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-mambo-13.0-wheezy-i386-openstack.tar.gz.sig gpg: Signature made Tue Oct 15 16:52:43 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 4e7473e7d5af3f657d799d5243e561ee559d7c10 * md5sum 199caee9d360f2ff82ad4f1d46ec8b3e 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 v1.4.12 (GNU/Linux) iQEcBAABAgAGBQJSXXLSAAoJEIXCXpWhbrlNX9EIAMdY8+UnbG2sLkzV8ypAZRWs DnVu9OXdngJd4RgC2iloHybFue4KMHq5AupqkrUdeBpuTAtFrykDLXgaEaQlrxwT iWaL1SRCJbb0cNisKlcvYesoFKN6Bm2s02OpJcTDPgAVsULuVw71fHPF8m7ZzMbS eoL7nKxj9Du7Ok3ogKkPp2X1/c96HG8wTTc/J0aREN1kMO7M+Ag49yfzDPXr2JI9 xYGZs00Mc+8fbA2VfRQfvlEmD2Xx+NUwzKveDeLim5XRqUXF/XAsj37WkOqa5Lqu gsHq6bbKRXKhTf3PLrtSOW8l6ouEGiwwRqu76VxXcuOC1VZo1N6VMMRiVzpZ0fQ= =OQKD -----END PGP SIGNATURE-----