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-codeigniter-12.1-squeeze-i386-ovf.zip.sig gpg: Signature made Tue Jun 4 20:16:00 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum d5de2c3ef0426e7e1a5a269a7e130550d748723c * md5sum 9a9320114c0c3d27897754da756a9c8e 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 v1.4.10 (GNU/Linux) iQEcBAABAgAGBQJRrkrxAAoJEIXCXpWhbrlNuvwH/0DXSDabix33/MUdrXHqBu/Z CcfiAVw6cGTdWfkJbVCfPFJd+Xbq1OCR+ZXMHSd6ZOXeB/mQ1W83QFeHS1Dia1OI 3I0a0sMQoCCqzumrPOUY4AR2RIUtNX/3x9voE4JTsi6fgbx5umHRu2YClNefw1uv rLpWPPBtz6JahGeFZKqGhPZkp6GTjrf2dya9S3M3g4k0PomENmMPHu/GKdvEjC82 wPxGFFxllJvWI4f4/43r82I1g27uuwZXKDRwPft2m5T/MH6NM85tUfmRQvrjvei5 A6oKYckKe4cz+RoQKYv4algPPIeveG9++K07xQypKhWPoCOFpcKSnbH6UH1EAqs= =kdtH -----END PGP SIGNATURE-----