some ideas from Corona Virus "Stay at Home" order

[Richard D. Williams]

Sometimes I think of some neat things I've done over the years and just 
feel like sharing.

Here are a few: (linux OS)

Merge PDFs into a single new PDF:
/usr/bin/gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite 
-sOutputFile=file_new.pdf file1.pdf file2.pdf

Extract Pages from a PDF:
i.e. page 1-4
/usr/bin/gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -dFirstPage=1 
-dLastPage=4 -sOutputFile=file_new.pdf file1.pdf

Extract Pages from page # to end:
/usr/bin/gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -dFirstPage=2 
-sOutputFile=file_new.pdf file1.pdf

Get the numbers of pages in a PDF:
/usr/bin/pdfinfo file1.pdf | grep "Pages:" | sed s/"Pages:"//g | sed s/" 
"//g
i.e.
8

Get the Lat/Long from a JPG image:
exiftool -n -gpslatitude -gpslongitude file2.JPG
i.e.
GPS Latitude                    : 31.4998652777778
GPS Longitude                   : -100.448014444444

I hope someone finds this useful.

Be safe out there,

Richard D. Williams





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