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-observium-13.0-wheezy-i386-openstack.tar.gz.sig gpg: Signature made Thu Oct 17 18:22:09 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 9cb8de2967e8f7beb233a711805a294ee286dbaf * md5sum aaed7b84a54cfec9220b221faca1793e 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) iQEcBAABAgAGBQJSYCrFAAoJEIXCXpWhbrlNnZIIAOGHXY/I7/bTEesc2Ttn3OPU pwcvUG1MwkMRwKZXZMuLA10gGGD8cJFSHyDVBMqkgGPZoam2biT8I0EUD68oXz6L C1eyiAi/4wu+8Llg5rcujOwDHdOoQm2eCVe79J4PLGdamtgE2ylJ43JT6xN2ymEa wLt8vjernWfUwQxU3Wuthz+49iH24vtgUX5EVEJdKO84XRQn1wmOOAyFvubz9U/2 VNq8Pr8ManuMEruFGm/FJWtEjk/ndkoxsQFWbsJfKuhhRi209pgLoGfEjRIHrte/ YHbsPW+T0WNSxx/04RG+SBoMWb8MBtOWwT0p0lfSun2dAa24UEntf7OQ03zS1J8= =xNSX -----END PGP SIGNATURE-----