PostgreSQL error 'Could not connect to server: No such file or directory'

Question

Like some others I am getting this error when I run rake db:migrate in my project or even try most database tasks for my Ruby on Rails 3.2 applications.

Answer 1

Check there is no postmaster.pid in your postgres directory, probably /usr/local/var/postgres/

remove this and start server.

Check - https://github.com/mperham/lunchy is a great wrapper for launchctl.