If you want to chomp \r\n, set $/ to \r\n: 

local $/ = "\r\n";

$one = "Hello\r\n";

print "Before chomp: " , length($one) , "\n";
chomp($one);
print "After Chomp:  " , length($one) , "\n";

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In reply to Re^3: chomp() is confusing by ikegami
in thread Why chomp() is not considering carriage-return by jesuashok

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