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-phplist-12.1-squeeze-i386-vmdk.zip.sig gpg: Signature made Tue Jun 4 23:02:57 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 24a5793b0d6da5536b09bdb7c2aad1de947a39c5 * md5sum 93c8842a38fea63e1c441874316625ca 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) iQEcBAABAgAGBQJRrnIVAAoJEIXCXpWhbrlNfmUIAL+JY4S3yzj31/JQHlk8INyS AA3wOuOKJH1JffykKWBl3fqSNOiDOPmfoou7R2JMV2ZcUYicpS71hcxtoLn5bEXc YGUVbI6PEnUuu6J83wC4ddN2Kguj0cGFWk/cbxjrVyHg1ytum7cpoah6dccd6GsG Uhhgc+I346RUVl92YvRrUMh2SuYMneiHEq6f0vgn32NtPQUuxIWMr92WBSUIjpCH B30g9On+nJ+L+IwTsyy8zGnhpUW1r7jHsXa0GtzdRn60Yh7pbBE0RG7Nh8PqRoCN eDic1XENlPzqFlBhWLxQnnOiJq3zsEstvegW9A2jK8t3PMdpfmxaNMLleu9rRvQ= =VoFp -----END PGP SIGNATURE-----