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

Old post, but... ls -l --sort=version may be of assistance (although for OP's example the sort is the same as done by ls -l in a RHEL 7.2):

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

YMMV i guess.