ubuntu duplicate text shortcuts code example

Example: ubunutu duplicate shortcuts

{ "key": "shift+alt+down",        "command": "editor.action.copyLinesDownAction",
                                     "when": "editorTextFocus" },
{ "key": "shift+alt+up",          "command": "editor.action.copyLinesUpAction",
                                     "when": "editorTextFocus" },