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-tomatocart-12.0-squeeze-x86-ovf.zip.sig gpg: Signature made Tue Aug 21 12:31:31 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum bf0f865260ed6d3946307ca5d5ec6200fc604c72 * md5sum 5f9acde3574fe69ce2772e113d73d961 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) iQEcBAABAgAGBQJQM3+WAAoJEIXCXpWhbrlNL2UH/iXvB1hnTLK82+HPvy0Cd+Z3 ESuGPm8eIdmxzIuj9Uxkaiy8n5wblXfOovA1zPpvX/MD7tszfN21nvHf32WJeHxa Rk38sy8iYf9ukroVZk0oYN0q4wenfXxzrQ1xv2QuDx3C/Xwn4fVXwfiTYZNwc2uK giBy8SvIA4fOewww6YD0p9pRYmdcZ48Ros5xNiYBvwpN//qqooXBF/FXW/1CbJDs CIh7hb740GEhVGpOuv/DXz+XE61rZwibEpSa3JPo0ZjlCeQzKqHMPntEmI484oMM Vpf8G3mXI/Vqvxm0KCczRbO4pHbF7emDYxQOzFAlI/QfnWBQWKZ8GV1LLFTLIhk= =qnZ1 -----END PGP SIGNATURE-----