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-asp-net-apache-12.1-squeeze-i386.iso.sig gpg: Signature made Thu Apr 18 13:17:45 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum c8e5145485ca495b57abdc4a43a011b5399b620f * md5sum 0807ce8f378c0422b82e0bd1a522e26c 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) iQEcBAABAgAGBQJRb/JYAAoJEIXCXpWhbrlN3DsH/2OnzMZVslvzbFIzB8cf1x/p xxyZz/ylFrJAi7NAdjp7Jt/Uiv7Cxt4T6OHET56+S0XqkrxHPxS4g/XhB6uXstmz E4s1l3sGPTkCmoASJYHcab3yJwkHFW2SpXGSdFShajqv0HmfN+VY5AsZHNiO633T VBw4Jr75+UAJv5TnwZ51LLiUezXZarJfK3LZKwocmMU6748bPIf64gaZCpIprh8q mJOT0bNDqrifmTL83TTs0roxVlbCbMWBtvwfV1qHmf2hcri4pBthPLvQKe/kWq3j +6vwATaB83lpVD5iMd42cUNXb+h8n61JA4q6tgSYriikXfq7WdXbYuLXpWKuuiQ= =skof -----END PGP SIGNATURE-----