This isn't maybe the best way, but it does work:

Code:

sed -E 's/$/./; s/abc=123([^0-9])/abc=999\1/g; s/.$//;'

At least with your small example.


If you are using AT&T's AST sed, or a BSD flavour of sed the -E option will be different.

---------- Post updated at 11:53 ---------- Previous update was at 11:49 ----------

@CarloM -- my thought exactly, but it still wasn't treating the newline as [^0-9], so I added the dot to ensure abc=123$ had some character after it. Maybe I was doing something wrong, but I couldn't get it to work just with the back reference.


Did I miss something?