{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/4\/4c\/Create-and-Edit-Text-File-in-Linux-by-Using-Terminal-Step-23.jpg\/v4-460px-Create-and-Edit-Text-File-in-Linux-by-Using-Terminal-Step-23.jpg","bigUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/4\/4c\/Create-and-Edit-Text-File-in-Linux-by-Using-Terminal-Step-23.jpg\/v4-760px-Create-and-Edit-Text-File-in-Linux-by-Using-Terminal-Step-23.jpg","smallWidth":460,"smallHeight":345,"bigWidth":760,"bigHeight":570}3了解Emacs命令。(如:Ctrl和A)。Alt键,所以也可能是Esc键)。