TL;DR This post exists because I forgot how to start locally installed Postgres before a talk. I don’t normally have a section like this, but since I’ll probably be the one referencing this post again in the future: apt install postgres # or whatever for your distro initdb --no-locale -D <data-dir> pg_ctl -D <data-dir> -l <log-file> start on MacOS: brew install postgresql brew services start postgres psql postgres Context Every once in a while you forget how to use a tool and are humbled ...