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-i386.iso.sig gpg: Signature made Thu Apr 18 12:58:11 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 38d4fe2a6007224ae8dbef78b54a675328ae877f * md5sum c81cc47bc3196a2aa40368e97877e825 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) iQEcBAABAgAGBQJRb+3OAAoJEIXCXpWhbrlN7C4IAIsKTOa06awWAqdniYMjz1fX DKzKnf0nJoAF258GtpQuuBiSjaahyO7RTRYVzIPqLNm4oZmETxzI03DPugzqcb5A LntRFoHzhv75MR78rvy78r4D2AkwkoYxy4sqspNC6keEn4BOr/yvee/KkEcEvAwT kj1XoSQJmPIzWvH8SwFdg3q0UzyiBSmSSMUhsv61/5UPTfSICbcUEujuACYhAoR2 A5ObIcZscUFmgaZNv0vGvkm3KcyfIgqLSo6EzEN6l9P97TfhSm9OuMTRRCTLzDhx aCcz1BrZKXf8QlBn9uxYvZ4FV6rUuuZlIi8t20IwueE2EYTVo0f/i+jZ+7lXMOs= =yBNU -----END PGP SIGNATURE-----