I just finished writing my third e-book about Perl one-liners. Perl one-liners are small and awesome Perl programs that fit in a single line of code and they do one thing really well. These things include changing line spacing, numbering lines, doing calculations, converting and substituting text, deleting and printing certain lines, parsing logs, editing files in-place, and many more.

I just wrote my first e-book ever about AWK one-liners. AWK one-liners are programs that fit on one line and do one thing, such as, numbering lines, printing certain lines, finding sums, etc. The book is 50 pages long and contains 70 well explained one-liners.

Using awk scripts expands the possibilities with awk and provides an easy way to repeat searches on a number of files.

The guide aims first-time users and average Linux users and its goal is to make you learn your way around when using the Linux command-line interface (or CLI for short). It also encourages some habits which I believe that, although hard to learn at first, will make you more productive later on.

Guake - Quake-style terminal for GNOME
A Quake-style terminal is a drop-down terminal which can be shown/hidden just like the console in Quake (and most of the first-person shooter games out there), using the press of a key (~ in Quake). Guake is a terminal application written in GTK which uses the F12 keyboard shortcut by default to show or hide it.

Here's a list of 10 commands which may come handy when using the command line in Linux:

Scripts are files that contain shell commands which may be short or can be very complex. Scripts just make it easier because you can invoke one command to run all of the commands in the script. Here instead of using 8 separate commands you can use one command to execute all of them.

The Bourne Again Shell (bash) is the default shell in almost all Linux distributions. The bash shell has a history feature which can make life easier for any serious Linux user.