SED插入行命令OSX
it1352
帮助1人
问题说明
I'm trying to insert text to the third line in a file using sed, and the syntax I've found on other forums is:
sed -i '' "3i\ text to insert" file
当我用这个但是，我得到一个错误：
When I use this however, I get an error:
sed: 1: "3i\ text to insert": extra characters after \ at the end of i command
我似乎无法找出是什么原因造成的问题。我使用OSX，这就是为什么我有一个空''我的扩展。
I can't seem to figure out what is causing the problem. I'm using OSX, which is why I have an empty ' ' as my extension.
谢谢！
正确答案
#1
您应该直接把后一个换行符 \\ ：
You should put a newline directly after the \:
sed '3i\
text to insert' file
这实际上是由 POSIX规范定义的行为。即GNU sed的事实，您可以指定文本将在同一行插入是一个扩展。
This is actually the behaviour defined by the POSIX specification. The fact that GNU sed allows you to specify the text to be inserted on the same line is an extension.
这篇好文章是转载于：学新通技术网
