Goffee71 writes: "The last post has blown for PostRank, with the company confirming the "sunsetting" of its popular social media analytics service, which Google brought last June, with users being advised to switch to Google Analytics instead. "I am going to be sick," was one comment at the time of the buyout — sickbags being passed around now." Link to Original Source
egrep patterns are full regular expressions; it uses a fast deterministic
algorithm that sometimes needs exponential space.
-- unix manuals