# This starts from current directory and also runs through
subdirectories
find . -type d -exec chmod 755 {} \;
find . -type f -exec chmod 754 {} \;

Be careful where you do this!! From root (/) you will change ALL the
files/directories on the system and some things will stop
working....for example, rsh and ftp may be affected if the .rhosts or
..netrc files get the wrong permissions.

Steve