Check if a file is really a file, whether a string contains anything, and whether you can run a program with these vital patterns.

Shell scripting is one of those skills that are absolutely invaluable on especially UNIX and BSD-based systems like the BSDs, the two zillion Linux distributions as well as MacOS. Yet not every shell ...

For Linux users, the command line is a celebrated part of our entire experience. Unlike other popular operating systems, where the command line is a scary proposition for all but the most experienced ...

I’m going to go ahead and admit it: I really have too many tray icons. You know the ones. They sit on your taskbar, perhaps doing something in the background or, at least, giving you fingertip access ...

I recently switched to Mac OS X as my primary desktop operating system after spending over a decade on Linux. Although Apple’s operating system supplies practically all of the command line tools I ...

I'm passing a file to my script and then I need to get into a for loop until all the lines are read and manipulated, but what was the simple syntax for reading each line of the inputed file? (assuming ...

Linux Journal, representing 25+ years of publication, is the original magazine of the global Open Source community.

A file of executable commands for Unix and Linux. Created in a text editor, when the file is run, each command is executed until the end of the file is reached. After the shell script is written, it ...