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-tomcat-apache-12.0-squeeze-x86-openstack.tar.gz.sig gpg: Signature made Tue Aug 21 16:38:47 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum d611dcc74a0d0ba2ded65cfff4165861ef636c16 * md5sum a27690d116208457068c19e745ddf416 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) iQEcBAABAgAGBQJQM7mJAAoJEIXCXpWhbrlNHL8IANebWDq7N1+O/qnCIy93tJtX v4TxkquHnaCbs1kcLwfyC9cwilOVHSd1m9levwkUepRLLwgbqhTLTS2wmzY2PwC9 iPZ7/w9ZReZI9YQ7nbTksFTu8oQ26j2c/grj0Bewp6s/yOi2Kc2RtC1j96hPS8lE OcfuWCwKbNWQ/PoQqAn+sMLA7RrPmEx1vgJ8w5UwobXUntpFBPJmZx3Qb2do5uyG m34lX2SnJR/+LBAz/xrvLOWeBM6i4QiV9Hh4+WL86YDJkwWkRQzMB/MtYhXkOnFs +A1og71kHXmkv5aBFXu/Q4KoqeaIhbjqbOq2wUeI001QYJyaMn+5J0At3Qf2Zuc= =wetP -----END PGP SIGNATURE-----