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Top Forums UNIX for Advanced & Expert Users $$number in the shell or shellscript Post 302562894 by cokedude on Saturday 8th of October 2011 08:32:14 PM
Old 10-08-2011
$$number in the shell or shellscript

What does $$number in the shell or shellscript do? Something like this where they use $$3 and $$1.

Managing projects with GNU make - Robert Mecklenburg, Robert William Mecklenburg, Andrew Oram - Google Books
 

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TRACEFILTER(1)							   User Commands						    TRACEFILTER(1)

NAME
tracefilter - apply a bpf filter to a trace SYNOPSIS
tracefilter inputuri bpf outputuri ... DESCRPTION
tracefilter copies all packets that match a bpf expression to an output file. tracefilter is a shellscript wrapper around tracesplit(1) LINKS
More details about tracefilter (and libtrace) can be found at http://www.wand.net.nz/trac/libtrace/wiki/UserDocumentation SEE ALSO
libtrace(3), tracemerge(1), tracesplit(1), tracesplit_dir(1), traceconvert(1), tracereport(1), tracestats(1), tracertstats(1), tracepkt- dump(1), traceanon(1), tracesummary(1), tracereplay(1), tracediff(1), traceends(1), tracetopends(1) AUTHORS
Perry Lorier <perry@cs.waikato.ac.nz> tracefilter (libtrace) October 2005 TRACEFILTER(1)
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