1.1 从网络下载ubuntu-12.10-desktop-i386.iso，ubuntu-11.10-desktop-i386.iso
1.2 使用ultraISO将ubuntu-12.10-desktop-i386.iso刻录到U盘
1.3 启动笔记本，F12进入BIOS，设置笔记本从U盘引导启动
1.4 按步骤安装ubuntu-12.10，选择安装第三方软件和库选项
1.5 进入系统后，Dash->language support 安装中文语言
1.6 Dash->Terminal打开终端，系统栏右键lock to Launcher
1.7 更新安装源，参见：https://blog.csdn.net/LIN_085/article/details/80509390
1.8 sudo apt-get install virtualbox
1.9 Dash->virtualbox打开，在其中安装ubuntu-11.10-desktop-i386.iso
1.9.1 分区信息如下：
/dev/sda1 ext4 /
/dev/sda2 ext4
1.9.2 用户账户页面勾选自动登录
1.9.3 sudo passwd root，设置root密码为一个空格, su - root
1.9.4 挂载实验分区
mkdir /vita
mount /dev/sda2 /vita
/etc/fstab:加入如下行，开机自动挂载
/dev/sda2 /vita ext4 defaults 0 0
1.9.5 change /etc/apt/sources.list to below
deb http://old-releases.ubuntu.com/ubuntu/ oneiric main universe restricted multiverse
deb-src http://old-releases.ubuntu.com/ubuntu/ oneiric main universe restricted multiverse
deb http://old-releases.ubuntu.com/ubuntu/ oneiric-security universe main multiverse restricted
deb-src http://old-releases.ubuntu.com/ubuntu/ oneiric-security universe main multiverse restricted
deb http://old-releases.ubuntu.com/ubuntu/ oneiric-updates universe main multiverse restricted
deb http://old-releases.ubuntu.com/ubuntu/ oneiric-proposed universe main multiverse restricted
deb-src http://old-releases.ubuntu.com/ubuntu/ oneiric-proposed universe main multiverse restricted
deb http://old-releases.ubuntu.com/ubuntu/ oneiric-backports universe main multiverse restricted
deb-src http://old-releases.ubuntu.com/ubuntu/ oneiric-backports universe main multiverse restricted
deb-src http://old-releases.ubuntu.com/ubuntu/ oneiric-updates universe main multiverse restricted
1.9.6 apt-get update
1.9.7 apt-get install openssh-server
1.9.8 set network mode to Bridge in virtualbox
1.10 we can use ssh in host machine: