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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >Background Operation</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="IPTraf-ng User's Manual" HREF="index.html"><LINK REL="PREVIOUS" TITLE="Custom Information" HREF="x1915.html"><LINK REL="NEXT" TITLE="Messages" HREF="a1980.html"></HEAD ><BODY CLASS="CHAPTER" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >IPTraf-ng User's Manual</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="x1915.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="a1980.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="CHAPTER" ><H1 ><A NAME="BACKOP" ></A >Chapter 9. Background Operation</H1 ><P > IPTraf-ng's facilities can be placed in the background solely for logging. When running in the background, it doesn't display any output on the screen, and doesn't receive input from the keyboard, and drops you back to the shell.</P ><P > Before starting a statistical facility in the background, configure IPTraf-ng in the usual way (set filters, add TCP/UDP ports, etc).</P ><P > Once that's done, exit all instances of IPTraf-ng on the system, then invoke IPTraf-ng from the command line with the parameter to start the facility you want, the timeout (<SAMP CLASS="COMPUTEROUTPUT" >-t</SAMP >) parameter if you wish, and the <SAMP CLASS="COMPUTEROUTPUT" >-B</SAMP > parameter to actually daemonize the program. For example, to run the IP traffic monitor in the background for all interfaces, issue the command</P ><PRE CLASS="SYNOPSIS" >iptraf-ng -i all -B</PRE ><P > To run the detailed interface statistics on interface <TT CLASS="FILENAME" >eth0</TT > for 5 minutes in the background:</P ><PRE CLASS="SYNOPSIS" >iptraf-ng -d eth0 -t 5 -B</PRE ><P > If the timeout parameter is not specified, the facility will run until the process receives a USR2 signal. To stop a facility in the background, do a</P ><PRE CLASS="SYNOPSIS" >ps x</PRE ><P > at the command line, and find the process id (pid) of the iptraf-ng process you're looking for. Then send that process a USR2 signal with the kill command:</P ><PRE CLASS="SYNOPSIS" >kill -USR2 pid</PRE ><P > Since IPTraf-ng cannot send error messages to the terminal, all messages are written to the file daemon.log in the IPTraf-ng logging directory.</P ><P > The <SAMP CLASS="COMPUTEROUTPUT" >-B</SAMP > parameter automatically enables logging regardless of its configured setting. The parameter is ignored if not used with one of the parameters to start a facility from the command line.</P ><P > The log file can be specified with the <SAMP CLASS="COMPUTEROUTPUT" >-L</SAMP > command-line parameter. If this parameter is not specified, the default log file name for the facility will be used (see the descriptions of the facilities above for the default log name patterns). If you don't specify an path, the log file will be placed in <TT CLASS="FILENAME" >/var/log/iptraf-ng</TT >.</P ><P > The logging interval for all facilities (except the IP traffic monitor) can also be overriden with the <SAMP CLASS="COMPUTEROUTPUT" >-I</SAMP > command-line parameter.</P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="x1915.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="a1980.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Custom Information</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" > </TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Messages</TD ></TR ></TABLE ></DIV ></BODY ></HTML >

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