I'm not experienced with PATH (Any good reference would be appreciated), but I made a mistake and did
PATH=/google_appengine, which I'm assuming completely overrid PATH.
Still, I restarted bash and echo'd PATH and found that the folders were back.
mark@mark-laptop:~$ echo $PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
However, when I then tried to append to it, I got an error that PATH wasn't found. I've looked around Google and couldn't find a good answer. Any help would be appreciated
mark@mark-laptop:~$ PATH = $PATH:/google_appengine
PATH: command not found