Touch may refer to any of the following:
1. When describing an action, touch is the act of placing one or more fingers on a surface. For example, with a touch screen, you are interacting with the screen using a finger. In other words, if you're using a touch screen now and want to open a link, you'd touch the link, or to scroll, you'd swipe the finger up or down on the screen.
Touch screens that support multiple fingers touching the screen at the same time are known as multi-touch screens. Not all touch screens support this ability.
2. With a command line interface, touch is a command that can create a file. If a file already exists, the file's timestamp is updated. See our touch command page for further information, examples, and syntax of this command.