Linux sed 将带有空格的行插入到特定行
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sed insert line with spaces to a specific line
提问by Yo Al
I have a line with spaces in the start for example " Hello world". I want to insert this line to a specific line in a file. for example insert " hello world" to the next file
我在开头有一行空格，例如“Hello world”。我想将此行插入文件中的特定行。例如在下一个文件中插入“hello world”
hello
world
result:
结果：
hello
hello world
world
I am using this sed script:
我正在使用这个 sed 脚本：
sed -i "${line} i ${text}" $file
the problem is that i am getting my new line with out the spaces:
问题是我的新行没有空格：
hello
hello world
world
采纳答案by Atropo
You can escape the spacecharacter, for example to add 2 spaces:
您可以对space字符进行转义，例如添加 2 个空格：
sed -i "${line} i \ \ ${text}" $file
Or you can do it in the definition of your textvariable:
或者您可以在text变量的定义中执行此操作：
text="\ \ hello world"
回答by devnull
$ a=" some string "
$ echo -e "hello\nworld"
hello
world
$ echo -e "hello\nworld" | sed "/world/ s/.*/${a}.\n&/"
hello
some string .
world
The .was added in the substitution above to demonstrate that the trailing whitepsaces are preserved. Use sed "/world/ s/.*/${a}\n&/"instead.
的.是在上述取代加到证明尾随whitepsaces被保留。使用sed "/world/ s/.*/${a}\n&/"来代替。
回答by LeoChu
You only need one \to input multiple blanks
like this
你只需要一个\这样输入多个空格
sed -i "${line} i \ ${text}" $file
回答by dashohoxha
It can be done by splitting the expression like this:
可以通过像这样拆分表达式来完成：
sed -i $file -e '2i\' -e " $text"
This is a GNU extension for easier scripting.
这是一个 GNU 扩展，用于简化脚本编写。
