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-core-12.0rc2-squeeze-x86-vmdk.zip.sig gpg: Signature made Wed Apr 11 13:53:06 IDT 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 65b59e653b475521debabadb4af7570fba446781 * md5sum 8b4cb05fc1a9b459294d851561e5e7a1 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) iQEcBAABAgAGBQJPhWKPAAoJEIXCXpWhbrlN2NoH/28pVlaEMeeGwh3tB9lB1ixC NJdsOdKbyLXc/8yVvmqxiSAIJhCaosWcYLVmuUYZST4mZ5GcTIEbUELZtqwIurY6 I+SK01DtaJsV0jUJePbYnIlWvRDyU1BW2Z2rWREUxvjZww2G+xcEAq/IQZrNiQR2 4V0qpXtqUMS3OPIg7JRcUL/S9vHPOnsHCUTy2M8nwTUn60+/8KmvPiIHTX1zcP1r jyO9hfLnrmYl6Czl+g4jdiHms/DYmvECvzDJ/Rlu9ubF/+3tfNuljk6UnBoy5wUl DrIcs+ugtGaLUvwxQTCQgPbd5SR3n95ePqsgcn3qF8AZtg6BDiXNGtleYjgZrfM= =kQ80 -----END PGP SIGNATURE-----