Re: Problem with 'sed' command

[Paolo Bonzini]

> sed 's/Kitten'/Kitten"/g' cat.txt
>
> but it throws and error saying
>
> Unmatched '

This is actually a shell error.  You are welcome to send requests like 
this to forums such as address@hidden; the short answer is to 
use proper shell quoting, as in

  sed "s/Kitten\'/Kitten\"/g" cat.txt

Paolo