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use strict; my $cmd="netstat >>C:\\perl-program\\test2\\netstat_ouput.txt"; ... TCP WXP-DPBG8BS:1448 localhost:1447 ESTABLISHED TCP WXP-DPBG8BS:5354 localhost:1054 ESTABLISHED TCP WXP-DPBG8BS:27015 localhost:1440 ESTABLISHED
port found:3743 ... port found:3746 ..............