An interesting PDF, is Ubuntu Server Guide: For Ubuntu 10.04: https://help.ubuntu.com/10.04/serverguide/C/serverguide.pdf For Ubuntu 10.10: https://help.ubuntu.com/10.10/serverguide/C/serverguide.pdf For Ubuntu 11.04: https://help.ubuntu.com/11.04/serverguide/C/serverguide.pdf