How to Run Apache as different User with mpm-itk

Run Apache as different User is quite useful in WordPress development and WordPress hosting.

Apache runs as www-data in Debian/Ubuntu.

However, this is not convenient in a WordPress installation:

On the production server

• Many WordPress files must be owned by the SSH/SFTP user in order to apply changes
• Most WordPress must be owned by the Web Server user, so WordPress updates can be applied