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-processmaker-13.0-wheezy-amd64-vmdk.zip.sig gpg: Signature made Wed Oct 16 09:52:05 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 755afdd818b3c581c8f5e4644704df9acfd40399 * md5sum 330ef4cd1b8307ec1017a71531391987 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) iQEcBAABAgAGBQJSXmG6AAoJEIXCXpWhbrlNPIYH/37VTC68Ppwe4g32vGCEqvKz DesZMaoDWnSrrHrI9gRnpX7I5R3ksMhXzLY0SYxLiMZmoYKOiphnG4usyfLPfJ7w YWnJ2NbBxdOTuONeRDojbQPoU7EboYPVSLRMjh69HfrJEBb7GvZmjhiPhBSg2NRx O0PavJ+Z8ic4joFFWRFMzrRRsk6j6xptdRLARgQLRBwLZDUwHstzBD3fI5xZ/0eV qhksWyBNv4RtswUWMezLs6hsoy4miOOCyLbaYXbi5f+gRiVBO1xTynZlwaOjs19u uwbCTVAH97XGP4z6wDcX0P3R37xrATSpacfWd4eHvssxHKZwN6r7Mnoqfet6TXQ= =u+Bx -----END PGP SIGNATURE-----