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To shut down Red Hat Linux, issue the shutdown command. You can read the shutdown man page for complete details, but the two most common uses are:
/sbin/shutdown -h now /sbin/shutdown -r now
You must run shutdown as root. After you’ve shut everything down, the -h option will halt the machine, and the -r option will reboot. Non-root users can use the reboot and halt commands to shut down the system while in runlevels 1 through 5. However, not all Linux distributions support this feature.
If your computer does not power itself down, be careful not to turn it off until you see a message indicating that the system is halted. Failure to wait for this message means you may be turning off the machine before the hard-drive partitions are unmounted, which can cause file system corruption.
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