Just relogin, problem fixed.
For the long way: export should be a shell built in, so no matter what PATH you have, it will always be found. Common places for the path are /bin and /usr/bin, and that should get the system usable. The distribution you use will probably store certain programs elsewhere, possibly there might be a /usr/games/bin, and thats not even looking at the /opt options. Typing "source ~/.bash_profile" should fix the issue. 'Source' is also a builtin i think.