Launching the Configuration Tool

sudo raspi-config

 

Closing X windows after it auto started

You can use CTRL + ALT + F1

Performance Tuning

If you are not using the HDMI out and want maximum performance from the RPi because you are using memory intensive processes such as Apache, MySQL, etc then it is sensible to reduce the amount memory given to the RPi graphics (Advanced > Memory Split > GPU) to say 16MB using the config tool.