~/.local/share/jupyter/nbextensions/snippets/snippets.json

snippets.json

{
    "snippets" : [
        {
            "name" : "example",
            "code" : [
                "# This is an example snippet!",
                "# To create your own, add a new snippet block to the",
                "# snippets.json file in your jupyter nbextensions directory:",
                "# /nbextensions/snippets/snippets.json",
                "import this"
            ],
	    "name" : "backup",
	    "code" : [
		"notebook = 'overfit'",
		"!jupyter nbconvert {notebook}.ipynb",
		"!mkdir -p htmls/{notebook}",
		"!mv {notebook}.html htmls/{notebook}/`date +\"%H:%M-%d.%b.%Y\"`.html"
	    ]
        }
    ]
}