Previously I've had the LiteSpeed web server installed. So it's time for me to add MySQL and later on CouchDB.
First we install the server and client package with:
sudo apt-get install mysql-server mysql-client
During the installation you'll get a prompt to fill in a password for the mysql root user. Just enter a password or not. It's up to you.
In the old days, you had to create a password for the root user yourself after the installation.
MySQL will start after the installation is finished.
You can check this with