By the time I learned LINUX, it would be obsolete.............................
Given UNIX has been running since 1960s, and show absolutely no signs its going to stop being used.. I highly doubt that.
Linux “inspired by/Derivative” or whatever you care to call of Unix, has been around and running since 1991.
I think you’ll likely be dead before the last instance of Linux is shutdown.
“By the time I learned LINUX, it would be obsolete.............................”
Actually if you can use Win XP or Win 7 you can fly right away on the newer Ubuntu or Mint. The Mint is almost a direct replacement for Win 7 in how it operates and feels. :)