To recursively give directories read&execute privileges:
find /path/to/base/dir -type d -exec chmod 755 {} \;
To recursively give files read privileges:
find /path/to/base/dir -type f -exec chmod 644 {} \;
Or, if there are many objects to process:
chmod 755 $(find /path/to/base/dir -type d)
chmod 644 $(find /path/to/base/dir -type f)
Or, to reduce chmod spawning:
find /path/to/base/dir -type d -print0 | xargs -0 chmod 755
find /path/to/base/dir -type f -print0 | xargs -0 chmod 644
Cradit
http://stackoverflow.com/questions/3740152/how-to-set-chmod-for-a-folder-and-all-of-its-subfolders-and-files-in-linux-ubunt
http://superuser.com/questions/91935/how-to-chmod-755-all-directories-but-no-file-recursively
