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-gitlab-13.0-wheezy-amd64.iso.sig gpg: Signature made Tue Oct 15 15:35:34 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 0b0e137718a6cd065e1858da8fb44d1aa6acf9c8 * md5sum 0898f55603ecd7a11e3faf402c497c58 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) iQEcBAABAgAGBQJSXWC1AAoJEIXCXpWhbrlN1OYH/2Wq5T6vhxSkmpU+FJ83vIk1 tRnJZ4GbN8Lgm1kT5afe0LJ4EDl9XSCjCD0d6809SXqP0ZZfqRy0eZ+HWP5UiHAa 8NxduFD0UHUOULZ49JYThBgqmmidnvOxQ43sQZmpwMeBnzAZDQEEoB/n05aBtvy8 6XR/GxfQI4abwmDBGPn0hNArbKkqEyP6zvWU/JCWF+Ek8f5/k5sG7x70wNR/0E0G /Ba/VUlDjjSbEdL7c7txaIc95hBEpemhbLUqSERVl3AnTmcs8iqMiAEYAjUQkwga ORKwUqqMm5dxL236yxAzDl9pbrR2VLpCzt5tjHRlLNTqOXBjCYzg5RKScHtXs2A= =9rYx -----END PGP SIGNATURE-----