find / search / cerca - http://www.binarytides.com/linux-find-command-examples/
Cercare per nome case insensitive:
$ find ./test -iname "*.Php"
./test/subdir/how.php
./test/cool.php
Cercare per nome del file:
$ find ./test -name "*.php"
./test/subdir/how.php
./test/cool.php