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(wget.info)Signals

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Signals
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   Since the purpose of Wget is background work, it catches the hangup
signal (`SIGHUP') and ignores it.  If the output was on standard
output, it will be redirected to a file named `wget-log'.  Otherwise,
`SIGHUP' is ignored.  This is convenient when you wish to redirect the
output of Wget after having started it.

     $ wget http://www.ifi.uio.no/~larsi/gnus.tar.gz &
     $ kill -HUP %%     # Redirect the output to wget-log

   Other than that, Wget will not try to interfere with signals in any
way.  `C-c', `kill -TERM' and `kill -KILL' should kill it alike.