How can I sort file names by version numbers?

Question

In the directory \"data\" are these files:

command-1.9a-setup
command-2.0a-setup
command-2.0c-setup
command-2.0-setup

Answer 1

If you specify to sort that you only want to consider the second field (-k2) don't complain that it does not consider the third one.

In your case, run sort --version-sort without any other argument, maybe this will suit better.