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

knowledge/ignorance is not the same as intellect

The reason good programmers are dwindling in numbers is because nobody bothers to actually teach anybody anything.

There are plenty of people who could become good programmers if the knowledge were actually available to them.