Setting up process.env variables using EXPORT while running node with sudo

To set process.env variable use the following code:

sudo PORT=80 node server.js

Of course, you can set multiple process.env variables:

sudo PORT=80 HOST=localhost node server.js

Normally, EXPORT should work too. But sudo creates its own environments and then starts your program as root. So, you shall either add PORT to sudo's environment or force it to preserve your own environment.

To change sudo's environment you shall modify /root/.profile.

To force it to preserve your own environment use -E key:

sudo -E node app.js