UNIX Command to recursively change permissions on directories?

Question

I just want to change permissions on directories, not the files contained within.

Answer 1

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

Answer 2

Assuming you're in the directory you want to start in:

find . -type d | xargs chmod 755

or whatever permissions you want.

Answer 3

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