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-concrete5-12.0-squeeze-x86-xen.tar.bz2.sig gpg: Signature made Tue Aug 21 15:23:45 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 33ae5e157ec00b694edad23b0a5cdd310b5cf311 * md5sum 5c040515083ee2b0cf65e036abc5d0d3 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) iQEcBAABAgAGBQJQM6f4AAoJEIXCXpWhbrlNcLgH/2UTv+sBuh/uMLXRN2goVSPS mNAUJdZp0wQQBidBkVCszmltvw9DEXeH257SpIxBhzHBjBPjNgwNRuLNOQ4BC+UJ mnOsI9F7TAHKZwlvbrhTINEgvuFiFitIcKpGYt4gVM+jomjuo216LvtMTV1WQrf/ 3IT9VJscoYQmAsrySOPC7KZOzYkDsULpFivDv7KxXtPEbfh//tJJsgNkWV4TR6QA sTmpMTDY8VkXus8/oRiptV1riuqdkMUC28iN3P6bCLJO+wOa3RlsRF/nH/ldTYBf QMtrUl+iPvXoyzKlylF1D2r2cbijY+dy4vSMd08Pmb44JOx/eGfSVkvTNsFoYZs= =4NDh -----END PGP SIGNATURE-----