Section 5.2. Installing by Hand


5.2. Installing by Hand

If your distribution does not have a installkernel command, or you wish to just do the work by hand to understand the steps involved, here they are:

The modules must be installed:

 # make modules_install 

The static kernel image must be copied into the /boot directory. For an i386-based kernel, do the following:

 # make kernelversion 2.6.17.11 

Note that the kernel version will probably be different for your kernel. Use this value in place of the text KERNEL_VERSION in the following steps:

 # cp arch/i386/boot/bzImage /boot/bzImage-KERNEL_VERSION # cp System.map /boot/System.map-KERNEL_VERSION 

Modify the bootloader so it knows about the new kernel. This involves editing a configuration file for the bootloader you use, and is covered later in "Modifying the Bootloader for the New Kernel" for the GRUB and LILO bootloaders.

If the boot process does not work properly, it's usually because an initial ramdisk image is needed. To create this properly, use the steps in the beginning of this chapter for installing a kernel automatically, because the distribution install scripts know how to properly create the ramdisk using the needed scripts and tools. Because each distribution does this differently, it is beyond the scope of this book to cover all of the different methods of building the ramdisk image.

Here is a handy script that can be used to install the kernel automatically instead of having to type the previous commands all the time:

 #!/bin/sh # # installs a kernel # make modules_install # find out what kernel version this is for TAG in VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION ; do     eval `sed -ne "/^$TAG/s/ //gp" Makefile` done SRC_RELEASE=$VERSION.$PATCHLEVEL.$SUBLEVEL$EXTRAVERSION # figure out the architecture ARCH=`grep "CONFIG_ARCH " include/linux/autoconf.h | cut -f 2 -d "\""` # copy the kernel image cp arch/$ARCH/boot/bzImage /boot/bzImage-"$SRC_RELEASE" # copy the System.map file cp System.map /boot/System.map-"$SRC_RELEASE" echo "Installed $SRC_RELEASE for $ARCH" 



Linux Kernel in a Nutshell
Linux Kernel in a Nutshell (In a Nutshell (OReilly))
ISBN: 0596100795
EAN: 2147483647
Year: 2004
Pages: 113

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