XOR or ⊕ - a type of logical disjunction on two operands that results in a value of true if the operands, or disjuncts, have opposite truth values. A simple way to state this is "one or the other but not both."
Saturday, September 13, 2014
How to disable "who" and "users" and "last" command
On a VPS where you have multiple users you might not want that everybody can lurk and see who else is online.
Simple Solution: chmod 0700 /usr/bin/who and /usr/bin/w and /usr/bin/users and /usr/bin/last
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