how to change permissions for sub folders in linux code example

Example 1: linux give full permission to directory

# Change permissions for the root file/dir only
chmod 777 path/to/directory/
# Or
chmod 777 path/to/file
# Change permission for root dir and all files/dirs within
chmod -R 777 path/to/directory/

Example 2: find change permissions to subdirectories

sudo find /var/www/html -type d -exec chmod 755 {} \;