[17:03] <CarlFK> installer-amd64 seems to be missing from http://archive.ubuntu.com/ubuntu/dists/bionic-updates/main/
[17:04] <CarlFK> it is in http://archive.ubuntu.com/ubuntu/dists/bionic/main/installer-amd64/ and http://archive.ubuntu.com/ubuntu/dists/artful-updates/main/installer-amd64/
[22:12] <cjwatson> That's simply because there haven't been any SRUs of debian-installer to bionic yet.
[22:12] <cjwatson> Compare https://launchpad.net/ubuntu/+source/debian-installer
[22:14] <CarlFK> cjwatson: got it.  thanks.