I want to upgrade my distro from version 14.10 to 15.04, for this I've used software updater utility to perform this upgrade. One or two days ago software updater could download some new packages but I stopped it to resume it later.
Today, when I launch software updater, it fails in phase
Setting new software channels, here's error message:
W:Failed to fetch http://ir.archive.ubuntu.com/ubuntu/dists/vivi/main/binary-amd64/Packages 404 Not Found , W:Failed to fetch http://ir.archive.ubuntu.com/ubuntu/dists/vivid/restricted/binary-amd64/Packages 404 Not Found , W:Failed to fetch http://ir.archive.ubuntu.com/ubuntu/dists/vivid/universe/binary-amd64/Packages 404 Not Found , W:Failed to fetch http://ir.archive.ubuntu.com/ubuntu/dists/vivid/multiverse/binary-amd64/Packages 404 Not Found <!-- I've skipped simmilar lines --> , E:Some index files failed to download. They have been ignored, or old ones used instead.
What does it mean 404 Not Found? Have that packages been deleted in the server?
I am now using Iran server, could this problem be solved if I choose main server?
However if you hit this address by your brower, you would get 404 not found too.