Linux Crash Course for Beginners - 2023 - System Maintenance Commands

The video tutorial covers essential Linux maintenance commands used by system administrators, including shutdown, init, reboot, and halt. It explains the different levels of system shutdown and reboot, ranging from zero to seven, and provides a practical demonstration of rebooting a Linux machine using Putty. The tutorial emphasizes the importance of knowing the host name before performing system operations and explores the options available with each command.

What is the purpose of maintenance commands in Linux?

• To reboot, shut down, or change system modes

• To manage user accounts

• To install new software packages

• To update the system kernel

What does the 'init' command level 6 do?

• Shuts down the system

• Reboots the system

• Brings the system to single-user mode

• Brings the system to multi-user mode

Which command is used to immediately shut down a Linux system without considering running processes?

• init

• halt

• reboot

• shutdown

Which command is used to reboot a Linux machine?

• shutdown

• reboot

• halt

• poweroff

What is the first step before executing a reboot command on a Linux server?

• Clear the screen

• Log out all users

• Verify the hostname

• Check the current directory

Which option with the 'shutdown' command is equivalent to the 'halt' command?

• -H

• -P

• -S

• -R

What is the function of the 'shutdown -P' command?

• Powers off the system

• Halts the system

• Switches to single-user mode

• Reboots the system