Here are the commands to change directories permission recursively to 755 and files permissions to 644 recursively:
To change directories/folders permissions to 755:
$ find /opt/lampp/htdocs -type d -exec chmod 755 {} \;
To change files permissions to 644:
$ find /opt/lampp/htdocs -type f -exec chmod 644 {} \;
Where, /opt/lampp/htdocs is the location of directory. You can use “.” without quotes to scan and change under current directory/folder.
