Mac OS X 10.8.2 terminal switch Root User

Method 1:
1. Enable Terminal
2. jonesduan-MacBook-Pro :~ User $Sudo-I
3. Enter the root password.

Method 2:
It is the same as step 1 and Step 3 in method 1, but the command entered in step 2 is notSudo-IInsteadSudo SuOrSu.

Differences:
The difference between method 1 and method 2 is that the terminal displays different results after obtaining the root permission.

Method 1 is as follows:
Jonesduan-MacBook-Pro :~ Root #

The second method is as follows:
Sh-3.2 #

Why is it like this? What is the specific meaning? I don't quite understand it. Please contact us! Pai_^
However, I prefer the former.

Refer:
Forget the root password on Mac. For more information, see
Http://blog.csdn.net/xuefeng1009/article/details/7421804

For more information about enabling and disabling root users in MAC, see
Http://shlei.iteye.com/blog/855336