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as root user, I got an error message saying that the package could not be found. I think the problem is that I haven't added the repositories. What are the repositories I should add to my sources.list file? Where can I find the list of repositories?
Raspberry PI 400 Distro: Raspberry Pi OS Base: Debian Sid Kernel: 5.15.69-v8+ aarch64 DE: MATE Ram 4GB Debian - "If you can't apt install something, it isn't useful or doesn't exist" My Giant Sources.list