Stopping the System

The shutdown command is the safest and most thorough way to halt the operating system. When you designate the appropriate flags, this command notifies users that the system is about to go down, kills all existing processes, unmounts file systems, and halts the system. The following methods for shutting down the system are covered in this section:

• Shutting Down the System without Rebooting
• Shutting Down the System to Single-User Mode
• Shutting Down the System in an Emergency