After Site or Blog Deployment you need to Set the Correct Permissions on Files and Directories.
-
Open a Terminal window (if your Live Server is Remote you need a ssh Login).
To Set Permissions Only for Files Recursively execute:
find path/To/Root/Directory -type f -print0 | xargs -0 chmod 744
To Set Permissions Only for Directories Recursively execute:
find path/To/Root/Directory -type d -print0 | xargs -0 chmod 755
(Reference).
.