coolnumbr12 writes: Chinese hackers have infiltrated a sensitive U.S. Army database that contains information about the vulnerabilities of thousands of dams located throughout the United States. TheU.S. Army Corps of Engineers’ National Inventory of Dams (NID) has raised concerns that information gathered in the hack attack could help China carry out a cyberattack on the national electrical power grid.
egrep patterns are full regular expressions; it uses a fast deterministic
algorithm that sometimes needs exponential space.
-- unix manuals