CUPS = Common Unix Printing Subsystem

Use redhat-config-printer to administer.

When I added the HP 8100 Black & White printer to vinu, here are the changed files,

-rw-r--r--   root  root       145 Jul  6 16:00 /etc/printcap
-r--r-----   root  sys         32 Jul  6 16:02 /etc/cups/certs/0
-rw-r--r--   root  root     82228 Jul  6 16:00 /etc/cups/ppd/HP8100BW.ppd
-rw-------   lp    sys      20389 Jul  6 16:00 /etc/cups/cupsd.conf
-rw-------   lp    sys       2971 Jul  6 16:00 /etc/cups/printers.conf
-rw-r--r--   root  root       103 Jul  6 16:00 /etc/cups/lpoptions
-rw-------   root  root       578 Jul  6 16:00 /etc/alchemist/namespace/printconf/local.adl

-------------------------------------------------------------------------------------------

/etc/printcap contained
# This file was automatically generated by cupsd(8) from the
# /etc/cups/printers.conf file.  All changes to this file
# will be lost.
HP8100BW:

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/etc/cups/ppd/HP8100BW.ppd is a 1,841-line file, starting with
*PPD-Adobe: "4.3"
*%
*% For information on using this, and to obtain the required backend
*% script, consult http://www.linuxprinting.org/ppd-doc.html
*%
*% PPD-O-MATIC generated this PPD file. It is for use with all programs 
*% and environments which use PPD files for dealing with printer capabilty
*% information. The printer must be configured with a Foomatic backend
*% filter script. This file and the backend filter script work together to
*% support PPD-controlled printer driver option access with arbitrary free 
*% software printer drivers and printing spoolers.
*%
*% You may save this file as 'HP-LaserJet_8100-Postscript.ppd'
*%
*%
*FormatVersion: "4.3"
*FileVersion:   "1.1"
*LanguageVersion: English 
*LanguageEncoding: ISOLatin1
*PCFileName:    "POSTSCRI.PPD"
*Manufacturer:  "HP"
*Product:       "LaserJet 8100"
*cupsVersion:   1.0
*cupsManualCopies: True
*cupsModelNumber:  2
*cupsFilter:    "application/vnd.cups-postscript 0 cupsomatic"
*ModelName:     "HP LaserJet 8100, Foomatic + Postscript"
*NickName:      "HP LaserJet 8100, Foomatic + Postscript"
*ShortNickName: "HP LaserJet 8100"
*PSVersion:     "(3010.000) 550"
*PSVersion:     "(3010.000) 651"
*PSVersion:     "(3010.000) 652"

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/etc/cups/cupsd.conf: 784-line file that's mostly all comments or whitespace.  The 26 
                      non-comments lines basically were an http config file,
LogLevel info
MaxLogSize 0
Printcap /etc/printcap
<Location /admin>
AuthType Basic
AuthClass System
Order Deny,Allow
Deny From All
Allow From 127.0.0.1
</Location>
<Location /printers/HP8100BW>
Order Deny,Allow
Deny From All
Allow From 127.0.0.1
AuthType None
</Location>
<Location />
Order Deny,Allow
Deny From All
Allow From 127.0.0.1
</Location>
Browsing On
BrowseProtocols cups
BrowseOrder Deny,Allow
BrowseAllow from @LOCAL
Listen 127.0.0.1:631

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/etc/cups/printers.conf:  107-line XML file with the following 11 non-comment lines,

<DefaultPrinter HP8100BW>
Info Created by redhat-config-printer 0.6.x
DeviceURI lpd://quetzal/quetzal
Location HP LaserJet 8100 Series PS
State Idle
Accepting Yes
JobSheets none none
QuotaPeriod 0
PageLimit 0
KLimit 0
</Printer>

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/etc/cups/lpoptions: 1-line file containing

Dest HP8100BW page-bottom=36 cpi=12 lpi=7 scaling=100 page-right=36 page-left=36 wrap=true page-top=36

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/etc/alchemist/namespace/printconf/local.adl: gzip'd, 47-line XML file.