Shutdown -k is the command to send the above shutdown warning message, but doesn't actually shut down the system.
In Linux operating systems, the shutdown command is an instruction set that is used to turn off a system in a secure way.
Also, it's designed to alert or notify all logged-in users that the system is shutting down, and login operations would be blocked subsequently.
Generally, shutdown -k is the command to send the above shutdown warning message, but doesn't actually shut down the system.
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