The eval command allows you to run the contents of variables as commands and can be very useful, especially in scripts. There are probably a lot of Linux users who have never encountered the eval ...

Want to know the tricks of replacing a variable in a file using the SED command? This article will give you an overview of replacing a variable value in a file using SED. Before replacing a variable ...

The Linux command line offers some very useful tools to enable you to perform mathematical calculations. This post runs through a series of commands you can use and demonstrates some techniques for ...

In our first tutorial on command line wizardry, we covered simple redirection and the basics of sed, awk, and grep. Today, we’re going to introduce the concepts of simple variable substitution and ...

If you aren’t a Linux user and you watch someone who knows what they are doing use Bash — the popular command line interpreter — you might get the impression they type much faster than they actually ...