vi是最有用的系统上的标准文本编辑器。 （六是可视化编辑器短，发音是“V形眼。”）不同的Emacs，它是在几乎每一个UNIX系统在几乎相同的形式提供，从而提供了一种文本编辑一种通用语言。[1]同样可能是ED和前妻，但屏幕编辑说，一般更容易使用。带有屏幕编辑器，可以滚动页面，移动光标，删除线，插入字符，等等，在看到你的结果当你做了修改。屏幕编辑器很受欢迎，因为它们允许你做出改变，你通过文件阅读，就像你将编辑印刷本，只是速度更快。

-vi is the most useful standard text editor on your system. (vi is

short for visual editor and is pronounced "vee-eye.") Unlike emacs,

it is available in nearly identical form on almost every UNIX system,

thus providing a kind of text-editing lingua franca.[1] The same might

be said of ed and ex, but screen editors are generally much easier

to use. With a screen editor, you can scroll the page, move the

cursor, delete lines, insert characters, and more, while seeing the

results of your edits as you make them. Screen editors are very

popular, since they allow you to make changes as you read through

a file, like you would edit a printed copy, only faster.