我需要使用SED将一个字符串替换为一个URL

Question

When I use a normal value like a=10

I am able to get the sed find/replace working

  sed -e "s/xxx/$a/g" a.txt

But when I try to use a variable like a=http://xyz.com

sed -e "s/xxx/$a/g" a.txt is not working...

Its throwing unknown option error which I assume is due to the escape characters that are present over the variable

Answer 1

With awk your string can contain ANY character, including /, @, newline, whatever:

$ a="http://xyz.com"
$ echo "<xxx>" | awk -v a="$a" '{gsub(/xxx/,a)}1
<http://xyz.com>

Answer 2

尝试这个：

sed -e "s@xxx@$a@g" a.txt