Troubleshoot a PostgreSQL "Could not connect to server" Error

Learn how to troubleshoot one of the most common PostgreSQL errors, "Could not connect to server." There are several different variations of this error. [...]  

Solve the PostgreSQL Error "psql: FATAL: database "root" does not exist"

Learn how to solve the common PostgreSQL error psql: FATAL: database "root" does not exist." New PostgreSQL users often encounter this error when first logging in to PostgreSQL. [...]  

Install and Use PostgreSQL

PostgreSQL is a powerful object-relational database system. It features robust functionality, and supports a large number of concurrent transactions, which makes it an excellent choice for large and/or high-demand database applications. This tutorial will cover how to install and run PosgreSQL, and an introduction to some of the basic commands. [...]