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-tomcat-12.1-squeeze-i386.iso.sig gpg: Signature made Thu Apr 18 15:34:46 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 5fcf84d713d1ab7a173e479fa613bf05c72f86dd * md5sum 89ad4e0200ff0879cab5889e6b303dd7 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) iQEcBAABAgAGBQJRcBKKAAoJEIXCXpWhbrlNps4IAOAEkvoVPLh/rKLnUQLFanJ1 +P2I50Uwu/YGNBqIp7U9fZGeMNiJeBD0mmw7jxinbI7Mq7nJeyA3OGNdjxIjxrLq ktvugDnoXNyMTeoPL/ReEoMlMsgon1CBELCR0uXt9rFWoYG7CRNhvPso9fFWh0cK 0CGgHCrAROiTytMnwE08b93h0VVrZhPT8MzFGDsAdVvG10X5qVA8Jp5KwYTVKqwU qCVPRdctLGAwF+M21qcATVY1T9rcMHpL0ClJXLA+AJrPuy3S0T+7mvyipVe1hyQY c9vhb9gVM3S7ak2elolT3osTOvclrf/QClPLt2JGXtgWi9Mvoo6lIuQyJvGZlus= =YzkU -----END PGP SIGNATURE-----