Category: BASH Shell

The regular expressions simplify our lives. For example, if you want to remove all blank lines (empty), instead of writing any scripts or programs, you can simply use the …

My VPS is running at Ubuntu Linux. The Apache2 Server is serving 6 websites. If, on errors (e.g. out-of-memory), the websites are down until the apache2 server is restarted …

Linux is a very powerful but tricky Operating System. One tiny mistake on configuration can lead to crash or system hung up. In this tutorial, we know how to …

Bash Shell is powerful. We can accomplish many complex jobs based on the abundant commands. This tutorial presents a Bash shell to check a given number to see it …

There are many ways to show line numbers when displaying text files. For example, in this article, we know the utility nl can be used to show line numbers …