<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <HTML><HEAD><TITLE>Man page of QSGREP</TITLE> <META name='KeyWords' content='Quality of Service, QoS, Apache Web Server, Web application security, WAF, Open Source Software, Security, Proxy'/> <META name='author' content='Pascal Buchbinder' /> </HEAD><BODY> <H1>QSGREP</H1> Section: qsgrep man page (1)<BR>Updated: May 2023<BR><A HREF="#index">Index</A> <A HREF="index.html#utilities">Return to Main Contents</A><HR> <P> <A NAME="lbAB"> </A> <H2>NAME</H2> qsgrep - prints matching patterns within a file. <A NAME="lbAC"> </A> <H2>SYNOPSIS</H2> qsgrep -e <pattern> -o <sub string> [<path>] <A NAME="lbAD"> </A> <H2>DESCRIPTION</H2> qsgrep is a simple tool to search patterns within files. It uses regular expressions to find patterns and prints the submatches within a pre-defined format string. <A NAME="lbAE"> </A> <H2>OPTIONS</H2> <DL COMPACT> <DT>-e <pattern> <DD> Specifies the search pattern. <DT>-o <string> <DD> Defines the output string where $0-$9 are substituted by the submatches of the regular expression. <DT><path> <DD> Defines the input file to process. qsgrep reads from from standard input if this parameter is omitted. <P> </DL> <A NAME="lbAF"> </A> <H2>EXAMPLE</H2> Shows the IP addresses of clients causing mod_qos(031) messages): <P> <BR> qsgrep -e 'mod_qos\(031\).*, c=([a-zA-Z0-9:.]*)' -o 'ip=$1' error_log <P> <A NAME="lbAG"> </A> <H2>SEE ALSO</H2> <A HREF="qsdt.1.html">qsdt</A>(1), <A HREF="qsexec.1.html">qsexec</A>(1), <A HREF="qsfilter2.1.html">qsfilter2</A>(1), <A HREF="qsgeo.1.html">qsgeo</A>(1), <A HREF="qshead.1.html">qshead</A>(1), <A HREF="qslog.1.html">qslog</A>(1), <A HREF="qslogger.1.html">qslogger</A>(1), <A HREF="qspng.1.html">qspng</A>(1), <A HREF="qsre.1.html">qsre</A>(1), <A HREF="qsrespeed.1.html">qsrespeed</A>(1), <A HREF="qsrotate.1.html">qsrotate</A>(1), <A HREF="qssign.1.html">qssign</A>(1), <A HREF="qstail.1.html">qstail</A>(1) <A NAME="lbAH"> </A> <H2>AUTHOR</H2> Pascal Buchbinder, <A HREF="http://mod-qos.sourceforge.net/">http://mod-qos.sourceforge.net/</A> <P> <HR> <A NAME="index"> </A><H2>Index</H2> <DL> <DT><A HREF="#lbAB">NAME</A><DD> <DT><A HREF="#lbAC">SYNOPSIS</A><DD> <DT><A HREF="#lbAD">DESCRIPTION</A><DD> <DT><A HREF="#lbAE">OPTIONS</A><DD> <DT><A HREF="#lbAF">EXAMPLE</A><DD> <DT><A HREF="#lbAG">SEE ALSO</A><DD> <DT><A HREF="#lbAH">AUTHOR</A><DD> </DL> <HR> </BODY> </HTML>