install ubuntu

1. after install ubuntu, I can’t get start with a choose of windows any more. it just get into ubuntu directly.

solve method:
start ubuntu, using ctrl+alt+T to open terminal , and using this command to edit setting file:

sudo gedit /etc/default/grub
and fix GRUB_TIMEOUT=”10” ——（本来没有引号）

first time this method make effect,but secnd time,it can’t,you can using:
使用sudo update-grub2修复
如果出现
grub.cfg …
…此处省略n行
Found Windows 7 (loader) on /dev/sda1
done
表明修复完成，重启在grub选项菜单选择引导win7

2.http://blog.csdn.net/simongeek/article/details/22606943
when I try to install git, there is a problem

1. install ssh
   http://jingyan.baidu.com/article/0eb457e52e50ad03f1a90518.html

4.install jdk