Linux Crash Course for Beginners - 2023 - History Command

The video tutorial explains the concept of shell history in Linux, highlighting its usefulness in troubleshooting by tracking all executed commands. It demonstrates how to use the history command to view past commands, including those executed incorrectly. The tutorial also covers methods to re-execute commands using their history number and advanced usage of the history command with grep for filtering specific commands. The importance of using the man command for further exploration of history options is emphasized.

What is the primary purpose of the shell history in Linux?

• To record every command run in the terminal

• To delete old commands automatically

• To prevent unauthorized access

• To enhance the speed of the terminal

How can you retrieve the list of commands run by a specific user in Linux?

• By using the 'commands' command

• By using the 'retrieve' command

• By using the 'history' command

• By using the 'list' command

What command can be used to view the history one page at a time?

• history | tail

• history | less

• history | more

• history | grep

What does the history command record besides successful commands?

• Only commands run by the root user

• Both successful and unsuccessful commands

• Only commands with errors

• Only successful commands

How can you re-run a command from history using its number?

• Type 'run '

• Type '!'

• Type 'redo '

• Type 'execute '

Which command can be used to search for a specific term in the command history?

• history | locate

• history | search

• history | grep

• history | find

What is a recommended way to learn more about the history command and its options?

• Read the Linux manual

• Ask a system administrator

• Use the 'man history' command

• Search online forums