Ubuntu Grub Loading Error

We have two os .eg:windows and ubuntu.
The grub loading part is done by Ubuntu os.
Whenever we get the grub error 22,we can do these commands.
Firstly,we insert the ubuntu disk and type "boot"command.
Then the disk is booting up.
When we get the desktop,we take the terminal window and type the following commands...


sudo grub ... enter
geometry (hd0)... enter
Here we just understand the number of ext3 file system.
root(hd0,number) (Here the number of the ext3) ... enter
setup (hd0) ... enter

succeeded..


If we get succeeded message the grub error is removed.


This commands are useful in the several type of grub errors.....
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