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-mibew-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 08:25:50 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 216eb9d4ef4d05687e96a5e8ce4a3f8465a17a6e * md5sum c046a8d9f67592fe3ffc256fd9d8beae 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) iQEcBAABAgAGBQJSMswHAAoJEIXCXpWhbrlNlhgIAL/m2OeDBm9Hxl7amYgZWDiu /gKejJrxEVveopVhahryw5oGFh5zSsK+cUNIkCTYbQAM7Iua2yY06e75OdrfI9g8 6cUWtLXPD9mavYQYuOqptlj360ed2+muDcPyMtoRwAVLPVHuPHFDRuEgSzBYUBdN arh51iZ8ANfmVjL8MSJwjeN1RvH9mCDpFIFodgUVdywEk8wtrbi/Pd5coqFY2q86 rUptaw/zKz0ZTnghpf+tCcaWg2RnfdIlk7nhij9I2mSyC87KcoHL+xIFWnNElI7C yxoWavi/lYJf1MMt3IJKvvd2W73Y60+gfSktP+mASSHGSSvDDruwsmEBe1qPOv0= =IFGF -----END PGP SIGNATURE-----