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-mysql-13.0-wheezy-i386-vmdk.zip.sig gpg: Signature made Tue Oct 15 17:03:09 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 6452fa8136c1d27b25fee70d9694df7c81321e99 * md5sum 4f9264bb7bffa383d38fce744693ead1 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) iQEcBAABAgAGBQJSXXVFAAoJEIXCXpWhbrlNixQIAKq1Wumq8YSWL/iuhTIXjUbI Z8ebNtdcJngmFmciZxNgcHiSyoKuwjiaaN7H5ebxGd+cw3OIGkHEKXEXcedme75L JQ5p9Vrl8Wb2d/2DPnhe7mAiY1WXQ70T4efpfHKHKE/Fa+xPbT0S+PrkiC39Tafr 9tlF6zQ7/LVZBMnflpOEM9PzRyIaBzvHim6kt9AFTx04IrXk0fFfJQVMmFvSnjyV 7U3a075OVMyB44pdfsmuLE2FPepDQGHkw9BfkCeC8/W3FUfacoFHAb2z1PFHJPxJ y0FQ8tzTJUtSOsH6fvl8CmDsvRFAfr1Z2B66/zyxceKROOT1Aj96TVgX64zi9NQ= =X+iE -----END PGP SIGNATURE-----