How to shutdown or reboot Linux

The simple way to restart your CentOS/Linux system is by using the reboot command.

reboot

For more options, check the parameters:

root@web [~]# reboot --help
reboot [OPTIONS...] [ARG]

Reboot the system.

     --help      Show this help
     --halt      Halt the machine
  -p --poweroff  Switch off the machine
     --reboot    Reboot the machine
  -f --force     Force immediate halt/power-off/reboot
  -w --wtmp-only Don't halt/power-off/reboot, just write wtmp record
  -d --no-wtmp   Don't write wtmp record
     --no-wall   Don't send wall message before halt/power-off/reboot
root@web [~]#
You must be logged in as root to shutdown the operating system.

The other command is shutdown. It’s similar to reboot.

To reboot the machine with the shutdown command, use:

shutdown -r now

To reboot the machine at a specific time, use:

shutdown -r 02:30

To reboot the machine after X minutes, use:

shutdown -r X

To shutdown the machine, use:

shutdown -h now

To shutdown the machine at a specific time, use:

shutdown -h 02:30

To shutdown the machine after X minutes, use:

shutdown -h X

For more options, check the parameters for the shutdown command:

root@web [~]# shutdown --help
shutdown [OPTIONS...] [TIME] [WALL...]

Shut down the system.

     --help      Show this help
  -H --halt      Halt the machine
  -P --poweroff  Power-off the machine
  -r --reboot    Reboot the machine
  -h             Equivalent to --poweroff, overridden by --halt
  -k             Don't halt/power-off/reboot, just send warnings
     --no-wall   Don't send wall message before halt/power-off/reboot
  -c             Cancel a pending shutdown
root@web [~]#

For more information use the commands:

man reboot
man shutdown
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