How do I view my environment variables?

bash, environment-variables, ruby-on-rails, terminal

Solution

Printing the Environment from the Shell

As other answers have pointed out, one can use `/usr/bin/env` or `/usr/bin/printenv` from the command line to see what the environment is in the shell before starting Rails, or in a subshell after starting it. For example:

- `rails s` RETURN

- CTRL-Z

- `env` RETURN

- `fg` RETURN

Displaying ENV from the View Layer

In Ruby, ENV is a "hash-like" accessor for environment variables; it is not actually a Hash. You can introspect ENV from your Rails console easily enough simply by typing `ENV` or `ENV['foo']`, but sometimes you may want to see what Rails thinks the environment is during rendering. In that case, you want the Rails debug helper. For example:

# ERB
<%= debug ENV.to_h.to_yaml %>

# HAML
= debug ENV.to_h.to_yaml

Calling #to_yaml to serialize the ENV object will make the output easier to read, but requires you to convert ENV to a hash or array first. You can also just invoke `debug ENV` without chaining; it's just harder on the eyes.

Problem

I am trying to connect to my pusher server but am receiving the error: Missing client configuration: please check that key, secret and app_id are configured. I want to check my environmental variables, but cannot find any clear way to do this on Stack Overflow yet.

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