How to clear screen in linux

Nov 07, 2019 am 09:13 AM
linux

在windows的DOS操作界面里面,清屏的命令是cls,那么在linux 里面的清屏命令是什么呢?下面分享几种在linux下用过的清屏方法。

How to clear screen in linux

1、clear命令、这个命令将会刷新屏幕,本质上只是让终端显示页向后翻了一页,如果向上滚动屏幕还可以看到之前的操作信息。

2、Ctrl+l(小写的L),这是一个清屏的快捷键,这个是笔者在工作中用得最多的一种清屏方式,清屏效果同clear命令一样。         (推荐学习:linux运维

3、reset命令,这个命令将完全刷新终端屏幕,之前的终端输入操作信息将都会被清空,这样虽然比较清爽,但整个命令过程速度有点慢,使用较少。

值得一提的是reset命令在你的终端控制错乱时非常有用。如输入字符不出现在光标的位置的情况。还有当你敲击回车键时,新提示符并没有出现在新行上

而是出现在老提示符的前面。此时reset命令就能用来修正这些问题。

4、printf "\033c"命令

这个命令它才是真正的清空了终端屏幕,它的功能跟DOS里CMD.EXE提供的CLS效果很相似。但这个命令究竟是做什么的?它的工作原理是什么?

    \033  ==  \x1B == 27 == ESC
Copy after login

于是,这个命令变成了c,它是VT-XXX中表示“Full Reset (RIS)”的转义码。现今我们使用的所有的终端都是VT兼容的,它的另一种实现方式也可以这样:

键盘上Ctrl+v--->Esc-->输入c再回加。但如果你发现自己使用的是一个非常奇怪的终端(如笔者曾经在putty上作过测试),那这个命令你可能用不了。

printf是bash里内置的命令,内置命令的优先级比其它可执行文件要高。

通过上面的4个清屏方式比较,在PATH路径下,如/usr/bin/目录下。新建一个名为cls的文件,加上执行权限,写入如入内容:

How to clear screen in linux

这样的话我们每次需要清屏的时候,只需要输入cls命令就可以了。

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