How to use the true and false commands: 2-Minute Linux Tips

How to use the true and false commands: 2-Minute Linux Tips

Assessment

Interactive Video

Architecture, Information Technology (IT)

University

Hard

Created by

Wayground Content

FREE Resource

The video tutorial explains the true and false commands in Unix-like systems. The true command returns an exit code of 0, indicating success, while the false command returns an exit code of 1, indicating failure. The tutorial demonstrates these commands and their exit codes. It also covers practical uses, such as using the true command in loops to create infinite loops that can be stopped with control C. Additionally, it shows how to pipe the output of a failing command to the true command to ensure a zero exit code.

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5 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What exit code does the true command generate?

2

1

0

3

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the exit code generated by the false command?

3

2

1

0

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a common use of the 'while true' command?

To sort a list

To run a loop indefinitely

To terminate a process

To generate random numbers

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How can you ensure a failing command returns an exit code of 0?

By using the false command

By piping its output to the true command

By restarting the command

By using a try-catch block

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the exit code when a non-existent file is piped to the true command?

It becomes 2

It remains 1

It changes to 0

It is undefined