This is actually a good question. Why use Solaris, when you can have Linux? Solaris is a commercial system, the hardware support is scarce. But if you are reading this you have probably already decided on using Solaris. If not, here are some reasons:
I have a part-time job administrating Solaris machines. It is of no use that I learning all the neat command parameters and nifty Linux tricks at home, when I can't use them on my Solaris-Box.
Sun was giving away Solaris for what they call ``Shipping and handling cost only'' for some time. They might do that again. And almost-free-of-charge is always a good deal.
Please back up any data before messing with your system! A lot of the things described in this document may result in excessive data loss! I am not responsible for any data loss! See also section Legal stuff