Dtyjlui

I have installed a network printer in my Ubuntu 14.04 machine by using system-config-printer. This GUI program offers a "Find network printer" function, that explores the local network. It returns a list of printers names, associated with IP adresses.

So let's say I choose one and successfully install it.

Now after a while I realize the one I installed is the wrong printer. So I do the process again, and... oh wait, there are several printers of same type (and name), with different IP adresses!

Ok, no problem, lets just check the IP of the one I just installed, so I make sure I don't install the wrong one again. So the question is: how to I get the IP of an installed printer ?

Apparently, the "properties" dialog (sample below) does not give access to this information (no, its not hidden in the URI line).

No success either by using the CUPS webserver through http://localhost:631, it seems to be basically another way of getting the same information.

Edit: the question isn't related to the printer below but is more general: as the OS is able to fetch the printer's IP at the network exploring step, I assume that information is stored somewhere. Where is it stored and how do I access it ? Or maybe it isn't stored anywhere ?

According to the HP Laserjet 2400-series User Guide, the IP address is available on the control panel of the printer itself.

Using lpoptions

lpoptions  -p <printer_name> | awk '{for (i=1; i<=NF; i++) {if ($i ~ /device-uri/) {print $i}}}'

Example

$ lpoptions  -p TOSHIBA_e-STUDIO2330C | awk '{for (i=1; i<=NF; i++) {if ($i ~ /device-uri/) {print $i}}}'

device-uri=socket://192.168.20.43

To get an overview lpinfo

Example

$ lpinfo -v | grep -P '://'

network dnssd://HP%20LaserJet%201022n._pdl-datastream._tcp.local/

network dnssd://TOSHIBA%20e-STUDIO2540C-07279076._printer._tcp.local/

network socket://192.168.20.201

network socket://192.168.20.203

network socket://192.168.20.204

network socket://192.168.20.205

network socket://192.168.20.206

network socket://192.168.20.207

network socket://192.168.20.43

or nmap

nmap -sT <adress_or_address_range>

and grep the service printer

Example

$ nmap -sT 192.168.20.43



Starting Nmap 6.47 ( http://nmap.org ) at 2015-07-03 08:38 CEST

Nmap scan report for 192.168.20.43

Host is up (0.0017s latency).

Not shown: 991 closed ports

PORT     STATE SERVICE

21/tcp   open  ftp

25/tcp   open  smtp

80/tcp   open  http

139/tcp  open  netbios-ssn

445/tcp  open  microsoft-ds

515/tcp  open  printer

631/tcp  open  ipp

8080/tcp open  http-proxy

9100/tcp open  jetdirect

Look at the arp-scan command (similar to ip neigh). You will probably have to install it:

sudo apt-get install arp-scan

And to give further detail:

sudo arp-scan --interface=eth0 --localnet

Where eth0 is your device (or wlan0 or wlp2s0). You can find your device with ifconfig or:

ip -c addr

Or try installing nmap (sudo apt-get install nmap) and type nmap 192.168.1.0/24 substituting 192.168.1 with the first three parts of your ip address (find out using ip addr).

lpstat -s

Sometimes it doesn't have to be complicated.

I am also using ubuntu14.04. If you want to see the IP of the printer which was installed, you'd better go to system settings and choose Printers. Then please choose the printer and see its properties. In the setting tab inside the properties, there is Device URI. Click on it and see the IP.