替换UNIX中的文本

Question

我有text1.txt，它包含

<this can be anything, any number of line - no hardcoded>
<this can be anything, any number of line - no hardcoded>
     param1=<this can be any value - no hardcoded>
<this can be anything, any number of line - no hardcoded>
<this can be anything, any number of line - no hardcoded>

我想用替换这个部分，它可以是任何值-没有硬编码的，用abc

什么是正确的SED命令？请注意，由于环境限制，我没有使用任何语言(如perl、python或ruby ~)的灵活性，只能使用Unix命令。除了param1之外，没有硬编码。

提前谢谢！

Answer 1

你想要的调用是

sed -e 's/param1=.*/param1=abc/' text1.txt

Answer 2

听起来你想要像s/<.\+>$/<abc>/一样的东西

$ cat test1.txt

<this can be anything, any number of line - no hardcoded>
<this can be anything, any number of line - no hardcoded>
     param1=<this can be any value - no hardcoded>
<this can be anything, any number of line - no hardcoded>
<this can be anything, any number of line - no hardcoded>

$ sed 's/<.\+>$/<abc>/' test1.txt

<abc>
<abc>
     param1=<abc>
<abc>
<abc>