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-typo3-12.1-squeeze-amd64-vmdk.zip.sig gpg: Signature made Tue Jun 4 16:39:59 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 586e8ba72f8036d4c5a4fc2a730342f016bb06a7 * md5sum ff294d2b3d2a363bb075dbc60e4615f4 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) iQEcBAABAgAGBQJRrhhUAAoJEIXCXpWhbrlNEJ8H/0yOc1GAsOwVYNKHwFtRT8Se u+kwgtYsOzSkd9THdmdQtM+DPc9ck515C538PEBdpMCncnWUjC5fLMNBHlxbEw2W H53CkZ5RjRzG/tLpE6bptUGb1zgSqChyF5b8REiGPo4oBJq8EF9LlaHsuT6E3f14 0LrewviLYpWZPtOp6f66swV3U5bLThEXa9IbFepuG2gGD/WTP3LrtGK66W+QuMEl OP0gMZWEaaUTdwa6h1/3s78n9q00Ke31w4dNB7m6Prcry/NndY5jgI+0o7e9Vi8U Vz/+CFgKz4CVccRKSzVDcnzoHR13zyMtcGVUkmF33Mgx1M9G1DuIAAe0aESHg7Q= =BDse -----END PGP SIGNATURE-----