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<th colspan="3" align="center">LPRng-HOWTO: 1 Apr 2002
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<h1 class="SECT1"><a name="SECOH">12.16. Single Printcap File
for Large Installation</a></h1>
<p>One of the major problems faced by administrators of large
sites is how to distribute printcap information. They would
like to have a single printcap file either distributed by a
file server (NFS) or by some other method such as <tt class=
"LITERAL">rdist</tt>. By using the <tt class=
"LITERAL">server</tt> and <tt class="LITERAL">oh</tt> tags,
information for the specific sites can be separated out. For
example:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN6045"></a>
<pre class="SCREEN">
# printcap
pr1:lp=pr1@serverhost1:oh=*.eng.site.com,130.191.12.0/24
pr2:lp=pr1@serverhost1:oh=*.eng.site.com,130.191.12.0/24
pr1:lp=pr2@serverhost2:oh=*.admin.site.com
pr2:lp=pr2@serverhost2:oh=*.admin.site.com
pr1:server:oh=serverhost1.eng.com:lp=/dev/lp:tc=.common
pr2:server:oh=serverhost2.admin.com:lp=/dev/lp:tc=.common
.common:sd=/usr/local/lpd/%P
</pre>
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<p>The above example has some interesting effects. The <tt
class="LITERAL">pattern</tt> is used as a <i class=
"EMPHASIS">glob</i> pattern and is applied to the fully
qualified domain name (FQDN) of the host reading the printcap
file. For example, <tt class="FILENAME">*.eng.site.com</tt>
would match host <tt class="FILENAME">h1.eng.site.com</tt>
but would not match <tt class=
"FILENAME">h1.admin.site.com</tt>. Thus, the effects of the
first couple of entries would be to specify that the <tt
class="LITERAL">pr1</tt> and <tt class="LITERAL">pr2</tt>
printers on the <tt class="LITERAL">eng</tt> hosts would be
<tt class="LITERAL">pr1@serverhost1</tt>, and on the <tt
class="LITERAL">admin</tt> hosts would be <tt class=
"LITERAL">pr2@serverhost2</tt>,</p>
<p>Also, the lpd daemons on <tt class=
"LITERAL">serverhost1</tt> and <tt class=
"LITERAL">serverhost2</tt> would extract the additional
information for <tt class="LITERAL">pr1</tt> and <tt class=
"LITERAL">pr2</tt> respectively, overriding the common <tt
class="LITERAL">lp</tt> entries.</p>
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