In computing, a blacklist or block list is a basic access control mechanism that allows through all elements (email addresses, users, URLs, etc. ), except those explicitly mentioned. Those items on the list are denied access. The opposite is a whitelist, which means only items on the list are let through whatever gate is being used. A greylist contains items that are temporarily blocked (or temporarily allowed) until an additional step is performed.
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Linus Torvalds, the principal engineer of the Linux kernel, has approved new terminology for its code and documentation to ...