$ sudo npm install psi
$ sudo npm install -g psi

If want to update the psi package execute the command as below,

$ sudo npm update psi

Update package globally,

$ npm install -g psi

Git clone:

$ sudo  git clone https://github.com/rektide/psi.git

$ sudo  npm install -g ./psi

psi@3.0.0 /usr/lib/node_modules/psi

How to remove psi package :

You can uninstall or remove this package from your node_modules run the command as below,

$ sudo npm uninstall psi

Basic Information of psi NPM Package: