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Find the environment variables of a nodejs process in linux

If you have an active nodejs process running on your system, the easiest way to check what environment variables it is using can be done in 2 simple steps.

1. Identify the process id of your nodejs app

pe -ef | grep node

1. Use the PID you found in the above step in the following command

sudo cat /proc/PID/environ | tr \0 \n

The above command spits out a large bunch of key-valye pairs. You can always grep it for the variables you are interested in. e.g.

sudo cat /proc/PID/environ | tr \0 \n | grep NODE_ENV

To check the environment variables from within the code itself, simply log the value of the variable process.env anywhere in your code.

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Also Read:

1. What is npm shrinkwrap and when is it needed
2. Creating a simple event emitter using nodejs
3. Setup nginx with multi domain websites running on nodejs
4. Understanding nodejs module exports and require
5. Installing, Listing and Uninstalling packages using npm

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