Grep匹配仅在“:"之前 [英] Grep match only before ":"

查看：73 发布时间：2020/11/20 21:17:32 grep

本文介绍了Grep匹配仅在“:"之前的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

你好，我怎样才能只在:标记之前匹配?

Hello How can I grep only match before : mark?

如果我运行grep test1 file，它将显示所有三行.

If I run grep test1 file, it shows all three lines.

test1:x:29688:test1,test2
test2:x:22611:test1
test3:x:25163:test1,test3

但是我想得到一个输出test1:x:29688:test1,test2

But I would like to get an output test1:x:29688:test1,test2

我将不胜感激.

如果所需的行始终以test1开头，则可以执行以下操作:

If the desired lines always start with test1 then you can do:

grep '^test1' file

如果它总是跟在:后面，而不是其他(潜在)匹配项，那么您可以将其作为模式的一部分:

If it's always followed by : but not the other (potential) matches then you can include it as part of the pattern:

grep 'test1:' file

这篇关于Grep匹配仅在“:"之前的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

查看全文

Grep匹配仅在“:"之前 [英] Grep match only before &quot;:&quot;