rushrush is a replacement for the unix shell (bash, zsh, etc) which uses pure Ruby syntax. Grep through files, find and kill processes, copy files - everything you do in the shell, now in Ruby. Previously if you wanted to count the number of classes in your project, you might use a bash command like:
Bash＆シェルスクリプトを極めるテクニックまとめ | OSDN Magazine
