Ubuntu: Fix "An error occurred while installing pg"
If you get an error like this:
An error occurred while installing pg (0.17.1), and Bundler cannot continue.
Make sure thatgem install pg -v '0.17.1'succeeds before bundling.
Then do this:
sudo apt-get install libpq-dev
... and run Bundler again.
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From the linked StackOverflow comment:
As fa...