NetWizard writes "According to a recent NANOG post and an InfoWorld story, 'Verisign will change the serial number format and "minimum" value in the .com and .net zones' SOA records on or shortly after 9 February 2004'. They seemed to have learned their lesson, from the post: 'There should be no end-user impact resulting from these changes (though it's conceivable that some people have processes that rely on the semantics of the .com/.net serial number.) But because these zones are widely used and closely watched, we want to let the Internet community know about the changes in advance.)'"
egrep patterns are full regular expressions; it uses a fast deterministic
algorithm that sometimes needs exponential space.
-- unix manuals