[lug] Odd Shell Script Queries

David Anselmi anselmi at anselmi.us
Tue Jan 18 16:44:42 MST 2005

Chip Atkinson wrote:
> On Tue, 18 Jan 2005, Matt Thompson wrote:
>>>echo "ibr-.355.3graph.notitle.pdf"| tr '\.' '_'
> I'd pipe it through sed myself: 
> echo ibr-.355.3graph.notitle.pdf | sed -e 's/\./_/g' -e 's/_pdf$/.pdf/'

sed isn't bad if you don't know the extension:

sed -e 's/\./_/g' -e 's/_\([a-z][a-z][a-z]\)$/.\1/'

but if your regex gets much more involved you'll want Perl.  But if you 
know, basename can strip the extension for you:

for file in *.pdf ; do
   name=$(basename $file .pdf)
   name=$(echo $name | tr '\.' '_')
   mv $file $name.pdf

> If you can create the same document in color and black and white, you
> could diff the two and look for kewords.  Then you could use grep to
> search for them and if found print to color.

Or just print the whole thing in b/w and print the few pages in color. 
Your print command ought to have a way to select pages to print.


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