Pls list the command or the scenario which will work in Unix but will never work in Linux
closed as unclear what you're asking by Anthon, Stephen Kitt, mikeserv, Networker, Bananguin Mar 12 '15 at 14:54
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There are many variations of UNIX (BSD, AIX, Solaris for e.g.) and many Linux-based operating systems (RHEL, Ubuntu, SUSE for e.g.).
A more practical exercise would be comparing a UNIX variation with a Linux distribution. However, even then, the room for package customization may make it difficult to come up with anything definitive.