$ sudo npm install signal
$ sudo npm install -g signal

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

$ sudo npm update signal

Update package globally,

$ npm install -g signal

Git clone:

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

$ sudo  npm install -g ./signal

signal@3.2.0 /usr/lib/node_modules/signal

How to remove signal package :

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

$ sudo npm uninstall signal

Basic Information of signal NPM Package: