How to change permissions for a folder and its subfolders/files in one step with Chmod

change permissions with Chmod

Use Chmod in the terminal – 

To change all the directories to 755 (drwxr-xr-x):

find /opt/lampp/htdocs -type d -exec chmod 755 {} \;

To change all the files to 644 (-rw-r–r–):

find /opt/lampp/htdocs -type f -exec chmod 644 {} \;

Go to a directory such as htdocs and do this – 

sudo chmod -R 755 /opt/lampp/htdocs