cis 191 - lesson 10
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CIS 191 - Lesson 10
Printers
CIS 191 - Lesson 10
CIS 191 - Lesson 10
Two predominate types of printers• Thermal inkjet technology• Laser, drum, toner technology
CIS 191 - Lesson 10
So many ways to hook them up …
Now:• Network• USB• Wireless (Bluetooth, IR)• PictBridge (USB based)
Back then:• Serial cable• Parallel printer cable
CIS 191 - Lesson 10
PrinterConfiguration
CIS 191 - Lesson 10
System V based print subsystem• lp (to print)• lpstat (queue management)• cancel (to remove jobs)
BSD based print subsystem• lpr (to print)• lpq (queue management)• lprm (to remove jobs)
CUPS• Provides both System V and Berkeley based command-line interfaces• Supports new Internet Printing Protocol• Works with Samba
Printing
We will be just looking at CUPS
CIS 191 - Lesson 10
CUPS
The service command will check the status and start
up the service.
CUPS has a web based administration tool which can
be reached on port 631.
CIS 191 - Lesson 10
ServiceConfiguration
CIS 191 - Lesson 10
Sidetrack – Service command
Not: the effects of the service command changes will last until the next shutdown .
They are not permanent.
CIS 191 - Lesson 10
Use the type and file
commands to find
the location and type
of commands
Sidetrack – Service command
The service command is a viewable shell script
(reduced type size here so it will fit)
CIS 191 - Lesson 10
CUPS
CUPS is managed by a web-based configuration utility on port 631
Local access only by default
CIS 191 - Lesson 10
CUPS
To enable remote access click on Administration tab …
CIS 191 - Lesson 10
CUPS
… and scroll down to allow remote administration
CIS 191 - Lesson 10
CUPS
Authenticate yourself as root to confirm change to allow remote administration
CUPS service will restart
CIS 191 - Lesson 10
CUPSBrowse to http://xxx.xxx.xxx.xxx:631/ from another system
You may now manage the CUPS service on Benji remotely from another system.
CIS 191 - Lesson 10
CUPS
Printer: HP LaserJet 1320nConnection: LAN
Next step is to add printers
CIS 191 - Lesson 10
CUPS
IP Address for this 1320n is 192.168.0.12
The LaserJets also have a web-based management utility
CIS 191 - Lesson 10
CUPS
benji192.168.0.25
hp1320n192.168.0.12
This example will show how to add the HP 1320n as a networked printer.
CIS 191 - Lesson 10
CUPS
To add in HP 1320N printer …
… the first step is to click the Add Printer button
CIS 191 - Lesson 10
CUPS
You may get this error if your are browsing in remotely because no certificates have been set up for https protocol.
Not a problem if you are browsing locally
CIS 191 - Lesson 10
CUPS
One way to address the certificate problem is to add an exception.
CIS 191 - Lesson 10
CUPS
This adds the exception
CIS 191 - Lesson 10
CUPS
Add an exception only when you do trust the site. In this case we built and setup the Benji VM so we trust it.
CIS 191 - Lesson 10
CUPS
Click Confirm Security Exception button
CIS 191 - Lesson 10
CUPS
Now we can add the LaserJet
CIS 191 - Lesson 10
CUPS
Fill in basic information
CIS 191 - Lesson 10
CUPS
We will use JetDirect.
JetDirect is a small printer server built into some of HP's printers.
CIS 191 - Lesson 10
CUPS
Hmmm …. lets click on Network Printers link to figure this one out.
CIS 191 - Lesson 10
CUPS
Scroll down to HP printers
CIS 191 - Lesson 10
CUPS
We will use the JetDirect w/o IPP for the HP 1320n
IPP is Internet Printing Protocol for send print jobs over the Internet via the http protocol
HP JetDirect cards use port 9100
A socket is the combination of an IP address and a port number.
CIS 191 - Lesson 10
CUPS
socket://192.168.0.12/9100
This defines how to communicate with the printer
CIS 191 - Lesson 10
CUPS
(you will need to enter root's password)
Service will restart
CIS 191 - Lesson 10
CUPS
Must select printer from long list
CIS 191 - Lesson 10
CUPS
We will choose hp LaserJet 1320 series Postscript (recommended) (en)
CIS 191 - Lesson 10
CUPS
Lets double check the printer supports PostScript … it does
CIS 191 - Lesson 10
CUPS
To finally add the printer it will be necessary authenticate as root
CIS 191 - Lesson 10
CUPS
Printer has been added
CIS 191 - Lesson 10
CUPS
View of newly added printer from Printer tab
CIS 191 - Lesson 10
CUPS
Lets test the printer by printing this CUPS web page to it … and it works.
CIS 191 - Lesson 10
CUPS
Printer: hp photosmart 7550 (color inkjet technology)Connection: USB
Lets add second printer
CIS 191 - Lesson 10
Sidetrack – The previous 7550 "Hot Lips"
6 G's of acceleration8-pen turret
Grit wheel technology from HP Labs
CIS 191 - Lesson 10
CUPS
benji192.168.0.25
hpdv2000192.168.0.27
The second printer is connected by USB to a Windows notebook computer
CIS 191 - Lesson 10
CUPS
First step is the same which is to fill out basic information on printer
CIS 191 - Lesson 10
CUPS
For this connection we will use Samba. Samba implements Windows file and print services sharing on Linux.
Note Windows uses SMB (Server Message Block) protocol to implement these services
CIS 191 - Lesson 10
CUPS
Will need to specify the Windows print share
CIS 191 - Lesson 10
CUPSWill need to specify the Windows print share as //hostname/printsharename
CIS 191 - Lesson 10
CUPS
Username and password Not requiredThis machine is in the same workgroup
smb://server/sharename
This machine is in a different workgroup
smb://workgroup/server/sharename
Username and password requiredThis machine is in the same workgroup smb://username:password@server/sharename
This machine is in a different workgroup
smb://username:password@workgroup/server/sharename
Ways to specify a Windows share
CIS 191 - Lesson 10
CUPS
Select make of printer
CIS 191 - Lesson 10
CUPS
Select model of printer
HP PhotoSmart 7550 Foomatic/hpijs (recommended) (en)
CIS 191 - Lesson 10
CUPS
Printer has been added
CIS 191 - Lesson 10
CUPS
Test new printer by printing its own management page
CIS 191 - Lesson 10
Printingin Linux
CIS 191 - Lesson 10
CUPSlpstat command
The –p option will show the available printers The –d option will identify the default printer
CIS 191 - Lesson 10
CUPSlp and lpr commands
Either command will print myfile to the selected printer
Note that both lp and lpr will read from stdin.
This allows output from another command to be piped in
CIS 191 - Lesson 10
CUPSconvert command
JPEG files need to be converted to postscript before printing with lp or lpr commands
Print job #28
CIS 191 - Lesson 10
ConfiguringCUPS
CIS 191 - Lesson 10
CUPSconfiguration file or command, or GUI
Must restart CUPS after changing configuration file with:service cups restart
Three ways to set the default printer – edit configuration file, command or GUI
[root@benji ~]# cat /etc/cups/printers.conf# Printer configuration file for CUPS v1.2.4# Written by cupsd on 2008-11-16 03:06<DefaultPrinter hp7550>Info hp photosmart 7550Location DenDeviceURI smb://hpdv2000/hp7550State IdleStateTime 1226791825Accepting YesShared YesJobSheets none noneQuotaPeriod 0PageLimit 0KLimit 0OpPolicy defaultErrorPolicy stop-printer
</Printer>
CIS 191 - Lesson 10
CUPSlpoptions command
The –d option will set the default printer. This will override the system default printer set using the web UI
CIS 191 - Lesson 10
ManagingPrintJobs
CIS 191 - Lesson 10
CUPSRejecting Jobs
Clicking the button on the web based utility will reject further jobs
CIS 191 - Lesson 10
CUPSStopping the Printer
Clicking the button on the web based utility will still allow jobs to be spooled
CIS 191 - Lesson 10
CUPSShowing jobs waiting to print
Use lpq or lpstat to show spooled print jobs
CIS 191 - Lesson 10
CUPSRemoving/canceling pending print jobs
Use lpq or lpstat to show the spooled print jobs
Use cancel or lprm to remove print jobs
CIS 191 - Lesson 10
Spool Files
CIS 191 - Lesson 10
CUPSSpool files in /var/spool/cups
Spooled print files are kept in pairs – one control file and one data file – in /var/spool/cups
Print job #27
CIS 191 - Lesson 10
CUPSSpool files in /var/spool/cups
The data file is ascii and the control file is binary when printing a text file
Print job #27
CIS 191 - Lesson 10
Exercise: CUPS
• Enable the CUPS service to run at system startup
• Turn on the CUPS service
• Create a "fake" printer and disable it.
• Practice printing to your fake printer.
CIS 191 - Lesson 10
wrap up
CIS 191 - Lesson 10
Commands:service - Manually control serviceschkconfig - Service startup configurationifconfig - Getting IP address
lp, lpr - Linux print commandcancel, lprm - cancel print joblpq, lpstat - Show print queuelpoptions - Show and change print optionsconvert - convert image file types
Files and Directories:/var/spool/cups - spooled print jobs/etc/cups - CUPS configuration files
Web:http://hostname:631 - CUPS web based management utilityhttp://hostname:9100 - HP JetDirect printer
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