shutdown:tldr:002f0

The command "shutdown -r now" is used to instruct a computer to reboot immediately. Here's a breakdown of the individual components:

• "shutdown": This is the command used to schedule a system shutdown or reboot.
• "-r": It is an option that specifies a reboot action. It indicates that instead of shutting down the system completely, it should be restarted.
• "now": It is a parameter that indicates the command should be executed immediately.

By combining these components, "shutdown -r now" tells the computer to initiate a system restart immediately, without any delay or warning.