Every linux user must know grep, the command-line text search utility. This tool prints lines matching a given regular expression in files or standard input. For those using grep over multiple files, I advise you to give a try to Rak.
Like grep, Rak is a text search utility. Unlike grep, it parses by default all source files in the working folder & its sub-folders, it groups matching lines by file and it highlights the text matching the given regular expression. In other word, it’s a Grep under steroïds and it just rocks!
Here is a screenshot showing Rak in action:
Rak is written in Ruby and available as a gem. So, just “gem install rak” and you’re ready to go!