- #TERMINAL MAC SHUTDOWN COMMAND IN THE FUTURE HOW TO#
- #TERMINAL MAC SHUTDOWN COMMAND IN THE FUTURE FREE#
If you have any questions or suggestions, feel free to let me know in the comment section. You might also like reading about the less command usage or browse through the list of Linux commands we have covered so far.
#TERMINAL MAC SHUTDOWN COMMAND IN THE FUTURE HOW TO#
I hope you have learned how to shut down a Linux system via command line. These were the most common and the most useful examples of the Linux shutdown command. These days, halt should automatically power off the system thanks to ACPI. Historically, the earlier computers used to halt the system and then print a message like “it’s ok to power off now” and then the computers were turned off through physical switches. Power off (option -P): Pretty much like halt but it also turns off the unit itself (lights and everything on the system). Halt (option -H): terminates all processes and shuts down the cpu. Similarly, you can use the flag -f to skip the filesystem check. So if you use it with any of the above mentioned options of shutdown command, it will do a filesystem check when the system starts again. You can force a filesystem check at the next reboot with the -F option. sudo shutdown -c "planned shutdown has been cancelled" Bonus: Filesystem check at reboot
sudo shutdown -cĪnd if you had broadcasted a messaged about the scheduled shutdown, as a good sysadmin, you might also want to notify other users about cancelling the scheduled shutdown. You can always cancel a shutdown with option -c. If you scheduled a shutdown, you don’t have to live with it. It won’t shut down the system but the broadcast message will be sent to all logged on users. You can customize the broadcast message in the shutdown command itself: sudo shutdown 16:00 "systems will be shutdown for hardware upgrade, please save your work"įun Stuff: You can use the shutdown command with -k option to initiate a ‘fake shutdown’. If you are in a multi-user environment and there are several users logged on the system, you can send them a custom broadcast message with the shutdown command.īy default, all the logged users will receive a notification about scheduled shutdown and its time. You can also reboot the system immediately with shutdown command: sudo shutdown -r now 4. You can schedule reboots the same way you did with shutdown. So, if you used shutdown -r without any time argument, it will schedule a reboot after one minute. It’s just that instead of a shutdown, the system will be restarted. The behavior is the same as the regular shutdown command. To reboot a Linux system using the shutdown command, use the -r option. You can use the Linux shutdown command for rebooting as well. There is a separate reboot command but you don’t need to learn a new command just for rebooting the system. Which means a new user cannot log on to the system within five minutes of the scheduled shutdown.ģ. Needless to say that the reference time and timezone is the system time itself.įive minutes before the scheduled shutdown, the system won’t allow any login activity. If you want to shutdown the system at 4 PM in the afternoon, you can use it in the following manner: sudo shutdown 16:00 You can schedule a shutdown in future by providing the time argument either in +t format or in hh:mm format.įor example, if you want to shutdown the system after 15 minutes, you can use this command: sudo shutdown +15 You can immediately shutdown your system by specifying the scheduled time +0 or now. You don’t always have to wait one minute for the system to shutdown. Unsuspecting Linux users expect the shutdown command to immediately shut down the system but when they see a message like this with timestamp in UTC, they often get confused. Shutdown scheduled for Mon 11:33:36 UTC, use 'shutdown -c' to cancel. So remember that the default time interval for shutdown command in one minute. If you simply use the shutdown command, it will start the shutdown process after one minute. Now that you know the syntax of the shutdown command let’s see how to use it. 5 practical examples of shutdown command in Linux Hence, you should either be root or run the command with sudo. Note: The shutdown command needs superuser privileges. message: You can send a custom message to all the logged in users on your Linux system.time: You can specify when to perform the shutdown.options: You can specify if you want to halt, power off, reboot etc.It is unsurprisingly called shutdown.īefore seeing the usage of the shutdown command, let’s first see its syntax. There is a dedicated command to shut down a system in Linux.