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install_postgresql_mac_&_linux.md

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#Install PostgreSQL on Mac OS X / Linux A simple guide on how to install PostgreSQL on your local Mac or Linux machine.

Using Homebrew

Install Homebrew: Linux | Mac

brew update
brew upgrade
brew doctor
brew install postgresql --with-python

Activate PostgreSQL

Quick activation:


mkdir -p ~/Library/LaunchAgents 
ln -sfv /usr/local/opt/postgresql/*.plist ~/Library/LaunchAgents
launchctl load ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist

The above command comes from a fresh install of postgresql via Homebrew which will show you:

If builds of PostgreSQL 9 are failing and you have version 8.x installed,
you may need to remove the previous version first. See:
  https://github.com/Homebrew/homebrew/issues/2510

To migrate existing data from a previous major version (pre-9.4) of PostgreSQL, see:
  https://www.postgresql.org/docs/9.4/static/upgrading.html

To have launchd start postgresql at login:
  ln -sfv /usr/local/opt/postgresql/*.plist ~/Library/LaunchAgents
Then to load postgresql now:
  launchctl load ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist
Or, if you don't want/need launchctl, you can just run:
  postgres -D /usr/local/var/postgres

If you already had previously postgresql installed, you would see:

To reload postgresql after an upgrade:
  launchctl unload ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist
  launchctl load ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist
Or, if you don't want/need launchctl, you can just run:
  postgres -D /usr/local/var/postgres

Now, test postgresql with:

createdb
psql

You should see something like:

psql (9.4.5)
Type "help" for help.

jmitch=#

Where jmitch would be your username.