Comment 3 for bug 1615771

Ack, I left out how I proved my my conclusion above.

I copied the failed to fetch addresses into into the address bar of Firefox ie:

Http://us.archive.ubuntu.com/ubuntu/pool/main/libc/libcgi-pm-perl_4.26-1_all.deb

and received:

"404 not found The requested URL /ubuntu/pool/main/libc/libcgi-pm-perl_4.26-1_all.deb was not found on this server.

Apache/2.4.18 (Ubuntu) Server at us.archive.ubuntu.com Port 80"

I then shortened the addresses to

Http://us.archive.ubuntu.com/ubuntu/pool/main/libc/

and found myself on the archive page for libc where I found the omitted directory /libcgi-pm-perl/

You can substantiate what I found by following what I did above.
'temporary failure resolving "us.archive.ubuntu.com' message is puzzling. It could indicate a network problem, but by doing what I did above I eliminated that as the cause.

I will add this comment to bug #1615771 as well.
I look forward to your questions, And thank you for your time and effort. You are saving this old disabled vet from the machinations of the M-word.