[lug] Odd Shell Script Queries

Matt Thompson thompsma at jilau1.colorado.edu
Tue Jan 18 15:09:39 MST 2005

Oh knowledgeable ones, I have a couple shell script queries.  First, the
one I believe there might be an answer to.

Is there an easy way to batch-convert filenames from using dots as
separators to underscores *while leaving the final dot*?  That is, I
know I can do:

> echo "ibr-.355.3graph.notitle.pdf"| tr '\.' '_'

but now the final "." is an "_".  I'm sure I could use Perl or something
to chomp off the last bit, do the translation, and re-concatenate the
end back, but I thought I'd ask if someone here knew a nice way.  (If
you're wondering, LaTeX is b0rking on my habit of using dots in

My second script question is a bit more involved.  Namely, at my work we
have multiple printer queues.  Two are a LaserJet and Color LaserJet,
with the Color one being more expensive.  I began to wonder if there was
a script that parsed a PS or PDF file in such a way that only pages with
color are sent to a color printer, while the rest are sent to the mono.
I'm not enough of a PS/PDF guru to know if this is even possible, but
for a large, mainly-text file (say a thesis) with a few color diagrams,
it would be interesting to know if it exists.

Thanks for the help,

Learning just means you were wrong and they were right. - Aram
   Matt Thompson -- http://ucsub.colorado.edu/~thompsma/
   440 UCB, Boulder, CO  80309-0440
   JILA A510, 303-492-4662
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