简单定制linux系统

file initrd-2.6.18-398.el5.img  
initrd-2.6.18-398.el5.img: gzip compressed data, from Unix, last modified: Wed Jul 20 15:23:58 2011, max compression

cp /boot/initrd-2.6.18-398.el5.img /～/initrd-2.6.18-164.el5.img.gz
cd
gunzip initrd-2.6.18-164.el5.img.gz

zcat  /boot/initrd-2.6.18-398.el5.img | cpio -id

file initrd-2.6.18-164.el5.img  
initrd-2.6.18-164.el5.img: ASCII cpio archive (SVR4 with no CRC)
mkdir test
cd !$

cpio -id < initrd-2.6.18-164.el5.img

vim init
找到
mkrootdev -t ext3 -o defaults,ro /dev/vol0/root
改为
mkrootdev -t ext3 -o defaults,ro /dev/sda3

find . | cpio -H newc -o --quiet | gzip -9 > /mnt/boot/initrd.gz

cp /sbin/init /mnt/sysroot/sbin/

ldd /sbin/init
	linux-vdso.so.1 =>  (0x00007fff3adc4000)
	libsepol.so.1 => /lib64/libsepol.so.1 (0x0000003f67a00000)
	libselinux.so.1 => /lib64/libselinux.so.1 (0x0000003f67600000)
	libc.so.6 => /lib64/libc.so.6 (0x0000003f5f800000)
	libdl.so.2 => /lib64/libdl.so.2 (0x0000003f60000000)
	/lib64/ld-linux-x86-64.so.2 (0x0000003f5f400000)

#!/bin/bash
#
dst=/mnt/sysroot
libcp(){
    lib_path=${1%/*}
    [ ! -d $dst$lib_path ] && mkdir -p $dst$lib_path
    [ ! -e $dst$1 ] && cp $1 $dst$lib_path && echo "copy $1 finished."
}
bincp(){
    cmd_path=${1%/*}
    [ ! -d $dst$cmd_path ] && mkdir -p $dst$cmd_path
    [ ! -e $dst$1 ] && cp $1 $dst$cmd_path
    for lib in `ldd $1 | grep -o "/.*lib\(64\)\{0,1\}/[^[:space:]]\{1,\}"`; do
        libcp $lib
    done
}
read -p "Enter the command that you want to copy: " user_cmd
until [ $user_cmd == "q" ]; do
    ! which $user_cmd  && echo -e "\e[31;5m\tWrong Command!\e[0m" && read -p "Enter the command that you want to copy: " user_cmd && continue
    cmd_real_path=`which $user_cmd | grep -v "^alias" | grep -o "[^[:space:]]\{1,\}"`
    bincp $cmd_real_path
    echo "Command $user_cmd copy finished."
    echo -e "\e[32m##########################################################\e[0m"
    read -p "Enter the command that you want to copy: " user_cmd
done