Scalable Infrastructure experts blog.

In order to search for a pattern string in all files under a specific directory you can use following command: find $dir -exec grep $pattern {} \; -print just replace $dir with the directory you want to start searching in and $patter with patter you are searching for. for example: find /etc -exec grep support {} \; -print

To permanently change editor in Linux do following: edit your shell configuration file, for example, bash configuration file is ~/.bashrc To set editor as VI: export VISUAL=vi or to set nano: export VISUAL=nano to start it run: source ~/.bashrc