awk's NR maps to Perl's $., so you should get your expected result with something like perl -ne 'print "$.:\t$_" if /GRHL3/' <filename>.

My experience has been that the best general reference when you are trying to track down 'magic' behavior is usually perlvar.

In reply to Re: print if // line number? by kennethk
in thread print if // line number? by ZWcarp

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