The problem is that with those scripts, OpenACS is installed in a strange way, perhaps because of NaviServer (that I've never used). For example it creates a user 'nsadmin' and the OpenACS directory is in /var/www/
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I always used to install OpenACS in Ubuntu 10.04 LTS (and I've never used to have big problems) but now I can install on my VPS only Ubuntu 12 or 13.