The eval command allows you to run the contents of variables as commands and can be very useful -- especially in scripts.

Another special variable that you might have encountered is the status variable, $?. In a script, this contains the return value of the most recently executed (external) command. This is where you ...

One crucial component of the Linux environment is the PATH variable. It's like a guide that directs the system to where it can find the programs you're asking it to run. In this article, we will delve ...

Testing variables There are quite a few ways to test the values of variables, but the operators you need to use depend on whether you’re comparing numbers or strings.