2.3 Utilities

Question 1

What does cat do?

Answer 1

Prints contents of a file to standard output
Cannot pause the output -> not practical for long files

Question 2

What does more or less command do?

Answer 2

Print contents of file to standard input with paging capability
Navigation is same as using man pages (Space to scroll down, ‘b’ to scroll back, ‘q’ to quit)

Question 3

What does head command ddo

Answer 3

Print first few lines of the file (first 10 by default)

Question 4

What does tail command do?

Answer 4

Print last few lines of the file (last 10 by default)

Question 5

What does grep command do?

Answer 5

Filters file contents or command outputs to print only the lines that contain specific pattern