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-i386-openstack.tar.gz.sig gpg: Signature made Wed Jun 5 01:18:00 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 5880907857058fbcdbe0f3c246b8ab433080c9b1 * md5sum eedd1cd368f3123cf72504808e648792 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) iQEcBAABAgAGBQJRrpG3AAoJEIXCXpWhbrlNkT8H/2fik+Zsr/dkv+Mw/4omMETq /4u8cPKA9WAJFush7fh3Bj21Go8ogu9+wh2BSm+njelqZ0IiyDf2iKv5TabcHTW0 SeKmomIE8FKr4R8tRChP1uH87E1lNGWw9tl6bLeoJ4FLBXC8AClbv3Sagboc6AKy M9plDCy2TVi4ADaJxRKL3zSiApTD9387lANaHgTK9pgVrVUzrzGlRzBvglwSTpCC VaDCcph9ZKzSYxUzxoD/n+6RF5U0zf5vxySwqOltdytHT09y+wbAVwarOAkWeCLF 7B/av/isBP7Bz15FZnqhQhAC6L5Y0QJfnQ2XRLYiDDwvot/MAQy1zyTFC4N/YU4= =YHL/ -----END PGP SIGNATURE-----