Kernelのアップグレードとメンテナンス

[root@localhost ~]# ls -l /usr/src/redhat/
合計 40
drwxr-xr-x 2 root root 4096  3月 15  2007 BUILD
drwxr-xr-x 8 root root 4096 10月  5 04:01 RPMS
drwxr-xr-x 2 root root 4096 10月 14 05:25 SOURCES
drwxr-xr-x 2 root root 4096 10月 14 05:25 SPECS
drwxr-xr-x 2 root root 4096  3月 15  2007 SRPMS
[root@localhost ~]# ls -l /usr/src/kernels/
合計 8
drwxr-xr-x 18 root root 4096 10月  5 04:03 2.6.18-8.el5-i686

[root@localhost ~]# yum update kernel
Loading "installonlyn" plugin
Setting up Update Process
Setting up repositories
base                      100% |=========================| 1.1 kB    00:00
updates                   100% |=========================|  951 B    00:00
addons                    100% |=========================|  951 B    00:00
extras                    100% |=========================| 1.1 kB    00:00
Reading repository metadata in from local files
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Downloading header for kernel to pack into transaction set.
kernel-2.6.18-8.1.14.el5. 100% |=========================| 205 kB    00:00
---> Package kernel.i686 0:2.6.18-8.1.14.el5 set to be installed
--> Running transaction check

Dependencies Resolved

=============================================================================
 Package                 Arch       Version          Repository        Size
=============================================================================
Installing:
 kernel                  i686       2.6.18-8.1.14.el5  updates            12 M

Transaction Summary
=============================================================================
Install      1 Package(s)
Update       0 Package(s)
Remove       0 Package(s)

Total download size: 12 M
Is this ok [y/N]: y
Downloading Packages:
(1/1): kernel-2.6.18-8.1. 100% |=========================|  12 MB    00:02
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing: kernel                       ######################### [1/1]

Installed: kernel.i686 0:2.6.18-8.1.14.el5
Complete!
[root@localhost ~]# ls -l /usr/src/kernels/
合計 8
drwxr-xr-x 18 root root 4096 10月  5 04:03 2.6.18-8.el5-i686
[root@localhost ~]# cat /boot/grub/grub.conf
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /boot/, eg.
#          root (hd0,0)
#          kernel /vmlinuz-version ro root=/dev/hda2
#          initrd /initrd-version.img
#boot=/dev/hda
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.18-8.1.14.el5)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-8.1.14.el5 ro root=LABEL=/ rhgb quiet
        initrd /initrd-2.6.18-8.1.14.el5.img
title CentOS (2.6.18-8.el5)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-8.el5 ro root=LABEL=/ rhgb quiet
        initrd /initrd-2.6.18-8.el5.img
[root@localhost ~]# ls -l /usr/src/kernels/
合計 8
drwxr-xr-x 18 root root 4096 10月  5 04:03 2.6.18-8.el5-i686
[root@localhost ~]#
[root@localhost 2.6.18-8.el5-i686]# make menuconfig
  HOSTCC  scripts/basic/fixdep
  HOSTCC  scripts/basic/docproc
  HOSTCC  scripts/kconfig/conf.o
  HOSTCC  scripts/kconfig/kxgettext.o
  HOSTCC  scripts/kconfig/mconf.o
  HOSTCC  scripts/kconfig/zconf.tab.o
  HOSTLD  scripts/kconfig/mconf
  HOSTCC  scripts/kconfig/lxdialog/checklist.o
  HOSTCC  scripts/kconfig/lxdialog/inputbox.o
  HOSTCC  scripts/kconfig/lxdialog/lxdialog.o
  HOSTCC  scripts/kconfig/lxdialog/menubox.o
  HOSTCC  scripts/kconfig/lxdialog/msgbox.o
  HOSTCC  scripts/kconfig/lxdialog/textbox.o
  HOSTCC  scripts/kconfig/lxdialog/util.o
  HOSTCC  scripts/kconfig/lxdialog/yesno.o
  HOSTLD  scripts/kconfig/lxdialog/lxdialog
  scripts/kconfig/mconf arch/i386/Kconfig

関連コマンド：
make config
make menuconfig
make xconfig
make dep
make clean
make bzImage
make zImage
make modules
make modules_install
modinfo
modprobe
rmmod
※make modules_installでカーネルモジュールをインストールする先。

[root@localhost ~]# ls -l /lib/modules/カーネルバージョン/
合計 16
drwxr-xr-x 6 root root 4096 10月 14 22:52 2.6.18-8.1.14.el5
drwxr-xr-x 6 root root 4096 10月  5 03:54 2.6.18-8.el5
[root@localhost ~]#

[root@localhost ~]# ls -l /lib/modules/2.6.18-8.1.14.el5/
合計 1120
lrwxrwxrwx 1 root root     47 10月 14 22:51 build -> ../../../usr/src/kernels/2.6.18-8.1.14.el5-i686
drwxr-xr-x 2 root root   4096  9月 28 08:41 extra
drwxr-xr-x 9 root root   4096 10月 14 22:51 kernel
-rw-r--r-- 1 root root 236055 10月 14 22:52 modules.alias
-rw-r--r-- 1 root root     69 10月 14 22:52 modules.ccwmap
-rw-r--r-- 1 root root 195218 10月 14 22:52 modules.dep
-rw-r--r-- 1 root root     73 10月 14 22:52 modules.ieee1394map
-rw-r--r-- 1 root root    375 10月 14 22:52 modules.inputmap
-rw-r--r-- 1 root root   2160 10月 14 22:52 modules.isapnpmap
-rw-r--r-- 1 root root     74 10月 14 22:52 modules.ofmap
-rw-r--r-- 1 root root 164718 10月 14 22:52 modules.pcimap
-rw-r--r-- 1 root root    589 10月 14 22:52 modules.seriomap
-rw-r--r-- 1 root root  91187 10月 14 22:52 modules.symbols
-rw-r--r-- 1 root root 319111 10月 14 22:52 modules.usbmap
lrwxrwxrwx 1 root root      5 10月 14 22:51 source -> build
drwxr-xr-x 2 root root   4096  9月 28 08:41 updates
drwxr-xr-x 2 root root   4096  9月 28 08:41 weak-updates
[root@localhost ~]#

※Can't find modulesというエラーになった場合,make modules_installを
行っているか確認。（/lib/modules/カーネルバージョン/以下)にインストールする。
※ディストリブーションによってパスも変わるので,注意。

━━━━━━━ カーネル.configファイルの設定━━━━━━━━

[root@localhost 2.6.18-8.el5-i686]# pwd
/usr/src/kernels/2.6.18-8.el5-i686
[root@localhost 2.6.18-8.el5-i686]# head .config
#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.18-8.el5
# Thu Mar 15 19:51:27 2007
#
CONFIG_X86_32=y
CONFIG_GENERIC_TIME=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_SEMAPHORE_SLEEPERS=y
[root@localhost 2.6.18-8.el5-i686]#