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-mongodb-13.0-wheezy-i386-vmdk.zip.sig gpg: Signature made Tue Oct 15 17:01:55 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 3268d934e3333411b5059884092e0006d075c2df * md5sum 248d7e51c84415c2adaf88fcfb62da85 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) iQEcBAABAgAGBQJSXXT4AAoJEIXCXpWhbrlNUp4H/A/JY0Ugz0RopytOIAKOW9dX bahvwbF1PJnSrV2ZnkT6MP3Z9KX364FTQx9yCmqFDJMw7Xzuc+D9YdWpEjSFoy7W x790O4zAzszZUkIFgd5Kjg4uTjcAiXs22jTth1LozeZKvqYxIGcC/3gbuitJa7eQ ZPZStQ8r4CVNc7f/HEgZzXS3uMaYTM57JSKv6D45piXUNYH2mx21Jm/9yr7xsNDE Lnyp6C+BrjzR6miRIXqRk5TaLsny92onkmLISJ/pwS1uXvXXoKnNXHffurlyPssN 0qkYJi2ots5kfG+FOQjl2azxaxcf2kF/+cCi7M8ydqv6kMvcgiQfHfr3trPwzaA= =4AaH -----END PGP SIGNATURE-----