I have installed Grunt & Bower & I\'m using ZSH.
when I type bower --help or grunt anything I get zsh: command not found: bower>
bower --help
grunt anything
zsh: command not found: bower>
If you are using the GNOME-Terminal (default in Ubuntu Unity and Gnome) try the answer of https://askubuntu.com/questions/279180/nvm-command-not-found-issue.