Error Establishing Database Connection

So, I got an error recently where, when I tried getting into my site it would show an error which looks like this

So I ventured into google and came across this blog post:

Digital Ocean: Error Establishing Database Connection

In particular, this Champion’s comment. Which was the error I had.

Unfortunately, trying to start in this way resulted in another error.

 

So more Google:

Ask Ubuntu: MySQL Start Error

In particular this potion:

Got my problem fixed real quick, and now my site is running again, YAY!