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-bambooinvoice-12.1-squeeze-amd64-openstack.tar.gz.sig gpg: Signature made Tue Jun 4 12:30:37 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 6dd36a093616444369e7565b951764521b65debd * md5sum 30cd539dfb15a1582bf40edebe348ae9 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) iQEcBAABAgAGBQJRrd3lAAoJEIXCXpWhbrlNEtQIALbl8k54MYKiY6GBuv8rCYdd hlPx/MWLoFTTRY9Dl7eZ8tNP85pjvbrftRumP7KdWx5aukkSAjoh+i3ZS2YeMa4f Li3dunouNPnDd+6OrvEPsoL1PVI8pTvUUxVoW4rzK+H/xkYTfMraoXIs0+cddGop d5N0HLX6HpxefHr3U8xnfDAjoLsBWy97Rw3sHCODcWjvyGzQI3t5x8AvdBuiHQ5N joxYxj+x6y0OokZavcIthNbpE/akX0Xd0tVYX5KN2EWMsxNDAshimdPCYBlEmGNp 9xKpTIP6ighVA2ipq1ZatvY0YbXHalvZGulv1CyGqHKBCdF6EIfHfbFPgTay864= =ipeE -----END PGP SIGNATURE-----