How do I print in duplex?
It is possible to print in duplex using the command line from many of the printers in the Department. You will need to print using lpr to accomplish this. In order to print in duplex, pass lpr the option "-o Duplex=DuplexNoTumble", which will tell it you would like to print in duplex.
Example:
$ lpr -Pbw137aer -o Duplex=DuplexNoTumble foo