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-12.1-squeeze-amd64.iso.sig gpg: Signature made Wed May 1 13:06:03 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 68812c5d551f3d8a06fdf027d5530cc5d90c79fc * md5sum 1a161a06773a55c15216cdfb99ce571b 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) iQEcBAABAgAGBQJRgRM0AAoJEIXCXpWhbrlNMEAIAIlUr8COG2ZP8mn/jj2IOTT4 VYSXMHc2feuWWcenaQfD/bMQ7M8W4lxgcLz1z1E4det/27OPRQpZhyCcARtQ6JSj u/VXc079cI7EXuQ1bf+HKWX4nX/EbAz2nt9kx6E8kfJ+qiCVByIqaDAXxYDnErfI MtOO0hKK0dPEYW2vokHE9s/4d2r/Qo9/oebFvQALZLmsTAuGWoTG/2EImNU9QxxO JCYHAkD73Q/Ow95TnHhzNkf3xJ3+bG4n6bsnH7C1DBm889GfjarL99s7KEAK0JCS Q6kvqCaFMTFxpKkthZSVxPHVHYbq/eOLTXQO94pGpWbd6OgJPl8WYYDLRimrYPM= =OSJN -----END PGP SIGNATURE-----