you can use find like
find . -type d -print0 | xargs -r -0 chmod 0755
find . -type f -print0 | xargs -r -0 chmod 0644
The first one to chmod directories and the 2nd one for files
you can use find like
find . -type d -print0 | xargs -r -0 chmod 0755
find . -type f -print0 | xargs -r -0 chmod 0644
The first one to chmod directories and the 2nd one for files