Find a folder:
find FOLDER -type d -iname FOLDERNAME
Find a file:
find FOLDER -type f -iname FILENAME
Find a symbolic link:
find FOLDER -type l -iname FILENAME
Quickly change directory permissions:
find . -type d -print0 | xargs -0 chmod 755
Quickly change file permissions:
find . -type f -print0 | xargs -0 chmod 644
