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-icescrum-12.1-squeeze-amd64.iso.sig gpg: Signature made Wed May 1 17:10:22 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum c20a0ecdf67f63276d6558f9e01d6e94a1d74e68 * md5sum 877fed9a56ea3e163601e5770c6459e0 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 v1.4.10 (GNU/Linux) iQEcBAABAgAGBQJRgUxrAAoJEIXCXpWhbrlNUkgH/jEP2DhH5urhUKP9VPhUcweW rVarmcA5iMnx3LFUAwyvWhROpkc8fDe/d7jApnicvVvbGozqFYF9SX/SFADrsS7u 6KLYVEhjksghFmnVe+TXg/BHTOL6U4k81jvI4k1aK1c8D8/QJlZqqYLTxg+emIXk pTm1ylOwO4gyAZZWivtQsnSr+VYrz7nEAuB6W3CgpZTEW+5ddWGhipSeZXz7GTy+ UHB7Crjcvkw0mNUuZqg313I/fTTbml+dFmBPoXup9fDD5jVM4LMsJ78XSY6KyIdJ FoZ7YnkrVN8hjbiDx9awEzokpbDG8FnQAzO4XaqrDG0aG+oQ2K1Khnd+qy2uj1A= =5YfW -----END PGP SIGNATURE-----