Problem After installing NPM throught Ubuntu's default apt-get manager, I got permission errors. Though sudo can solve the problem, that's not the right way in principle because NPM is supposed to hold different versions of Node.js packages for testing. It's insecure to execute npm with sudo priviledges.
Solutions Install Zsh to improve efficiency
Grab Oh My Zsh to instal NVM as its plugin.
sh -c "$(curl -fsSL https://raw.