all domains on CentOS VPS point to REDMINE subdomain

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http://serverfault.com – I installed redmine on a subdomain with the bitnami stack and now realized that nomatter what domain i go to on my server i get the bitnami welcome page and i can actually go to anydomain.com/redmine and access the redmine! a friend suggested this is the passenger file that needs fixing, but i actually have no idea where to start looking! all of the redmine files are confirmed to be in the subdomain directory. would some apache rewrite files in the subdomain be able to rewrite the entire server? where else can i look? thanks! (HowTos)