Re: CUPS - how to match autodetected printers to physical ones
On Fri 08 Apr 2022 at 13:22:26 -0400, Greg Wooledge wrote:
> On Fri, Apr 08, 2022 at 06:03:47PM +0100, Tixy wrote:
> > On Fri, 2022-04-08 at 17:59 +0100, Tixy wrote:
> > > On Fri, 2022-04-08 at 12:10 -0400, Greg Wooledge wrote:
> > > > Unfortunately, I was not able to find ANY way to determine the IP
> > > > addresses of the autodetected printers that were presented to me.
> > >
> > > If I go to http://localhost:631/printers/
> >
> > I should say I got to that URL from the CUPs interface at
> > http://localhost:631/ then clicking the 'Admininitation' tab at the top
> > followed by the 'Manage Printers' button on the page that showed.
>
> Here is what I have on that page:
>
> =====================================================================
> Showing 7 of 7 printers.
>
> Queue Name Description Location Make and Model Status
> Canon_LBP351dn_f9_7a_4a_ CNLBP712C CNLBP712C, driverless, cups-filters 1.28.7 Idle
> Canon_LBP712Cdn_db_c0_d3_ Canon_LBP712Cdn_db_c0_d3_ CNLBP712C CNLBP712C, driverless, cups-filters 1.28.7 Idle
> Cups_PDF_oc3261540276 Cups_PDF_oc3261540276 Local Raw Printer Paused
> HP_LaserJet_4100_Series_0001E6A68D3D_ HP_LaserJet_4100_Series_0001E6A68D3D_ HP LaserJet 4100 Series , driverless, cups-filters 1.28.7 Idle
> hp_LaserJet_4250_621E13_ hp_LaserJet_4250_621E13_ hp LaserJet 4250, driverless, cups-filters 1.28.7 Idle
> HP_LaserJet_P3010_Series_0FCDD7_ HP_LaserJet_P3010_Series_0FCDD7_ HP LaserJet P3010 Series, driverless, cups-filters 1.28.7 Idle
> PostScript_oc3261540276 PostScript_oc3261540276 Local Raw Printer Paused
> =====================================================================
[...]
> Looking at the stuff that I pasted here, how am I supposed to know whether
> this corresponds to the physical printer with IP address 10.76.172.100?
Let's eliminate Cups_PDF_oc3261540276 and PostScript_oc3261540276
first. These are local, manually set up print queues (not discovered).
The queue name doe not end with an underscore, indicating they are not
physical printers. (oc3261540276 identifies the host, but why that
format?)
The remaining five entries are printers. The "driverless, cups-filters"
indicates that cups-browsed has automatically set up local print queues
for them. They are on the same subnet as your device. 10/10 up to now
for the printing system.
This leaves two Canons and three HPs. What make is the printer in the
room? Canon? Still don't want to guess? Then
avahi-browse -rt _ipp._tcp | grep -B 2 "10.76.172.100"
Another 10/10 fot the printing system and the tools it uses.
Of course, knowing the queue name in advance would be more desirable and
lead to less frustration.
--
Brian.
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