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-otrs-12.1-squeeze-i386-ovf.zip.sig gpg: Signature made Tue Jun 4 22:52:21 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 2e7bf6b05af33ba4fc92789cd6114278f1921308 * md5sum 855eb968db42e4eda96b549c91136b59 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) iQEcBAABAgAGBQJRrm+YAAoJEIXCXpWhbrlNmo4H/2wNGNcwideeE29m3pGUPHuy nM3iOQyJsSWJjjN4MBO24IxwZFaEujoFJHON65PCB+Dqjj/5hBKfgYafiFmqAsyW VOIGEspMgVOLWVxnXbMXre9l9p9WaUAmXSGYsMiuNPCrJlrCXjS6B1UyNyNVcil8 Xj823LfrcNpW95WkhwKk+csDdzoNRA2+DwoRDKskWKVAGgpFQpmST3LT7Avr1SZE U8KyjySLDFXTF5CchnWUOg4NnTfBRKbSd/nTYgbF38Y3FYGewdPXRokM9sh5DJ3Y OCsRyfa99apoux+cHJ5exOs6WcxC56PC7g6xxkOPpG+cytifyAQd36dbglPE2NM= =e3sW -----END PGP SIGNATURE-----