Linux Command Line Pipes and Tail Command

Test your knowledge on the usage of the tail command and command line pipes in Linux. This quiz covers how to use negative and positive values with the tail command, as well as the usage of the pipe character to send the output of one command to another.

Created by

@UnselfishElegy

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Questions and Answers

What does the > character do when used to redirect the standard output of a command?

It overwrites any contents of an existing file

How can the contents of an existing file be preserved when redirecting the standard output of a command?

By using the >> character

What happens when the number 2 is placed before the arrow > character in redirection?

It redirects standard error to a file

What does the >> character do when used in redirection?

It appends to a file instead of overwriting it Signup and view all the answers

What does the negative value option (-n) do in the tail command?

Show the specified number of lines from the end of the file Signup and view all the answers

What is the purpose of using the pipe character (|) in command line?

To send the output of one command to another Signup and view all the answers

What is STDIN in I/O redirection?

Standard input, or information entered by the user via the keyboard Signup and view all the answers

How is I/O redirection achieved in command line?

By using the arrow < > characters Signup and view all the answers

What does the ^ character signify in regular expressions?

Beginning of the line Signup and view all the answers

Which command is mentioned as also supporting regular expressions besides the grep command?

more Signup and view all the answers

What does the pattern 'r..f' match in the given example?

Any line that contains the letter r followed by exactly two characters and then the letter f Signup and view all the answers

When would the $ character match in a regular expression pattern?

End of the line Signup and view all the answers

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