CUPS should probably support lpr -Pprinter2

[geofft]

For backwards-compatibility reasons, we should continue to support -Pprinter2 in the CUPS world. We don't currently configure these printers on cups.mit.edu; we can either do so, and figure out how to make a queue that duplexes by default, or figure out if this can be auto-generated locally.

One issue to avoid is displaying printer2 printers in the graphical browser.

[quentin]

Cups's model for this is a more general solution called 'printer instances'. You can create an instance with:

lpoptions -p printer/duplex -o sides=two-sided-long-edge

and then print to it with

lpr -Pprinter/duplex

I think there's no way to get rid of the slash, however.

[broder]

printers.mit.edu does actually have the duplex queues, for what it's worth.

[broder]

We're switching to printers.mit.edu for cluster machines, which will fix this issue by virtue of printers.mit.edu having generated duplex queues