One approach could be using find:
for directories
find /desired_location -type d -print0 | xargs -0 chmod 0755
for files
find /desired_location -type f -print0 | xargs -0 chmod 0644
One approach could be using find:
find /desired_location -type d -print0 | xargs -0 chmod 0755
find /desired_location -type f -print0 | xargs -0 chmod 0644