How to set file permission for web directories and files.

 Step 1:  Login into the Plesk control panel, go to the Website and Domains tab and select File Manager.

Step 2: Navigate to the file or folder you wish to change permission and click on it.

 Step 3: Now select the permission(eg. read,write,execute/search) you want to change for user (eg.owner,group,others) and click "OK".