kshutdown: WARNING: "DESKTOP_SESSION" and "XDG_CURRENT_DESKTOP" environment variables not set (unknown or unsupported Desktop Environment). Good luck. Usage: kshutdown [Qt-options] [KDE-options] [options] [time] A graphical shutdown utility Generic options: --help Show help about options --help-qt Show Qt specific options --help-kde Show KDE specific options --help-all Show all options --author Show author information -v, --version Show version information --license Show license information -- End of options Actions: -h, --halt Turn Off Computer -s, --shutdown Turn Off Computer -r, --reboot Restart Computer -H, --hibernate Hibernate Computer -S, --suspend Suspend Computer -k, --lock Lock screen -l, --logout Logout -e, --extra <file> Run executable file (example: Desktop shortcut or Shell script) --test Test Action (does nothing) Triggers: -i, --inactivity Detect user inactivity. Example: --logout --inactivity 90 - automatically logout after 90 minutes of user inactivity Other Options: --cancel Cancel an active action --confirm Confirm command line action --hide-ui Hide main window and system tray icon --init Do not show main window on startup --mod <value> A list of modifications --ui-menu <value> Show custom popup menu instead of main window Arguments: time Activate countdown. Examples: 13:37 (HH:MM) or "1:37 PM" - absolute time 10 or 10m - number of minutes from now 2h - two hours More Info... http://sourceforge.net/p/kshutdown/wiki/Command%20Line/