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 debian-7-turnkey-concrete5_13.0-1_i386.tar.gz.sig gpg: Signature made Tue Oct 15 15:28:15 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum f607160c9e40ff1bbea7ba6801292415d70b1365 * md5sum 2a3f6cb5a4248b35a84f2746ca2e11fd 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) iQEcBAABAgAGBQJSXV8HAAoJEIXCXpWhbrlNuhsIAIhMCSEkx1NVecujxAxXVlqw VrRew2OtPxXJEZ3LBVQNHZvTxK88Y+GWcGHzuX3Pp775+LJvHxJ2wqcRC1SQr3Aj f/n2PWMWIJrOJoOyqCOmnYJDVnGkl94bpF8e/2MSP0P3eBhyKs7KJcJzj86b+wrs Q1qWt06BPksfbuGo5B/5XPkRZUv2CMpuZ9i2JILbm4GHgkzWaSAHrlYYdJZ43bXo Z5jsNX9xLIax1PrpQxwitKvTXPuB0p43qFTTKgr1+LhChbHkiCVnqBDMSQOLZfDX 9+ZPF9v9ZVtyDMv2BjQP/H8L/UihcL6CZA/JJlUo+spI1uKgJSLXJs9FlSGWKMQ= =NCXU -----END PGP SIGNATURE-----