Q: How to manipulate all image files in directory at once?

1. Read General Notes
2. To install bash batch image processing script
   1. Read How to add extra repositories?

   2. sudo apt-get install imagemagick
      wget -c https://frankandjacq.com/ubuntuguide/bbips.0.3.2.sh
      sudo cp bbips.0.3.2.sh /usr/bin/bbips
      sudo chmod 755 /usr/bin/bbips

3. To manipulate all image files in directory at once

   bbips