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-i386-ovf.zip.sig gpg: Signature made Tue Oct 15 14:51:25 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 1de0ceaa23acf64bf1743c6c6ee4ba2cc894652e * md5sum 90ca37e6f18eea6824bc3644974c35d9 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) iQEcBAABAgAGBQJSXVZiAAoJEIXCXpWhbrlNPE8H/j8Yb2FAjl2gPUKRtr8OJomL p7LMNJuk5rN7FBbwCsYDzSTupoutaqpPAVCqRsCWQmHYME55JXWpxrY69szVDg1C XGlf1OeX2W7JsolFZLseAiJDbmkFJSN/jjMkHufnNi+yLusupIBd7JUDcvxJs9K6 ND7OFDg7QnJvs0PYOJ6JMivrUW/pcOmrDgmRV81S5lZ09ySXfTbthT5I2y902aXQ S4tMfbnLyKtep1F6slmoiDRwTT+tF80R0xa9sXI6KfMP1qSorJOCUrWVTCqHPZUz TiEMf7/tpPHHAPzDF+ZZn4SRIVjrrrhg0nmT41MTOIoGu62CgPEfnv7TiAuZGvk= =fWb7 -----END PGP SIGNATURE-----