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-zencart-12.1-squeeze-amd64-ovf.zip.sig gpg: Signature made Tue Jun 4 17:07:21 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum e98c703620674585fc02c9a4d150a2635c13a95f * md5sum 49e11cfd9b15c63ab09981627e730206 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) iQEcBAABAgAGBQJRrh6/AAoJEIXCXpWhbrlN/1YIAOuItefmBWLjQAWuH+9gh55q D0PsLfc9XOW3/95/Bgzdya/8J1Keu3kz62vJmCx2j7TXZN7QOqwq7SHLUYH8zQDj eSIDcMKi3V9B06fj2Bu/ayy1N3MeWDIEpKYhlWcELr8qTQa2X1fJNJxsi7mmDBFm QiIXfoNE7GBs8NVxm+637qo/7T359VtXmd4C4wh5kuGU3WH0EmSoTVUNoxLAkhI5 kP1Sw3tSguSXY08mXmcpzyNZ3BATAQRroh55Fi7VF4AwnbFt9CkXRjC8p5PegnLH y2Df16xnEYyzYr9XJr7lxmnijctYLtOWeVVPfwCSeeACMqqYkjgcI2B6ywv8ZO8= =7x58 -----END PGP SIGNATURE-----