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-redmine-12.0-squeeze-x86.iso.sig gpg: Signature made Sat Aug 18 18:00:26 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 29b03b62f68ff8b7f87892d61446bf81c1308d6d * md5sum 5d1593001b658bec7557f5bd0fc45654 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) iQEcBAABAgAGBQJQL9gtAAoJEIXCXpWhbrlNon0H/jqc7CLlheqZXhvcflNG5IdO gp+8I49lR0XccryHp+mMO9jAM6HkrEOa/HVMzG3Z81q40xaUp4eS3ANsNYVJouqI YiDXeHYY6u5IfYx7UW3vhG88M5gsijYIrk3ow879snES0F/zL5aXfyX8Z2Ek1Kdw IPCHL6UWjByk7388GNwckoe+1dMRl/QRxLhqvaVc2wZzhBsvprf86UIhHTuJQUBj 5Pnmq+KbAWMJie6dSUfBL7eZ3gW67m4vyWzkS/UIv33C5YVvmJtLe4qiPH29slG0 AA4BNIZXOQVQg9LLouLauS3jtm9qbl7/N6Eo1Z0vO7lYfUWWoLO4v0RcpM1iix4= =tsGA -----END PGP SIGNATURE-----