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>Instances and Logging</A
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><P
>  Since version 2.4, IPTraf allows multiple instances of the
  facilities at the same time in different processes (for example, you can
  now run two or more IP Traffic Monitors at the same time).
  However only one can listen on a specific interface or all interfaces
  at once. The only exception is the general interface
  statistics, which is still restricted to only one instance at a time.</P
><P
>  Because of this relaxation, each instance now generates log files with
  unique names for instances, depending on either their instance
  or the interface they're listening on. If the <I
CLASS="EMPHASIS"
>Logging</I
> option is turned
  on (see the <A
HREF="config.html"
>Configuration</A
> chapter), IPTraf
  will prompt you for a log file name while presenting a
  default. You may accept this default or change it. Press Enter
  to accept, or Ctrl+X to cancel. Canceling will turn logging off for that
  particular session.</P
><P
>  If you don't specify an absolute path, the log file will be placed
  in <TT
CLASS="FILENAME"
>/var/log/iptraf</TT
>.</P
><DIV
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><IMG
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>Figure 1. The logfile prompt dialog</B
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><P
>  See the Logging section
in the <A
HREF="config.html"
>Configuration</A
> chapter for
detailed information on logging. See also the documentation on
each statistical facility for the default log file names.</P
><P
>  The default log file names will also be used
if the <TT
CLASS="COMPUTEROUTPUT"
>-B</TT
> parameter is used
  to run IPTraf in the background. You can override the defaults with the
  <TT
CLASS="COMPUTEROUTPUT"
>-L</TT
> parameter. See
<A
HREF="backop.html"
>Background Operation</A
> in Chapter 9.</P
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