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-orangehrm-13.0-wheezy-amd64.iso.sig gpg: Signature made Tue Oct 15 16:03:51 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum d1ae3d1ad28a9471207af4b64617103daa0d87e5 * md5sum ae2f9aeed6eb791aed14a51fad7c9dbb 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) iQEcBAABAgAGBQJSXWdeAAoJEIXCXpWhbrlN7SQH/RJ5IQnlNT4zXVcUO43D8P3d 9Rerilxw+iZ/8Vn9meBnLNanlwc8n4teRXF96tEtIVMJ5i5GR7xLf4wXN89kTV2Z qqMHZutDXm+xVkM+a5X7r2xqXkVhogBFcbys1wzlKYu2q22a/tGOB0gQ54J20rwS pC3wkl1MCYx9RnKuOHPH/rhSEno7CY8r4P6xy4/OP5YvJIAr8CjXkuh7diTHoB0q xr5pzdzXbQagXNwtfUNWv2ZpdbJLqwYs4XjAglXd+S4VM96GXS47WFLzE7+W6yW3 gas9W4+KphWa21aostu4v/KPxgEV3r1pzI325k3D6NJ7dxBjI6N014bRoBxp55w= =Fg+A -----END PGP SIGNATURE-----