optimize is a wrapper around various file size optimization tools. It currently losslessly optimizes these mime types:

• application/javascript
• application/x-virtualbox-vdi
• image/gif
• image/jpeg
• image/png
• image/x-apple-ios-png
• text/css
• text/html

lossy optimzation (sorta) of these mime types is supported

• video/mp4
• video/quicktime[1]
• video/webm[1]
• video/x-matroska[1]

[1] files are converted to mp4 during optimzation

optimize relies on these tools (depending on the mime types you like to optimize): gifsicle, jpegoptim, optipng, VBoxManage, yui-compressor, ffmpeg

If you like to optimize images:

    sudo apt-get install gifsicle jpegoptim optipng

If you like to optimiue video files:

    sudo apt-get install ffmpeg

If you like to optimize CSS and JavaScript:

    sudo apt-get install yui-compressor

If you like to optimize Virtual Disk Images (VDI):

    sudo apt-get install virtualbox

If you like to optimuze video files:

    sudo apt-get install ffmpeg