This is TeX, C Version 3.14t3 (format=plain 93.5.22)  4 NOV 1994 12:26
**network-tools.tex
(network-tools.tex
! Undefined control sequence.
l.4 \chapter
            {Useful Free Stuff}
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! Undefined control sequence.
l.5 \label
          {app:free}
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! Emergency stop.
l.5 \label
          {app:free}
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