Apenas alguns links para imprimir apartir da linha de comando lpr no terminal (Aplicativos>Acessórios>Terminal) no ubuntu 10.04

http://gnulinuxbr.com/2010/12/21/imprimindo-via-linha-de-comando-com-o-lpr/

http://conectiva.com/doc/livros/online/10.0/usuario/pt_BR/ch08s08.html

http://www.purainfo.com.br/linux/607/

https://www.google.com/search?q=exemplo+comando+lpr+linux&ie=utf-8&oe=utf-8&client=ubuntu&channel=fs#q=exemplo+comando+lpr+linux&hl=pt-BR&newwindow=1&safe=off&client=ubuntu&hs=jXJ&channel=fs&prmd=imvns&source=lnt&tbs=lr:lang_1pt&lr=lang_pt&sa=X&ei=SO7AT6TWGY2K8QTr8YXKAg&ved=0CFUQpwUoAQ&fp=1&biw=1312&bih=571&cad=b&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb