Re: run a "show" command remotely against an Equal
I'm not sure how plink works so I can't help you there. I suspect your issue is that since you first have to get logged into the shell before you can run the command. It's not a standalone "show" command that can be run directly.
On the EQL support site you can download PERL/Python scripts that give you the basic pieces allowing you to login, run commands, etc.. It's called "Host Scripting Tools"
Additionally if you have SANHQ installed, you can run a report from there which would include the that information. I believe the reports can be exported to CSV as well.
Additionally if PLINK supports SNMP you could pull the firmware version information that way. The MIBs are located on the support site with the firmware downloads.