Understanding Shutdown, Poweroff, Halt and Reboot Commands in Linux
Aaron Kili
In this article, we will explain to you the difference between shutdown, poweroff, halt and reboot Linux commands. Examples of shutdown commands: # shutdown # shutdown now # shutdown 13:20 # shutdown -p now #poweroff the machine # shutdown -H now #halt the machine # shutdown -r09:35 #reboot the machine at 09:35am To cancel a pending shutdown, simply type the command below: # shutdown -c Halt Command halt instructs the hardware to stop all CPU functions, but leaves it powered on. Below are examples of halt commands: # halt #halt the machine # halt -p #poweroff the machine # halt –reboot #reboot the machine Power off Command poweroff sends an ACPI signal which instructs the system to power down. The following are examples of poweroff commands: # poweroff #poweroff the machine # poweroff –halt #halt the machine # poweroff –reboot #reboot the machine Reboot Command reboot instructs the system to restart. # reboot #reboot the machine # reboot –halt #halt the machine # reboot -p #poweroff the machine That’s all!
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