bash 在 sed 命令中使用变量
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Using variables in a sed command
提问by Ozkan
I'm trying to add some text (a path) at the end of a line which is found by a sed command:
我正在尝试在 sed 命令找到的行的末尾添加一些文本（路径）：
var="/folder1/folder2/folder3"
sed -i "/Begins with this text/s/$/$var/" filename
I know that double quotes are needed to use variables in a sed command but if I use the above command it gives me an error message saying:
我知道在 sed 命令中使用变量需要双引号，但是如果我使用上面的命令，它会给我一条错误消息：
expresssion #1, character 23: unknown option to `s
What am I doing wrong?
我究竟做错了什么？
回答by Barmar
Change the delimiter in the substitute command to something that won't appear in $var, e.g.
将替换命令中的分隔符更改为不会出现在 中的内容$var，例如
sed -i "/Begins with this text/s|$|$var|" filename
or escape the slashes in $var:
或转义斜线$var：
var="\/folder1\/folder2\/folder3"
