Dirk.Net

This error is usually preceded by

sudo: passenger-install-apache2-module: command not found

so you run the full path:

sudo /var/lib/gems/1.8/bin/passenger-install-apache2-module

but there’s no way around the “Rake… not found” error as the phusion install can’t see rake. As outlined here, you’ll have to

export PATH=$PATH:/var/lib/gems/1.8/bin

and then run the naked

passenger-install-apache2-module

again.