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-xoops-12.1-squeeze-i386-vmdk.zip.sig gpg: Signature made Wed Jun 5 01:17:19 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum c0abfffcc9f451c7c6d55050c1404536d051a37b * md5sum 8855af52564bc43df7420242ff719f28 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) iQEcBAABAgAGBQJRrpGSAAoJEIXCXpWhbrlNIiEH/3H1n9Ek+c6i8V/7DGrCUt1o hhDszWaKI9L/PsrPWTcCmiiuPm+zvn+nl2ANNwXuGJRcdzaEuowRqCurp8N+3Hgg rDC5uPz0D3GzVjTlrx0eAYNbEsVFFPtmwh17b6dKrOuYEaX5Xk4gBfynm+XEddDX rO5ul7frFifWKsSS/6+konBFEA4H97Wpboc/PV4vHjRgBRJ2j3kxR/MZZn0WkU0i gd+f/+gfShN3TK1aCecTg3kNEKej90drgTA01bt3cjGl6Ah8T6UVNNyzhOEHmx8S lL2qmGabI+J3t4qzmvt56sYc9GogH4HVlP6gfP6LGHbR9xcYx82N7EgXPGEBbrY= =Cmfi -----END PGP SIGNATURE-----