Convert .JPG or .PNG to .ICO using terminal and back
The most useful program (suite) to manipulate image is Imagemagick (sudo apt install imagemagick
) and for this task you will need the convert
binary.
You will need to use something like:
convert -resize x16 -gravity center -crop 16x16+0+0 input.png -flatten -colors 256 -background transparent output/favicon.ico