Well, that's an original username that is sure to raise an eyebrow or two.
Plesk is a control panel for real admins. There are no easy whm scripts to update eveything, show processes and system health (even though some of those things are super cool). Plesk gives you no support too so it's up to us to fix their bugs on new releases rather than wait for patches etc. What I'm getting at is that with Plesk, the administration of your server is intense and hands on.
To get PHP running as user, you will need to recompile php with phpsuexec.
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