Indeed, for me GNU/Linux was always a cheap way to have UNIX at home, given that Windows NT POSIX support never was that great.
The first time I actually saw GNU/Linux powering something in production was in 2003, when I joined CERN and they were replacing their use of Solaris, and eventually alongside Fermilabs came up with Scientific Linux in 2004.
Later at Nokia, it took them until 2006 to consider Red-Hat Linux a serious alternative to their HP-UX infrastructure.
The first time I actually saw GNU/Linux powering something in production was in 2003, when I joined CERN and they were replacing their use of Solaris, and eventually alongside Fermilabs came up with Scientific Linux in 2004.
Later at Nokia, it took them until 2006 to consider Red-Hat Linux a serious alternative to their HP-UX infrastructure.