Today I Learned

Running `ulimit -Sn 10240` exposed the failed expectation behind an `Errno::EMFILE` error in my RSpec and Capybara test.

You just installed PostgreSQL and attempt to run psql and get the following error: FATAL: database 'user' does not exist. Here's how to fix it

I ran into this error when installing the thin Ruby Gem on MacOS and found the solution.