LinuC（Linux技術者認定資格）＆リナックスサーバ構築設定事例

[root@A]# uname -a
Linux sentos5.localdomain 2.6.18-128.el5 #1 SMP Wed Jan 21 10:44:23 EST 2009 i686 i686 i386 GNU/Linux

[root@A]# uname -r
2.6.18-128.el5

[root@A]# uname -m
i686

[root@A]# cat /proc/version
Linux version 2.6.18-128.el5 (mockbuild@builder16.centos.org) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-44)) #1 SMP Wed Jan 21 10:44:23 EST 2009

[root@A]# head -4 /usr/src/linux/Makefile
VERSION = 2
PATCHLEVEL = 6
SUBLEVEL =18
EXTRAVERSION = -128.el5

[root@A]# ls /boot/vmlinuz*
/boot/vmlinuz-2.6.18-128.el5

[root@A]# ls -ld /lib/modules/2.6.18-128.el5/kernel/*
drwxr-xr-x  3 root root 4096    羇  2010 /lib/modules/2.6.18-128.el5/kernel/arch
drwxr-xr-x 39 root root 4096    羇  2010 /lib/modules/2.6.18-128.el5/kernel/drivers
drwxr-xr-x 30 root root 4096    羇  2010 /lib/modules/2.6.18-128.el5/kernel/fs
drwxr-xr-x  2 root root 4096    羇  2010 /lib/modules/2.6.18-128.el5/kernel/kernel
drwxr-xr-x  4 root root 4096    羇  2010 /lib/modules/2.6.18-128.el5/kernel/lib
drwxr-xr-x 21 root root 4096    羇  2010 /lib/modules/2.6.18-128.el5/kernel/net

[root@A]# lsmod
Module                  Size  Used by
nfsd                  202097  17
exportfs                9665  1 nfsd
lockd                  61257  2 nfsd
nfs_acl                 7617  1 nfsd

[root@A]# cat /proc/modules
nfsd 202097 17 - Live 0xe0c3a000
exportfs 9665 1 nfsd, Live 0xe0b72000
lockd 61257 2 nfsd, Live 0xe0bf7000
nfs_acl 7617 1 nfsd, Live 0xe0b6f000
auth_rpcgss 43105 1 nfsd, Live 0xe0bd7000

[root@A]# modinfo ext3
filename:       /lib/modules/2.6.18-128.el5/kernel/fs/ext3/ext3.ko
license:        GPL
description:    Second Extended Filesystem with journaling extensions
author:         Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others

[root@A]# modinfo -n ext3
/lib/modules/2.6.18-128.el5/kernel/fs/ext3/ext3.ko

[root@A]# modinfo -l ext3
GPL

[root@A]# modinfo -d ext3
Second Extended Filesystem with journaling extensions

[root@A]# modinfo -a ext3
Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others

[root@A]# insmod /lib/modules/2.6.18-128.el5/kernel/fs/ext2/ext2.ko

[root@A]# modprobe -c
alias scsi_hostadapter mptbase
alias scsi_hostadapter1 mptspi
alias scsi_hostadapter2 ata_piix
alias eth0 pcnet32

[root@A]# modprobe -lt fs
/lib/modules/2.6.18-128.el5/kernel/fs/autofs4/autofs4.ko
/lib/modules/2.6.18-128.el5/kernel/fs/cachefiles/cachefiles.ko
/lib/modules/2.6.18-128.el5/kernel/fs/cifs/cifs.ko

[root@A]# modprobe --show-depends ext3
insmod /lib/modules/2.6.18-128.el5/kernel/fs/jbd/jbd.ko
insmod /lib/modules/2.6.18-128.el5/kernel/fs/ext3/ext3.ko

[root@A]# ls /lib/modules/2.6.18-128.el5/modules.dep
/lib/modules/2.6.18-128.el5/modules.dep

[root@A]# cat /etc/modprobe.conf
alias scsi_hostadapter mptbase
alias scsi_hostadapter1 mptspi
alias scsi_hostadapter2 ata_piix
alias eth0 pcnet32

[root@A]# ls -l /etc/modprobe.d/*
-rw-r--r-- 1 root root  810    羚  2009 /etc/modprobe.d/blacklist
-rw-r--r-- 1 root root   83   羃2  2009 /etc/modprobe.d/blacklist-firewire
-rw-r--r-- 1 root root 6111   羃1  2009 /etc/modprobe.d/modprobe.conf.dist

[root@A]# cat /etc/modprobe.d/modprobe.conf.dist
alias usb-uhci uhci-hcd
alias usb-ohci ohci-hcd
install scsi_hostadapter /bin/true
install usbmouse /sbin/modprobe --first-time --ignore-install usbmouse && { /sbin/modprobe hid; /bin/true; }
remove usbmouse { /sbin/modprobe -r hid; } ; /sbin/modprobe -r --first-time --ignore-remove usbmouse
remove nfsd { /bin/umount /proc/fs/nfsd > /dev/null 2>&1 || :; } ; /sbin/modprobe -r --first-time --ignore-remove nfsd

[root@A]# ls -ld /proc/sys/kernel/*
-rw-r--r-- 1 root root 0    羌 17:26 /proc/sys/kernel/ctrl-alt-del
-rw-r--r-- 1 root root 0    羌 17:26 /proc/sys/kernel/domainname
-rw-r--r-- 1 root root 0    羌 17:26 /proc/sys/kernel/hostname
-rw-r--r-- 1 root root 0    羌 17:26 /proc/sys/kernel/hotplug
-rw-r--r-- 1 root root 0    羌 17:26 /proc/sys/kernel/modprobe
-r--r--r-- 1 root root 0    羌 17:26 /proc/sys/kernel/osrelease
-r--r--r-- 1 root root 0    羌 17:26 /proc/sys/kernel/ostype
-rw-r--r-- 1 root root 0    羌 17:26 /proc/sys/kernel/sem
-rw-r--r-- 1 root root 0    羌 17:26 /proc/sys/kernel/shmall
-rw-r--r-- 1 root root 0    羌 17:26 /proc/sys/kernel/shmmax
-rw-r--r-- 1 root root 0    羌 17:26 /proc/sys/kernel/shmmni
-rw-r--r-- 1 root root 0    羌 17:26 /proc/sys/kernel/sysrq
-r--r--r-- 1 root root 0    羌 17:26 /proc/sys/kernel/tainted
-rw-r--r-- 1 root root 0    羌 17:26 /proc/sys/kernel/threads-max

[root@A]# ls -ld /proc/sys/fs/*
-rw-r--r-- 1 root root 0    羌 17:29 /proc/sys/fs/file-max
-r--r--r-- 1 root root 0    羌 17:29 /proc/sys/fs/file-nr

[root@A]# ls -ld /proc/sys/net/*
dr-xr-xr-x 6 root root 0    羌 17:30 /proc/sys/net/ipv4
dr-xr-xr-x 6 root root 0    羌 17:30 /proc/sys/net/ipv6

[root@A]# ls -ld /proc/sys/net/ipv4/*
-rw-r--r-- 1 root root 0    羌 17:31 /proc/sys/net/ipv4/ip_forward
-rw-r--r-- 1 root root 0    羌 17:31 /proc/sys/net/ipv4/icmp_echo_ignore_all
-rw-r--r-- 1 root root 0    羌 17:31 /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts

[root@A]# cat /etc/sysctl.conf
net.ipv4.ip_forward = 0

[root@A]# cat /etc/rc.local
net.ipv4.ip_forward = 0

[root@A]# sysctl net.ipv4.ip_forward
net.ipv4.ip_forward = 0

[root@A]# sysctl -w net.ipv4.ip_forward=1
net.ipv4.ip_forward = 1

[root@A]# sysctl -a
sunrpc.max_resvport = 1023
sunrpc.min_resvport = 665
sunrpc.tcp_slot_table_entries = 16