Unix is old, Linux is new.
Unix has been used since the 70's by AT&T and Berkley. AT&T allowed the Unix code to be shared, thus BSD was born. Then other big compaines got into the game in the 80's. The compaines made it to run on proprietary hardware like Digital, HP, Sun, IBM. Each company has their own flavor of Unix but have more similarities than differences.
Linux is based on Unix. basic commands are the same. But Linux runs on i386 hardware. Other Unix's ran on i386 hardware in the late 80's / early 90's but were not free. Linux came out and was free for the i386. Right place right time and the rest is history.
Last edited by DotHQ; 04-15-2008 at 02:55 PM.