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-nodejs-12.0-squeeze-x86-ovf.zip.sig gpg: Signature made Tue Aug 21 12:02:08 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum cab954ea938c142f5036d33251c7bbe60cd7d445 * md5sum 65fdeb0dceec6632fa0d36a5de58c277 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) iQEcBAABAgAGBQJQM3i0AAoJEIXCXpWhbrlNlhYH/2bDymaHUoeNqcjmnNdhnxKd hNIBh+tQAtpCMDV82LCSsE+vsdRm94gsxJidHuFP+K9GZbqtxLWTr3OGGakalDmr SApK6VHBLStNYRCkIollFORmAvyiWYt+npb0cn/87Vu9GnIGgi/JPGEhvB5hwkZX lzdqxtie6cATZZqw0Wl3gaVZjp7OveTXmdHL/OdDIxn25p9pqUL71o3Zdkb2rtsp vzSXbYFRfAunI+dSWdvsHXebMNHRNxWh86o6y6NxG0TOBqyz/MPiUjN1Lro9I/pS DcMz5Le7ukcdfYPRPFzTffwt64HtHK/dccdK23H5pnvKILLKwNF19aiN170M2zE= =0/M4 -----END PGP SIGNATURE-----