The first line writes "hello world" to the file "output", the second reads it back and writes it to standard output (normally the terminal). A "here" document is essentially a temporary, nameless file ...

If you're reading this publication, you already know that Linux is one of the most powerful and versatile operating systems available today. If you're an old-timer like me, you also know all about the ...

If you have any experience with the Linux command line, you’ve probably used a pipe to solve tasks by combining simple programs. It’s the UNIX way. A pipe connects one program’s output stream to ...