只打印匹配的字，而不是整行通过grep [英] Print only matching word, not entire line through grep

问题描述

我对bash中的shell编程很熟悉，但由于某些原因 egrep -o 仅打印匹配的字符不起作用，并显示如下错误。

环境是ksh unix控制台上的putty，而不是linux或ubuntu终端......任何建议值得赞赏！

终端输入&输出：

  AB12 $ echo我是男孩| grep -wam
我是男孩
 AB12 $回声我是男孩 egrep -oam
 egrep：非法选项-o 
用法：egrep [-bchilnsv] [-e exp] [-f文件] [字符串] [文件] ... 
 AB12 $ echo $ 
 ksh：echo $：找不到
 AB12 $ echo $ SHELL 
 / bin / ksh 
 AB12 $ echo我是男孩 grep -oam
 grep：非法选项 -  o 
用法：grep -hblcnsviw模式文件。 。 。 
 AB12 $ 
  

PS： grep只能显示与搜索模式相匹配的文字吗？

解决方案

我假设这是您连接到的Solaris机器。 Solaris的版本 grep 没有 -o 选项。所以你可以在你的Solaris机器上安装GNU grep（它可能已经安装在 / usr / sfw / bin ，或者你也可以运用 pkg install // solaris / text / gnu-grep ）;或

改为使用awk（请参阅此SO问题）

查看我的信箱：

  $ uname 
 SunOS 
 $ echo我是男孩| grep -oam
 grep：非法选项 -  o 
用法：grep -hblcnsviw模式文件。 。 。 
 $ echo我是男孩| / usr / sfw / bin / ggrep -oam
 am 
  

I am familiar with shell programming in bash, but for some reason egrep -o to print only matching words is not working and displays error as below.

Environment is ksh unix console on putty and not linux or ubuntu terminal......any advice is appreciated!

Terminal input & output :

AB12 $ echo "i am a boy" | grep -w "am"
i am a boy
AB12 $ echo "i am a boy" | egrep -o "am"
egrep: illegal option -- o
usage: egrep [ -bchilnsv ] [ -e exp ] [ -f file ] [ strings ] [ file ] ...
AB12 $ echo$
ksh: echo$: not found
AB12 $ echo $SHELL
/bin/ksh
AB12 $ echo "i am a boy" | grep -o "am"
grep: illegal option -- o
Usage: grep -hblcnsviw pattern file . . .
AB12 $

PS : Similar thread but tried already : Can grep show only words that match search pattern?

解决方案

I am assuming this is a Solaris box you are connecting to. Solaris' version of grep does not have the -o option. So you can either

• install the GNU grep on your Solaris box (it might already be installed in /usr/sfw/bin, or you might have luck with pkg install //solaris/text/gnu-grep); or
• use awk instead (see this SO question)

See on my box:

$ uname
SunOS
$  echo "i am a boy" | grep -o "am"
grep: illegal option -- o
Usage: grep -hblcnsviw pattern file . . .
$  echo "i am a boy" | /usr/sfw/bin/ggrep -o "am"
am

这篇关于只打印匹配的字，而不是整行通过grep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！