dan@miyolinux:~$ dpkg -S loginctl
elogind: /usr/share/bash-completion/completions/loginctl
elogind: /usr/share/man/man1/loginctl.1.gz
elogind: /bin/loginctl
elogind: /usr/share/zsh/site-functions/_loginctl

dan@miyolinux:~$ loginctl -h
loginctl [OPTIONS...] {COMMAND} ...

Send control commands to or query the login manager.

  -h --help                Show this help
     --version             Show package version
     --no-pager            Do not pipe output into a pager
     --no-wall             Do not print any wall message
     --dry-run             Only print what would be done
  -q --quiet               Suppress output
     --no-legend           Do not show the headers and footers
     --no-ask-password     Don't prompt for password
  -H --host=[USER@]HOST    Operate on remote host
  -M --machine=CONTAINER   Operate on local container
  -p --property=NAME       Show only properties by this name
  -a --all                 Show all properties, including empty ones
     --value               When showing properties, only print the value
  -l --full                Do not ellipsize output
     --kill-who=WHO        Who to send signal to
  -s --signal=SIGNAL       Which signal to send
  -c                       Cancel a pending shutdown or reboot
  -i --ignore-inhibitors   When shutting down or sleeping, ignore inhibitors

Session Commands:
  list[-sessions]          List sessions (default command)
  session-status [ID...]   Show session status
  show-session [ID...]     Show properties of sessions or the manager
  activate [ID]            Activate a session
  lock-session [ID...]     Screen lock one or more sessions
  unlock-session [ID...]   Screen unlock one or more sessions
  lock-sessions            Screen lock all current sessions
  unlock-sessions          Screen unlock all current sessions
  terminate-session ID...  Terminate one or more sessions
  kill-session ID...       Send signal to processes of a session

User Commands:
  list-users               List users
  user-status [USER...]    Show user status
  show-user [USER...]      Show properties of users or the manager
  enable-linger [USER...]  Enable linger state of one or more users
  disable-linger [USER...] Disable linger state of one or more users
  terminate-user USER...   Terminate all sessions of one or more users
  kill-user USER...        Send signal to processes of a user

Seat Commands:
  list-seats               List seats
  seat-status [NAME...]    Show seat status
  show-seat [NAME...]      Show properties of seats or the manager
  attach NAME DEVICE...    Attach one or more devices to a seat
  flush-devices            Flush all device associations
  terminate-seat NAME...   Terminate all sessions on one or more seats

System Commands:
  poweroff [TIME] [WALL...] Turn off the machine
  reboot   [TIME] [WALL...] Reboot the machine
  suspend                   Suspend the machine to memory
  hibernate                 Suspend the machine to disk
  hybrid-sleep              Suspend the machine to memory and disk
  suspend-then-hibernate    Suspend the system, wake after a period of
                            time and put it into hibernate

$ dpkg -S loginctl 
elogind: /bin/loginctl

$ apt policy elogind        
elogind:
  Installed: 239.3+20190131-1
  Candidate: 239.3+20190131-1
  Version table:
 *** 239.3+20190131-1 500
        500 http://gr.deb.devuan.org/merged testing/main amd64 Packages
        500 http://gr.deb.devuan.org/merged ceres/main amd64 Packages
        100 /var/lib/dpkg/status

dpkg -S loginctl

apt-file find loginctl

loginctl poweroff
loginctl reboot
loginctl suspend
loginctl hibernate

#!/bin/sh

yad --form --center --undecorated --align=left --width=165 --borders=10 --height=320 --skip-taskbar \
--image=/usr/share/miyolinux/miyo-exit.png --image-on-top \
--field="  Shutdown!gnome-shutdown!Shut Down":fbtn "loginctl poweroff" \
--field="  Reboot!system-reboot!Restart":fbtn "loginctl reboot" \
--field="  Suspend!gnome-session-suspend!Suspend":fbtn "loginctl suspend" \
--field="  Hibernate!gnome-session-hibernate!Hibernate":fbtn "loginctl hibernate" \
--field="  Log Out!gnome-logout!Log Out":fbtn "openbox --exit" \
--button=gtk-cancel --buttons-layout=center \