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/Peo, FreeWebSpace.net
Are you the providor? Or are you renting from someone? either way, reinstall a different OS. Depending on your hoster etc, it might cost you, but it will actually be usable.
Not to be rude or something, but i personally don't think there would be someone here willing to trade a solaris vps for a linux vps as most programs are written for linux and not solaris.
Most vps providers give you a control panel where you can change your os on the fly.