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  $ ps aux | grep tee
  username   12345 0.1  0.0   5416   740 pts/0    S+   13:56   0:02 tee output.txt
  $ gdb -p 12345
  (gdb) p dup2(open("/dev/null", 0), 1)
  (gdb) p dup2(open("/dev/null", 0), 2)
  (gdb) detach
  (gdb) quit

The terminal with the 'tee' is now silent, but the
output file continues to grow.

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