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-core-13.0-wheezy-i386-openstack.tar.gz.sig gpg: Signature made Tue Oct 15 14:17:06 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 37d714c7da6150120641704e9c2fb6884eaffc8a * md5sum 8e2ec04f13b91d8a048410a5f54f26be 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) iQEcBAABAgAGBQJSXU5ZAAoJEIXCXpWhbrlNpbgH/i6RuLbDcr3yln++qo+QKnF2 H2qJEaOVcbATJ2qToCeXh2pCfQYP2tayxtE/ERNnUZhAAlc2mUo0H32u9rl/76BN vIU+CXZgjySS6NyXfH4zGAcSew5xeFHUlkz63oON3lgkyDRC6/LSLfJLNNFPdKBP ArJ0Qoa0kjUV+zK3nkBDeTCBK9QiiFzTasnAfa9Fzt92ubl6Sk/JPz7QARCPpBvs k48i3V0rd6J02vs7lGP11N9XH7u/sISIELRF1qLHN1gKyp3HSxy9o8RddA3KUjH9 Tr+pbpY4dSjPlMENWLNfNZb+14MXWkQ+DsphgEZdhJBEHGbVFe94kOEUX2RQu1M= =VGb2 -----END PGP SIGNATURE-----