The Linux command line ... Shows us the result of the whoami command we have previously issued, also known as command output. This command simply prints out the username of the current user. Line 4: ...

One of the most valuable utilities offered by Unix and Linux ... The wc command will return four values: newline counts, word counts, byte counts, and the maximum line length when executed with a file ...

Trying to read the man pages for the utilities most frequently seen in these extended command chains didn't ... intuitive and useful: simple pattern replacement.