Exercise PostgerSQL

1. Postgres Server Setup:
   Init a database cluster in a sub-directory "databases/postgresql/data" under your home-directory.
   Start the PostgreSQL server "postmaster" on that directory.
   Connect to the server with a psql client.

2. Create DB:
   Create a new DB named "workshop" and connect to that DB.
   Drop the workshop DB and re-create it.

3. Create User:
   Create a new user called "fred".
   Drop fred and recuperate him again.

4. Quit and Kill:
   Quit the psql client and kill the postmaster server you started.