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2.9 KiB
look: Linux 下验证拼写并显示以某字符串开头的行的命令
你有没有感到需要一款Linux下的命令行工具,它可以验证你的拼写?一款可以显示包含特定前缀字符串的行?好的,本篇中,我们会讨论Linux下的 look命令,它满足了上面的这些要求。
Linux下的look命令
下面是来自look命令man页面描述的截图:
测试环境
- OS – Ubuntu 13.04
- Shell – Bash 4.2.45
- Application – look 2.20.1-5.1ubuntu8
简要教程
现在让我们通过一些特定例子来讨论这个命令。
假设你要验证单词'rendezvous'的拼写。你可以轻松地用look命令做到。
这是个例子 :
$ look rendez
rendezvous
rendezvous's
rendezvoused
rendezvouses
rendezvousing
如你所见,我只传入了单词的前面几个字符作为命令行参数,命令产生了所有的相关单词。这些单词通过look命令从文件 /usr/share/dict/words取回。
另外一种情况是需要打印所有包含特定字符串的行。比如,如果我想要显示c文件中所有的头文件,那么我就用下面的方法:
$ look "#include" efence_test.c
#include <stdio.h>
#include <stdlib.h>
如你所见,它生成了所有的在文件efence_test.c中以"#include"开始的行,因此我知道了原文件中包含的头文件。
默认上,所有look命令的匹配都是大小写敏感的。你可以使用非大小写敏感匹配的选项**-f**。
下面是一些look命令提供了其他一些命令行选项:
想要获取这个命令的更多信息,阅读这个 man 页.
下载/安装/配置
下面是关于look命令的一些链接:
- 主页 [如果你知道这个工具的主页的话让我知道一下]
- 下载链接
look命令成了util-linux包的一部分,它在大多数Linux发行版中已经预安装了。
优点
- 非常容易地在命令行验证拼写。
- 在大多数Linux发行版中已经预安装。
缺点
- 依赖于/usr/share/dict/words 来做拼写验证。
总结
一款出色的用来验证拼写的命令行工具。节省了大量时间如果你想要显示以特定字符串为开头的行的话。试一下,你一定会喜欢上它的。
via: http://mylinuxbook.com/look-verify-spellings-and-display-lines/