Linux find & replace HowTo

Find and chmod files or folders

find . -type d -exec chmod 755 {} ;

find . -name "*.php" | xargs grep -niP 'thingy'

Find a directory and display on screen

find . -type d -name 'linux' 2>/dev/null

Find/Grep for a string across multiple files with different extensions

find ( -name "*js" -o -name "*jsp" -o -name "*jspf" ) | xargs grep -niP 'thingy'