New answers tagged mirrors
Yes, it is generally safe. Apt has the packages signed, and verifies those signatures. Ubuntu is based off Debian, who designed the package system. If you want to read more about their package signing, you can do so at https://wiki.debian.org/SecureApt. I suppose a mirror could not tell you about updates when they are released, but you would likely notice ...
From https://wiki.ubuntu.com/Mirrors#Communication if you have questions, email us at email@example.com. You could also try posting to the Mirrors mailing list at https://lists.ubuntu.com/mailman/listinfo/ubuntu-mirrors
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