PDF double sided printing

[adams]

A quick search on the Internet doesn't turn up a easy
solution.

Have a PDF file.  I'd like to print double-sided on an
HP 1020 Laserjet which does simplex.  I don't see a
utility handy for 64-bit kubuntu that does it.

Acrobat does not run on x86_64 architecture as their
binary is for 32-bit.

Any help is appreciated if you have been there and done
this.

ciao,

Chuck Adams