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-magento-12.1-squeeze-i386-xen.tar.bz2.sig gpg: Signature made Tue Jun 4 22:19:49 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum d18d6435e6fae7435536b396b915bac4875dcb6a * md5sum 85da129a638ec6f5104323f7325ef6eb 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) iQEcBAABAgAGBQJRrmf5AAoJEIXCXpWhbrlNLWsH/j71OxUJDY8El/+QOx3/NaQ7 jWcrPsCKZXQN/c/qubXz1Kt4t7IVmKM86OVUwuosefByKMwD941Fj9QrgTrvwRyA AderX2ZFmjDvpEdXlAIx7GP9OodaqmxgK2Qs+BlLosjZB9feNIka7AGd3kRMAZ1R k0H26+20acH1K9b9Ip+3ney0E7enzFB8jJLrAdG0qCPBkMD3XITPWSdCcExlHFx4 +QbiPtKrVeq3id2Zqwbvm6z/zE5ODZh3sqcSbig+SiU44sRled1ff6AAbAQ2A6Hv lSR7xOtuv5S4CDCRMi/m0eNhFiy3kJipB7LBAsKM5a2iEplGfyLraG/AgM3I2DA= =1yFO -----END PGP SIGNATURE-----