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-tomcat-apache-13.0-wheezy-i386-ovf.zip.sig gpg: Signature made Tue Oct 15 19:31:48 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 53c8e33a2c1fabcf6743d79500d158c75b0f5347 * md5sum c649bf3386913b55a64df4be629af04c 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) iQEcBAABAgAGBQJSXZgWAAoJEIXCXpWhbrlN25gH/3p5YeGif1auf37NpUp9G10G 2xxL8CLnplY927upFTY63XojCDsYtwpOb9gFVS2Mv8gSCFSeFaZ0EIaY4NY43LFv KmenPNfpC25ybMSVDEfCnWHud2fKTxjbMJsmtJuAT/m5dgIlyALzEoo7eZKw8dn0 /+ioBPKGmOmK8VrfOo0Qt6+E5H10yr4hVpRHNzTVHLkVi9jf+56GdlPX0PFp2+E3 jmRla9QBgGEVayadiVzWhgsXONXltuV+3O85utLlgSs+7B+urqq8yNzlzNLN4Tsh 0Pv69tFTbKBrQAzLRxLVJJ6FBhYVAaQJmlO5Q3c6YfTzdNKf9UCV0jd1eg3dRd0= =zCNi -----END PGP SIGNATURE-----