resizing 2 picture or more in one process (batch processing)

[Bruce Grubbs]

I don't use gthumb, but with Image Magick's mogrify command, I routinely 
resize hundreds of images with one command, such as

mogrify -scale 1800x2700 *.tif

which will resize all the tif's in the current directory to 1800 pixels 
wide OR 2700 high. Mogrify works much faster than any of the gui 
programs I've used, such as GIMP. See man mogrify for more info, and 
www.imagemagick.org for detailed doc.

Bruce