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-b2evolution-12.0-squeeze-x86-vmdk.zip.sig gpg: Signature made Tue Aug 21 11:28:49 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 09b3980637d1e9d54ab252015cf00cb27a848c40 * md5sum 87590011bd7419d9372bd1a55df96b57 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) iQEcBAABAgAGBQJQM3DlAAoJEIXCXpWhbrlNTDMH/A3VmJBfGxBSghhKcIo6N1+j TovvHy0O1RBHS4Iwj5KVVcjbEu+ClMWZ4IMh4gSrkfSQUaoj++MyV/z3rta9twmc pz/60f+82gWbQxX+i0ihb+tqtoLNJQUr9wizIqtHUYlcLyLLosdEaGd6MuFB+/rf E4u7OU6FBrLTCa6rn0eIQECJPcRyiPijCbiLPlCOhpSxHYdFaC13iE/42c/mkbG1 fEF881nEJYWVIWwljz74b08/h5XkpkXH6rixJg0XIpY4e1+ZqfLvZNiookcDVltg eTdSiIfx3Dcjuu2N8juzFGydoKl7HTX3+uqxjMIyWOnDwfa8XzbolwAnqfWa+nw= =6+zN -----END PGP SIGNATURE-----