rjmarvin writes: Apple's era of naming OSs after big cats is over. The Mavericks wave is rolling in, and the first four developer previews have given an inside look http://sdt.bz/64062 at the cutting-edge OS. Users and developers have almost entirely positive things to say about Mavericks, from faster speed and improved stability to new features like iBooks and iCloud keychains. While some installation concerns and errors have arisen, developer preview have improved version by version, and Mavericks is looking good...
egrep patterns are full regular expressions; it uses a fast deterministic
algorithm that sometimes needs exponential space.
-- unix manuals