23TechniqueTaking Good Care of Your KernelThe kernel is (Web hosting service)
23TechniqueTaking Good Care of Your KernelThe kernel is the software core of your computer. Kernel modulesmake up the software interface between your system hardware andthe system software. On a fresh Linux installation, over 900 kernelmodules are ready to load into your kernel. The actual number may varydepending on the specific hardware that Linux finds when it sets uphousekeeping, but on our Fedora system, 968 modules exist. You can also download and install new kernel modules. You can findmany open-source modules bouncing around the Web that do everythingfrom silencing annoying beeps to enabling wireless network cards. Thebeauty of the system is the flexibility that kernel modules provide thecomputer industry. Every time a new piece of hardware is invented, youdon t have to modify and rebuild the Linux kernel you just add a newmodule. Manipulating kernel modules is quick and simple, thanks to a series ofcommands that work at the command line to update your kernel withouta complete rebuild. You can also find-tune your kernel by using the boottime parameters. Boot time parameters are the kernel options that areenforced every time you boot your system. Not all features are modules, and you may want your kernel to be config- ured so that some features can t be changed. If that is the case, a com- plete kernel rebuild is called for (see Technique 24 for information aboutbuilding a kernel from scratch). If you can get by with a simple patch tothe kernel, this is the technique for you. In this technique, we introduceyou to the commands that let you customize your kernel quickly andeasily. Save Time By Manipulating your kernelon the fly Using your boot timeparameters to custom- tailor your kernel29_
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