from the so-when-you-shatter-some-of-the-tubes dept.
schliz writes "Judging by the time it took for Egypt to go offline and back online, the Internet Society speculates that the country's connectivity is controlled by a 'series of phone calls', rather than a 'kill switch'. The Government-imposed internet blackout lasted five days, beginning last Friday, and ending on Wednesday."
egrep patterns are full regular expressions; it uses a fast deterministic
algorithm that sometimes needs exponential space.
-- unix manuals