[OS:N:] Windows to Linux case study

[Jeremy Hogan <jhogan redhat com>]

A typical situation, with a pretty good result for these folks.

"Nearly three years ago I rebuilt my company's corporate network,
comprising six geographically dispersed offices and approximately 300
users, using a budget smaller than what most system administrators and
IT managers make in a year. Our migration to Linux servers and software
was a success, and offers a lesson for other administrators.

When I began, I had quite a mess on my hands, and I don't mean the kind
that our company, a maker of water treatment products and services, was
accustomed to cleaning up. I encountered problems such as not enough
memory for the servers to run their services and not enough hard drive
space to accommodate growing data needs. We did not have enough licenses
to support our company user base, and Microsoft was contacting us to
request we update our licenses and become compliant. I was also
experiencing unplanned down time at least once a week, and suffering
with an inadequate backup system, a shaky T-1 line, and no security --
not even a firewall. Our company lacked a single corporate email system;
out of 300 users, approximately 50 were using Exchange Server; the other
250 were using AOL or another ISP...."

(more)
http://www.itmanagersjournal.com/software/04/01/09/2231250.shtml