth.service 
  | `-2355 /usr/libexec/bluetooth/bluetoothd
  |-wpa_supplicant.service 
  | `-2575 /usr/sbin/wpa_supplicant -u
  |-lightdm.service 
  | |-2479 /usr/sbin/lightdm
  | |-2491 X -nolisten tcp :0 -seat seat0 -auth /run/lightdm/root/:0 -noliste...
  | `-2704 lightdm --session-child 14 21
  |-ModemManager.service 
  | `-2467 /usr/sbin/ModemManager
  |-systemd-journald.service 
  | `-2163 /lib/systemd/systemd-journald
  |-sshd.service 
  | `-2942 sshd: /usr/sbin/sshd -D [listener] 0 of 10-100 startups
  |-crond.service 
  | `-2478 /usr/sbin/crond -n
  |-NetworkManager.service 
  | `-2469 /usr/sbin/NetworkManager --no-daemon
  |-systemd-userdbd.service 
  | |-2191 /lib/systemd/systemd-userdbd
  | |-2193 systemd-userwork
  | |-2194 systemd-userwork
  | |-2195 systemd-userwork
  | |-2373 systemd-userwork
  | |-2376 systemd-userwork
  | |-2394 systemd-userwork
  | |-2395 systemd-userwork
  | `-2396 systemd-userwork
  |-alteratord.service 
  | `-2353 /usr/bin/guile --no-auto-compile /usr/sbin/alteratord
  |-dbus.service 
  | `-2358 /bin/dbus-daemon --system --address=systemd: --nofork --nopidfile ...
  |-avahi-daemon.service 
  | |-2354 avahi-daemon: running [linux.local]
  | `-2377 avahi-daemon: chroot helper
  `-systemd-logind.service 
    `-2370 /lib/systemd/systemd-logind
