This signature file may be used to cryptographically verify file integrity, like this:: $ gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys 0xA16EB94D $ gpg --list-keys 0xA16EB94D pub 2048R/A16EB94D 2008-08-15 [expires: 2023-08-12] uid Turnkey Linux Release Key $ gpg --verify turnkey-canvas-13.0-wheezy-amd64-xen.tar.bz2.sig gpg: Signature made Fri Nov 1 08:54:38 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 73df4dac52e97aee29ec35d78b8c5b71017f5e2a * md5sum 271a75d9e48e208a3be05cf36f907f18 You can calculate these on your end and compare to check for errors, but cryptographic verification is recommended for security reasons. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAABAgAGBQJSc2w5AAoJEIXCXpWhbrlNXSoIAJbmxOcOdOxf3enuw6lGs4Ti /nKKsoNcq/KBYKr+zDeS3tT23W1+YyKoqYuu0UuHC/gezEcgCsKnkIhC9IXTV06m ra9wUiG0ICjyrCd+llEqqyzyEMn7ddbzvDpksEeVgJZtp9kBcNtHqPYePKrRTmhT 11L1FwqV1I1m038FyoJZAb0VhT/zPv+PrYfs2fs40Wv8KhGcYpuXUS1CF4Y7P958 +Kkt0YowZJiDKBOhCbl73zw3h/Y+JVfWEAfLTqS+uDNNxD0UhJLEXkh3+OSMNJVN StepFejgPR+1LUKv8O/Y7WO237RyWLdCvIxP9EEd+zi+t02/mOwyKZpb40RtTYw= =/Io9 -----END PGP SIGNATURE-----