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-cakephp-13.0-wheezy-amd64-vmdk.zip.sig gpg: Signature made Wed Oct 16 08:11:50 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum a5a18247b55399839648bbe0d6eb173176f1ab87 * md5sum 5032919dd72cf73bf7e231a515b00998 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) iQEcBAABAgAGBQJSXko8AAoJEIXCXpWhbrlNmskIAIhkpZwYfgIlcgoBt+nW3bxR ZTG3xZ3c9aV6gEknGTvSs1k1vkp3brLIQcKuFUQQi1N1oMrXD23w0zcYybBlxv2W DduutT7URYC1FmTqFDaGe9gGXyG0pWkC+BJZiM2I0Ejlfk2RMcdfGTd6UbHCCS5z aeudeLxdR6ZWTMkXTZZbS1NZSPl5pVryfcR+VrFDQnttbbx0pdVYR+LQBExGmIEQ /I2KzLOSEfWTl32bqIDQzABHmR6pRR1+5LzDxFnbPgSdLAvFMx4G+S2pedXUBPG7 PZHDBWMfN8O0b7eO/h+SOkebdE3iEk3qeHPS0jLOYNGESc7nG/1FUs5w6Z379+I= =UtuX -----END PGP SIGNATURE-----