xdg-icon-resource command_examples

xdg-icon-resource – command line tool for (un)installing icon resources

To install an icon resource to depict a launcher for the application myfoobar, the company ShinyThings Inc. can use:

xdg-icon-resource install --size 64 shinythings-myfoobar.png

To install an icon for a new application/x-foobar file type one can use:

xdg-icon-resource install --context mimetypes --size 48 ./mime-foobar-48.png application-x-foobar
xdg-icon-resource install --context mimetypes --size 64 ./mime-foobar-64.png application-x-foobar

This will install two icons with the name application-x-foobar but with different sizes.