LinuxWorld: Booting without all the extras, Part 2 - More fun with run levelsAug 31, 2000, 23:35 (0 Talkback[s])
(Other stories by Joshua Drake)
"My previous article covered how to add and remove services from various run levels within the Red Hat distribution of Linux. In this installment of Ask the Geek, I will talk about what these services do and how to decide whether or not you need them. I'll also introduce the new Ask the Geek discussion."
"As noted in the previous article on chkconfig with Linux you can enable or disable certain services. You can also modify the run level in which a given service will start. For example, if you don't need a service during normal startup, but you do want it when you disconnect your laptop from its power supply, you can set the service to start at run level 4. When you are ready to use the service, just switch levels with the init command. The question still remains, though, as to what services should and should not be started."
"This is particularly important with Red Hat Linux, because Red Hat starts all services by default. This is a bad way of doing things; it takes up resources and can pose a security risk for those who don't know how to lock down a Linux machine."