nodejs vs node on ubuntu 12.04

I installed nodejs on ubuntu from instructions given [here][1] When I write `node --version` in the terminal I see this : <br> `-bash: /usr/sbin/node: No such file or directory` I can see node in the `/usr/sbin/` directory, though. Writing `npm --version` shows `1.3.5` <br> Writing `nodejs --version` shows `v0.10.15` Also, I can see node in the `/usr/bin/` directory. So, how do I get `node` working? Also, If I use *zsh* instead of bash, then `node` command works. [1]: https://github.com/joyent/node/wiki/Installing-Node.js-via-package-manager#ubuntu-mint