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<HTML><!--Distributed by F --><HEAD><TITLE>[Chapter 43] 43.3 Printer Control with lpc </TITLE><METANAME="DC.title"CONTENT="UNIX Power Tools"><METANAME="DC.creator"CONTENT="Jerry Peek, Tim O'Reilly & Mike Loukides"><METANAME="DC.publisher"CONTENT="O'Reilly & Associates, Inc."><METANAME="DC.date"CONTENT="1998-10-23T15:51:42Z"><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="ch43_01.htm"TITLE="43. Printing"><LINKREL="prev"HREF="ch43_02.htm"TITLE="43.2 Introduction to Printing on UNIX "><LINKREL="next"HREF="ch43_04.htm"TITLE="43.4 Using Different Printers "></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="ch43_02.htm"TITLE="43.2 Introduction to Printing on UNIX "><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: 43.2 Introduction to Printing on UNIX "BORDER="0"></A></TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="171"><B><FONTFACE="ARIEL,HELVETICA,HELV,SANSERIF"SIZE="-1">Chapter 43<BR>Printing</FONT></B></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch43_04.htm"TITLE="43.4 Using Different Printers "><IMGSRC="gifs/txtnexta.gif"SRC="gifs/txtnexta.gif"ALT="Next: 43.4 Using Different Printers "BORDER="0"></A></TD></TR></TABLE> <HRALIGN="LEFT"WIDTH="515"TITLE="footer"></DIV><DIVCLASS="SECT1"><H2CLASS="sect1"><ACLASS="title"NAME="UPT-ART-2400">43.3 Printer Control with lpc </A></H2><PCLASS="para">The Berkeley <EMCLASS="emphasis">lpc</EM>(8) command is mostly for the superuser.Everyone can use a few of its commands; this article covers those.</P><PCLASS="para">You probably don't have the <EMCLASS="emphasis">/etc</EM> or <EMCLASS="emphasis">/usr/etc</EM> directory in your<SPANCLASS="link">search path (<ACLASS="linkend"HREF="ch08_07.htm"TITLE="Setting Your Search Path ">8.7</A>)</SPAN>,so you'll need to start <EMCLASS="emphasis">lpc</EM> with its absolute pathname.You can type <EMCLASS="emphasis">lpc</EM> commands at the <CODECLASS="literal">lpc></CODE> prompt - then, whenyou're done, type <EMCLASS="emphasis">exit</EM> (or CTRL-d).</P><PCLASS="para"><BLOCKQUOTECLASS="screen"><PRECLASS="screen">% <CODECLASS="userinput"><B>/etc/lpc</B></CODE>lpc> <CODECLASS="userinput"><B>help status</B></CODE>status show status of daemon and queuelpc> ...lpc> <CODECLASS="userinput"><B>exit</B></CODE>%</PRE></BLOCKQUOTE></P><PCLASS="para">Or you can type a single <EMCLASS="emphasis">lpc</EM> command from the shell prompt:</P><PCLASS="para"><BLOCKQUOTECLASS="screen"><PRECLASS="screen">% <CODECLASS="userinput"><B>/etc/lpc status imagen</B></CODE>imagen: queuing is enabled printing is enabled no entries no daemon present%</PRE></BLOCKQUOTE></P><PCLASS="para">The printer<SPANCLASS="link">daemon (<ACLASS="linkend"HREF="ch01_14.htm"TITLE="The Kernel and Daemons ">1.14</A>)</SPAN>watches the queue for jobs that people submit with<SPANCLASS="link"><EMCLASS="emphasis">lpr</EM> (<ACLASS="linkend"HREF="ch43_02.htm"TITLE="Introduction to Printing on UNIX ">43.2</A>)</SPAN>.If queueing is disabled (usually by the system administrator), <EMCLASS="emphasis">lpr</EM>won't accept new jobs.</P><PCLASS="para"><EMCLASS="emphasis">lpc</EM> controls only printers on your local host.<EMCLASS="emphasis">lpc</EM> won't control printers connected to other hosts, though you can checkthe queue of jobs (if any) waiting on your local computer for the remoteprinter.</P><PCLASS="para"><ACLASS="indexterm"NAME="AUTOID-47571"></A><ACLASS="indexterm"NAME="AUTOID-47574"></A><ACLASS="indexterm"NAME="AUTOID-47576"></A><ACLASS="indexterm"NAME="AUTOID-47579"></A><ACLASS="indexterm"NAME="AUTOID-47582"></A><ACLASS="indexterm"NAME="AUTOID-47585"></A>The commands anyone can use are:</P><DLCLASS="variablelist"><DTCLASS="term">restart [<EMCLASS="emphasis">printer</EM> ]</DT><DDCLASS="listitem"><PCLASS="para">This tries to start a new printer daemon.Do this if something makes the daemon die while there are still jobsin the queue (<EMCLASS="emphasis">lpq</EM> or <EMCLASS="emphasis">lpc status</EM> will tell you this).It's worth trying when the system administrator is gone and the printer doesn'tseem to be working.The printer name can be <EMCLASS="emphasis">all</EM> to restart all printers.The printer name doesn't need an extra <EMCLASS="emphasis">P</EM>.For example, to specify the <EMCLASS="emphasis">foobar</EM> printer to <EMCLASS="emphasis">lpr</EM>,you'd type <EMCLASS="emphasis">lpr -Pfoobar</EM>.With <EMCLASS="emphasis">lpc</EM>, use a command like <EMCLASS="emphasis">restart foobar</EM>.<ACLASS="indexterm"NAME="AUTOID-47602"></A></P></DD><DTCLASS="term">status [<EMCLASS="emphasis">printer</EM> ]</DT><DDCLASS="listitem"><PCLASS="para">Shows the status of daemons and queues on the local computer (see the preceding example).The printer name can be <EMCLASS="emphasis">all</EM> to show all printers.<ACLASS="indexterm"NAME="AUTOID-47610"></A><ACLASS="indexterm"NAME="AUTOID-47612"></A></P></DD><DTCLASS="term">help [<EMCLASS="emphasis">command</EM> ]</DT><DDCLASS="listitem"><PCLASS="para">By default, gives a list of <EMCLASS="emphasis">lpc</EM> commands, including ones for thesuperuser only.Give it a command name and it explains that command.<ACLASS="indexterm"NAME="AUTOID-47620"></A><ACLASS="indexterm"NAME="AUTOID-47622"></A></P></DD><DTCLASS="term">exit</DT><DDCLASS="listitem"><PCLASS="para">Quits from <EMCLASS="emphasis">lpc</EM>.</P></DD></DL><DIVCLASS="sect1info"><PCLASS="SECT1INFO">- <SPANCLASS="authorinitials">JP</SPAN></P></DIV></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="ch43_02.htm"TITLE="43.2 Introduction to Printing on UNIX "><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: 43.2 Introduction to 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