I remember the early days of Linux well. There was quite a bit of interest for it at the University of Waterloo in the mid 90s, but there was also a lot of talk of issues getting it to install, or getting it to run stably on certain systems (albeit not uncommon for any OS at the time). Those were the days of having to know how to compile your own kernel and fight with XFree86.

Linux distributions like Red Hat really squashed those concerns within a short time and made things much easier on all fronts. Their documentation was also excellent.

By the late 1990s, Red Hat was as common as Solaris, AIX, and IRIX at the university, but most still considered it inferior to Solaris. And now, RHEL is the main *nix system used there (a few use Debian).