basename + dirname fun

• shell> dirname /long/path/file.jpeg
  output: /long/path
• shell> basename /long/path/file.jpeg
  output: file.jpeg
• shell> basename /long/path/file.jpeg .jpeg
  output: file
  This one is sooo amazing, ah?!

convert

convert tool comes with ImageMagick. It allows extensive image-manipulation-by-command-line. I've just found out that it supports -resize xx% form, although not mentioned in manpage.

Putting it all together

The 2nd parameter of basename is really useful in mass-filename-scripts. Let's write a script for mass-resizing all jpegs to 50% of their original size:

for i in *.jpeg; do convert -resize 50% $i basename $i .jpeg-resized.jpeg; done