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-trac_13.0-1_i386.ova.sig gpg: Signature made Tue Oct 15 20:03:31 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 895af00357d6989115861c3e66cb5387a39ea048 * md5sum f8aab9b394fe9156750b09e7612a88cb 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) iQEcBAABAgAGBQJSXZ+NAAoJEIXCXpWhbrlNHn8IAI3se50vDQfcLDWmKeVmLKMY TAlyLQD/FRPtHE5MjuPDQsnt+YSZz/AN89JizZ4/aAAVA6d9Z8A7E0JNi/DVYBtv IPVGaaf1SRiWs12kg5ex+exzltJUJhvbY9bhXyG1iiMFuBR91RZRNYI40qNHuBQC 3kVLw0bfQupPSBoZOk9INAZm5xnMACZAZBFJ8YyIE01G3sB3+tZEYR6u6e+DxbPL +ogw0iQmiQ1wjk/i7YblE01Gpu03c1WOdWjlrFHutb7q8J3gEskQ2D0IeVNkswqU wGLD0tbb8KyN333gUUYvA6b1O7cNJSEa8B9SW5BRSv03L6UZNALnCuQUvQrYUco= =/SS5 -----END PGP SIGNATURE-----