Issue Regarding Security Onion Installation - Ubuntu

[SOS-H]

Dear all,
plz help me out of this!!
while i am Verify the downloaded ISO image using the signature file it shows the error which i attached
Thanks in advance.

[tomjones1977]

Are you in the right folder? Working on a couple of assumptions here, Ubuntu browsers generally save files to the ~/Downloads folder, so the command above can't find the file to verify against.