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-mongodb-12.1-squeeze-i386.iso.sig gpg: Signature made Thu Apr 18 13:10:52 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 23249c53b7ce6be7be597e2adc2b9ff2c173e80c * md5sum 614ce357f94dfd5ec51788aef5bae3a7 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/DTAAoJEIXCXpWhbrlNa2wH/2pE3MR+vE/e2GyzkeRaJW2a o/7ZVuPLLiCQ32XGSbMI7QLzVjem4czXDnulotAXSqZa+aS+dYyu2Kdc5bUXcDuM Uur2wCrcfFxMsAUwSNlBBdgAFomkrM8Sp3IlNaKoot85OydKtRQ9a3aHueuF442N gKqeBb7cRkCPzNX31Ec0HbDJXXsF0283+cH5Rq5cT+/iyBguerV5vlJphHpxGvSP 6lGu4blBoA/JqQLNwqt0mD0acfsRZpAJzuALneO5T7V6p73GQpqoTnDnn73mcKSI rTwYZBECyZbUWKDHahZF2WfuUPjhjHjzGZ/tXDvLtLG6Xytxbau0cxNJ63jA4EE= =+J0i -----END PGP SIGNATURE-----