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<HTML><!--Distributed by F --><HEAD><TITLE>[Part VI] Managing Processes </TITLE><METANAME="DC.title"CONTENT="UNIX Power Tools"><METANAME="DC.creator"CONTENT="Jerry Peek, Tim O'Reilly &amp; Mike Loukides"><METANAME="DC.publisher"CONTENT="O'Reilly &amp; Associates, Inc."><METANAME="DC.date"CONTENT="1998-08-04T21:48:58Z"><METANAME="DC.type"CONTENT="Text.Monograph"><METANAME="DC.format"CONTENT="text/html"SCHEME="MIME"><METANAME="DC.source"CONTENT="1-56592-260-3"SCHEME="ISBN"><METANAME="DC.language"CONTENT="en-US"><METANAME="generator"CONTENT="Jade 1.1/O'Reilly DocBook 3.0 to HTML 4.0"><LINKREV="made"HREF="mailto:online-books@oreilly.com"TITLE="Online Books Comments"><LINKREL="up"HREF="index.htm"TITLE="UNIX Power Tools"><LINKREL="prev"HREF="ch37_05.htm"TITLE="37.5 And Now, Perl 5 "><LINKREL="next"HREF="ch38_01.htm"TITLE="38. Starting, Stopping, and Killing Processes"></HEAD><BODYBGCOLOR="#FFFFFF"TEXT="#000000"><DIVCLASS="htmlnav"><H1><IMGSRC="gifs/smbanner.gif"ALT="UNIX Power Tools"USEMAP="#srchmap"BORDER="0"></H1><MAPNAME="srchmap"><AREASHAPE="RECT"COORDS="0,0,466,58"HREF="index.htm"ALT="UNIX Power Tools"><AREASHAPE="RECT"COORDS="467,0,514,18"HREF="jobjects/fsearch.htm"ALT="Search this book"></MAP><TABLEWIDTH="515"BORDER="0"CELLSPACING="0"CELLPADDING="0"><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch37_05.htm"TITLE="37.5 And Now, Perl 5 "><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: 37.5 And Now, Perl 5 "BORDER="0"></A></TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="171"><B><FONTFACE="ARIEL,HELVETICA,HELV,SANSERIF"SIZE="-1">Part VI</FONT></B></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="172"><ACLASS="CHAPTER"HREF="ch38_01.htm"TITLE="38. Starting, Stopping, and Killing Processes"><IMGSRC="gifs/txtnexta.gif"SRC="gifs/txtnexta.gif"ALT="Next: 38. Starting, Stopping, and Killing Processes"BORDER="0"></A></TD></TR></TABLE>&nbsp;<HRALIGN="LEFT"WIDTH="515"TITLE="footer"></DIV><DIVCLASS="PART"><H1CLASS="part"><ACLASS="title"NAME="UPT-PART-6">Part VI: Managing Processes </A></H1><DIVCLASS="partintro"><PCLASS="para">In one of his more famous lines, poet William ButlerYeats asked, &quot;How can you tell the dancer from the dance?&quot;</P><PCLASS="para">If it didn't sound so pretentious, you might get away with asking thesame question about programs and processes. A process is the imageof a program as it executes rather than lies there on the disc, aprocess <EMCLASS="emphasis">in potentia</EM>.</P><PCLASS="para">Really, this whole book is about processes; we're not talkingabout program design but about using the darn things. </P><PCLASS="para">Perhaps we're splitting hairs to break off this section. Thechapters it contains could have fit in elsewhere. In the end,though, it seemed right to honor the somewhat tenuous link betweenthe topics of managing processes (<ACLASS="xref"HREF="ch38_01.htm"TITLE="Starting, Stopping, and Killing Processes">Chapter 38, Starting, Stopping, and Killing Processes</A>), program and system performance(<ACLASS="xref"HREF="ch39_01.htm"TITLE="Time and Performance">Chapter 39, Time and Performance</A>), and offline execution (<ACLASS="xref"HREF="ch40_01.htm"TITLE="Delayed Execution">Chapter 40, Delayed Execution</A>).</P></DIV><DIVCLASS="docinfo"><PCLASS="DOCINFO">- <SPANCLASS="authorinitials">TOR</SPAN></P></DIV><PCLASS="part-toc"><ACLASS="chapter"HREF="ch38_01.htm"TITLE="38. Starting, Stopping, and Killing Processes">Chapter 38: <CITECLASS="chapter">Starting, Stopping, and Killing Processes</CITE></A><BR><ACLASS="chapter"HREF="ch39_01.htm"TITLE="39. Time and Performance">Chapter 39: <CITECLASS="chapter">Time and Performance</CITE></A><BR><ACLASS="chapter"HREF="ch40_01.htm"TITLE="40. Delayed Execution">Chapter 40: <CITECLASS="chapter">Delayed Execution</CITE></A><BR></P></DIV><DIVCLASS="htmlnav"><P></P><HRALIGN="LEFT"WIDTH="515"TITLE="footer"><TABLEWIDTH="515"BORDER="0"CELLSPACING="0"CELLPADDING="0"><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch37_05.htm"TITLE="37.5 And Now, Perl 5 "><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: 37.5 And Now, Perl 5 "BORDER="0"></A></TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="171"><ACLASS="book"HREF="index.htm"TITLE="UNIX Power Tools"><IMGSRC="gifs/txthome.gif"SRC="gifs/txthome.gif"ALT="UNIX Power Tools"BORDER="0"></A></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="172"><ACLASS="CHAPTER"HREF="ch38_01.htm"TITLE="38. Starting, Stopping, and Killing Processes"><IMGSRC="gifs/txtnexta.gif"SRC="gifs/txtnexta.gif"ALT="Next: 38. Starting, Stopping, and Killing Processes"BORDER="0"></A></TD></TR><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="172">37.5 And Now, Perl 5 </TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="171"><ACLASS="index"HREF="index/idx_0.htm"TITLE="Book Index"><IMGSRC="gifs/index.gif"SRC="gifs/index.gif"ALT="Book Index"BORDER="0"></A></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="172">38. 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