Debian 12: The repository CDROM does not have a Release file Created: -Wednesday, August 16, 2023 11:45:11 PM Latest updated:Wednesday, August 16, 2023 11:48:56 PM views(105) It's just saying that it won't find packages in the CDROM (likely because it isn't inserted?), but normally you'll install them from the online repo, so you should just comment (add leading #) the lines referring to the CDROM, so that the only lines active in your sources.list are those referring to the online repo.