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-limesurvey-13.0-wheezy-amd64.iso.sig gpg: Signature made Tue Oct 15 15:31:07 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 4368ca31c394cc16fd581c6acefb1ac15b135279 * md5sum 083bbce9ae17cfd63e89686a2409c69d 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) iQEcBAABAgAGBQJSXV+xAAoJEIXCXpWhbrlNOw0IAKZOuCOFMqYgSvYanAr3zqMI cx/YpF0YJeVwDnNFaykWa6mY31uUhfn5KJabEMYomFSL58GIdShAgCmahm+V0KIa 5+1npsNA8AlbL80TuxkMmbt7vvfIu2YiVp1rMeA4XQ/XTclF/Z91mSn5Jn5bYBGq rYp4bqdm/8h1pxueUubs8GsSitlUD3PvaDw7SPPxWJ6ALZK2BaGm2v/HQp1Msz6K SqdCusPDhWWbwF3IJ7bxzK9e+kyIVzNDbK75u516pM8Fg04Tr4F1V4/z2sY/SIj/ gzZgncJpdF+pjW5GvyAbrj8LAeXb4v3YV3TukgWRmo5c2pDBSqzjbNhjmyg0Pf4= =HBOl -----END PGP SIGNATURE-----