[ubuntu] How to find checksums for the files

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http://ubuntuforums.org – I downloaded v. 12.10 last night but accidentally closed a window that had the download going in one of the tabs. I believe it had probably already finished downloading, but am not sure. I wouldn't want to download it a 2nd time and waste resources here, but don't want to try and install it if it is incomplete. I was going to run a checksum anyway and that should resolve whether I got the entire file, but I don't see where the checksums for the downloads are listed so I can compare what I have with what I should have. Any help would be appreciated. (Hardware)