My man pages tell me that egrep is the same as grep -E (--extended-regexp). There's also grep -P (--perl-regexp) which is even friendlier to Perl/Python/Ruby us

My man pages tell me that egrep is the same as grep -E (--extended-regexp). There's also grep -P (--perl-regexp) which is even friendlier to Perl/Python/Ruby users, in that the parens and braces work the same way.