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5. Choosing a kernel

At this point you have a complete compressed root filesystem. The next step is to build or select a kernel. In most cases it would be possible to copy your current kernel and boot the diskette from that. However, there may be cases where you wish to build a separate one. .:: 6giay.vn ::.

One reason is size. If you are building a single boot/root diskette, the kernel will be one of the largest files on the diskette so you will have to reduce the size of the kernel as much as possible. To reduce kernel size, build it with the minumum set of facilities necessary to support the desired system. This means leaving out everything you don't need. Networking is a good thing to leave out, as well as support for any disk drives and other devices which you don't need when running your boot/root system. As stated before, your kernel [Elasticsearch Community] .:: pad.public.cat ::. [Cloud computing Community] must have ramdisk and ext2 support built into it.

Having worked out a minimum set of facilities to include in a kernel, you then need to work out what to add back in. Probably the most common uses for a boot/root diskette system would be to examine and restore a corrupted root file system, and to do this you may need kernel support. For example, if your backups are all held on tape using Ftape to access your tape drive, then, if you lose your current root drive and drives containing Ftape, then you will not be able to restore from your backup tapes. You will have to reinstall Linux, download and reinstall ftape, and then try to read your backups.

The point here is that, whatever I/O support you have added to your kernel to support backups should also be added into your boot/root kernel.

The procedure for actually building the kernel is described in the documentation that comes with the kernel. It is quite easy to follow, so start by looking in .:: groups.google.com ::. /usr/src/linux. If you have trouble building a kernel, you should probably not attempt to build boot/root systems anyway. Remember to compress the kernel with `` .:: mindef.gov.bn ::. make zImage''.

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