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03_build_disk.sh
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03_build_disk.sh
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#!/bin/sh
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red='\e[0;41m' # 红色
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RED='\e[1;31m'
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green='\e[0;32m' # 绿色
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GREEN='\e[1;32m'
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yellow='\e[5;43m' # 黄色
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YELLOW='\e[1;33m'
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blue='\e[0;34m' # 蓝色
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BLUE='\e[1;34m'
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purple='\e[0;35m' # 紫色
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PURPLE='\e[1;35m'
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cyan='\e[4;36m' # 蓝绿色
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CYAN='\e[1;36m'
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WHITE='\e[1;37m' # 白色
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NC='\e[0m' # 没有颜色
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#----------------------------------------------
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#
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# 制作磁盘
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#
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#----------------------------------------------
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# 创建磁盘 64M
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dd if=/dev/zero of=disk.img bs=1M count=64
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# 对磁盘进行分区一个主分区
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fdisk disk.img << EOF
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n
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p
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w
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EOF
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echo ".........................................................."
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# 磁盘镜像挂载到具体设备
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loop_dev=$(losetup -f)
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# fdisk -l disk.img 查看 start 为 2048, unit 512 所以 -o 偏移扇区 1048576 = 2048 x 512
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losetup -o 1048576 ${loop_dev} disk.img
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# 对磁盘进行格式化
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mkfs.ext3 ${loop_dev}
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diskfs="diskfs"
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# 挂载磁盘到本地目录
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mkdir -pv ${diskfs}
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mount -t ext3 ${loop_dev} ${diskfs}
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# 安装grub 引导
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grub-install --boot-directory=${diskfs}/boot/ --target=i386-pc --modules=part_msdos disk.img
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#---------------------------------------------
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#
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# 制作内核和 rootfs
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#
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#---------------------------------------------
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mkdir -pv rootfs
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mkdir -pv rootfs/dev
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mkdir -pv rootfs/etc
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mkdir -pv rootfs/sys
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mkdir -pv rootfs/mnt
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mkdir -pv rootfs/tmp
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mkdir -pv rootfs/lib
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mkdir -pv rootfs/sbin
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mkdir -pv rootfs/proc
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mkdir -pv rootfs/root
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mkdir -pv rootfs/lib64
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mkdir -pv rootfs/lib/modules
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# 拷贝内核镜像
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cp work/linux-4.14.9/arch/x86_64/boot/bzImage ../${diskfs}/boot/bzImage
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# 拷贝 busybox 到 rootfs
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echo "${CYAN}开始制作rootfs...${NC}"
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cp work/busybox-1.34.1/_install/* ../rootfs/ -r
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#-----------------------------------------------
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#
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# 制作启动文件系统 initramfs
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#
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#-----------------------------------------------
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cd rootfs
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# 这种方法也可以 mkinitramfs -k -o ./${diskfs}/boot/initrd 4.14.9
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# 利用 Busybox 采用脚本制作 init 脚本 https://blog.csdn.net/embeddedman/article/details/7721926
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make_init() {
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cat<<"EOF">init
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#!/bin/sh
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# 必须首先挂载，否则 mdev 不能正常工作
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mount -t sysfs none /sys
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mount -t proc none /proc
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mount -t devtmpfs none /dev
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mount -t tmpfs none /tmp -o mode=1777
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# 必须挂载一下，否则下面的 mount 不上
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mdev -s
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mount -t ext3 /dev/sda1 /mnt
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# 关闭内核烦人的输出信息
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echo 0 > /proc/sys/kernel/printk
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echo -e "\n\e[0;32mBoot took $(cut -d' ' -f1 /proc/uptime) seconds\e[0m"
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mkdir -p /dev/pts
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mount -t devpts none /dev/pts
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# 切换之前，修改 mount 路径
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mount --move /dev /mnt/dev
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mount --move /sys /mnt/sys
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mount --move /proc /mnt/proc
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mount --move /tmp /mnt/tmp
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# 切换到真正的磁盘系统上 rootfs(initramfs) ---> diskfs
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exec switch_root /mnt /sbin/init
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EOF
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# /sbin/init [switch_root 执行] ---> /etc/inittab [定义了启动顺序] --->
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# /etc/init.d/rcS [系统 mount, 安装驱动，配置网络] --->
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# /etc/init.d/rc.local [文件配置应用程序需要的环境变量] --->
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# /etc/profile [部分初始化]
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chmod +x init
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}
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make_init
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# 下面这些不用了，利用脚本里面的 busybox 的 mdev -s 自动挂载
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# mknod -m 644 dev/tty0 c 4 1
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# mknod -m 644 dev/tty c 5 0
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# mknod -m 600 dev/console c 5 1
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# mknod -m 644 dev/null c 1 3
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# mknod -m 640 dev/sda1 b 8 1
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# 指定了利用 /etc/init.d/rcS 启动
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cat<<"EOF">etc/inittab
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::sysinit:echo "sysinit 1++++++++++++++++++++++++++++++++++++++"
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::sysinit:/etc/init.d/rcS
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::sysinit:echo "sysinit 2++++++++++++++++++++++++++++++++++++++"
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::restart:/sbin/init
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::ctrlaltdel:/sbin/reboot
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::shutdown:/bin/umount -a -r
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tty1::once:echo "hello smart-os tty1"
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tty1::respawn:/bin/sh
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tty2::once:echo "hello smart-os tty2"
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tty2::respawn:/bin/sh
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tty3::once:echo "hello smart-os tty3"
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tty3::respawn:/bin/sh
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EOF
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# dns 测试
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# 0. 启动脚本 run_nat.sh
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# 1. busybox 必须动态编译
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# 2. ifconfig eth0 192.168.100.6 && ifconfig eth0 up
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# 3. route add default gw 192.168.100.1
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# 4. echo "nameserver 114.114.114.114" >> /etc/resolv.conf
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cp -rf ../fixed/lib* lib/ && cp ../fixed/ld-linux-x86-64.so.2 lib64/
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find . | cpio -R root:root -H newc -o | gzip -9 > ../${diskfs}/boot/initrd
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echo "${GREEN}rootfs制作成功!!!${NC}"
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echo ".........................................................."
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cd ..
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#--------------------------------------------------------------
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#
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# 生成磁盘文件系统(利用 busybox 结构，省的自己创建了)
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#
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#--------------------------------------------------------------
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echo "${CYAN}开始制作diskfs...${NC}"
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cp rootfs/* ${diskfs} -r
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rm -rf ${diskfs}/init && rm -rf ${diskfs}/linuxrc && rm -rf ${diskfs}/lost+found
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# 我们测试驱动, 制作的镜像启动后，我们进入此目录 insmod hello_world.ko 即可
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./make_driver.sh $(pwd)/${diskfs}/lib/modules
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# 编译网卡驱动 ( 目前版本内核已集成 e1000 )
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# cd work/linux-4.14.9 && make M=drivers/net/ethernet/intel/e1000/ && cd ../..
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# 生成 grub.cfg 文件
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cat - > ${diskfs}/boot/grub/grub.cfg << EOF
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set timeout=6
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menuentry "smart-os" {
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root=(hd0,msdos1)
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linux /boot/bzImage console=tty0
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initrd /boot/initrd
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}
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EOF
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# 生成 rcS 文件
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title=$(cat<<EOF
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\e[0;36m
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..######..##.....##....###....########..########..........#######...######.
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.##....##.###...###...##.##...##.....##....##............##.....##.##....##
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.##.......####.####..##...##..##.....##....##............##.....##.##......
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..######..##.###.##.##.....##.########.....##....#######.##.....##..######.
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.......##.##.....##.#########.##...##......##............##.....##.......##
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.##....##.##.....##.##.....##.##....##.....##............##.....##.##....##
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..######..##.....##.##.....##.##.....##....##.............#######...######.
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\e[0m
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EOF
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)
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mkdir -pv ${diskfs}/etc/init.d
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cat - > ${diskfs}/etc/init.d/rcS << EOF
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#!/bin/sh
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echo -e "\n“${title}”\n"
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# 测试驱动加载
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cd /lib/modules && insmod hello_world.ko
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# dns 测试
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ifconfig eth0 192.168.100.6 && ifconfig eth0 up
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route add default gw 192.168.100.1
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echo "nameserver 114.114.114.114" >> /etc/resolv.conf
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# exec 执行 /etc/init.d/rc.local 脚本
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EOF
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chmod +x ${diskfs}/etc/init.d/rcS
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cat -> ${diskfs}/rtmpd.sh << EOF
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wget http://www.qiyicc.com/download/rtmpd.zip
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unzip rtmpd.zip
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rm rtmpd.zip -rf
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cd rtmpd
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mv smart_rtmp/smart_rtmpd.multithread.centos* ./
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tar zxvf *.tar.gz
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rm *.tar.gz -rf
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rm smart_rtmp -rf
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EOF
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chmod +x ${diskfs}/rtmpd.sh
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echo "${GREEN}diskfs制作成功!!!${NC}"
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echo ".........................................................."
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# 卸载映射
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umount ${loop_dev}
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losetup -d ${loop_dev}
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