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-jenkins-12.1-squeeze-i386.iso.sig gpg: Signature made Thu Apr 18 12:56:11 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 16b1f96414b200d8e0e01a268a1cb62493de14f9 * md5sum faea9b995ee24b08fa009308d2153ea8 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) iQEcBAABAgAGBQJRb+1ZAAoJEIXCXpWhbrlNIKMIAJEQgZeyDWEQ6GoCPg0b49C5 xDz+P8zpdWEmMqOf24iX7HTpMTKLaTTyGZk8jGyRjW8K+EDkAHkpCnpZmb7nQIBq Hk3HmaY3paSMUgbXW3wCSjAtPyvpty8ci6+WYptdIBmgy8xxCePVsAn8tte4/kOO TLvX62sfR5OGPLxL9cR6DP5JH7dmRUgtiyjYnyZMAALZvChHUn5Z1DCIp0vSz2Bu Sw2ICGI30P77H8OHrAnBWdursLGXdKjQGLl7lVa1B81PjmBmNbA6CR2o1QZ0Jt7l Fa6muL1t1sNE0WrK5xc2+mtpO59aUFLsAsJNNV7CnFrT5+K7dhoIRx8lbth15zk= =0NTW -----END PGP SIGNATURE-----