![]() ![]() f flag makes sure that the shutdown utility is not invoked rather the system is rebooted in a non-graceful way. This is made possible by using the -f flag $ reboot -f Just run reboot as superuser and your system will reboot after entering the superuser password. This command invokes the reboot() system call or the shutdown() system call depending on how it is used.ĥ reboot Examples 1. Always run these commands with caution and ensure you are running it on the correct system.The ‘reboot’ command in Linux is used to reboot the system. I hope you now have a good understanding of how to use Linux shutdown, poweroff, and reboot command. The system will reset instantly just like pressing the reset button in the CPU. The -f option with reboot command will forcibly reboot the system. Use -p option with reboot command will power off the system instead of rebooting the system reboot -p Force reboot system When used with no options, it will reboot the system immediately. The reboot command is used to reboot the system. The system will poweroff instantly just like unplugging the power source of the CPU. The -f option with poweroff command will forcibly poweroff the system. Use –reboot option with reboot command will reboot the system instead of power-off the system poweroff -reboot Force poweroff system When used with no options, it will power-off the system immediately. The poweroff command is used to power-off the system. shutdown -c Cancel Scheduled Shutdown How To use poweroff Command Shutdown -r +3 Cancel a scheduled shutdownįor any reason, you want to cancel the scheduled shutdown, use -c option. Use now in shutdown command to bring the system immediately. shutdown Shutdown System Shutdown System Immediately ![]() The shutdown process starts after 1 minute (default interval). ![]() When no option used with shutdown command, it will power off the machine. Options – Shutdown options like halt (-h), reboot (-r) or power-off (-P default) Time – Specifies when to perform shutdown (+m, hh:mm or now) Message – Broadcast message to all logged in users. The shutdown command is a simple command and is available in all Linux flavors like CentOS, Ubuntu, Debian or Fedora. When we initiate shutdown, all logged-in users are notified that the system is going down and no new logins are allowed, and then all the running process are stopped before the system finally halts. The shutdown command in Linux safely brings the system down. Prefix sudo to execute these power cycle commands like sudo shutdown in Ubuntu or Debian or Fedora. ![]()
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January 2023
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