using sed

I'm trying to use sed to append "/0.0.0.0" to the end of each line in a file

sed -i 's;$;/0.0.0.0;g' file.txt

problem is most of the time, "/0.0.0.0" is made as a new line after the existing ones, instead of being appended to the ends of the lines

so instead of:
text/0.0.0.0

I get:
text
/0.0.0.0

>>33
I read Einstein's On Relativity and understood it. I'm sorry if you need someone to give you Head First Relativity and hold your hand through a four-semester course on enterprise relativity theory.
Your analogy is broken, anyway, because the documentation is there and it's great.