Ubuntu: Unintsallation Ubuntu



Question:

I am new to Ubuntu. i have installed it using windows Ubuntu installer. at first it worked well.but i have committed mistake while working in Quantum espresso software,Linux is required plat form for it. this mistake erased my Ubuntu. while i restart my pc there are two OS option to select one is windows and another one is Ubuntu. when i tried to boot Ubuntu it shows that Ubuntu is erased. so i installed Ubuntu once more.but now problem is when i restart pc it shows three OS list now these are one windows and two Ubuntu and i can boot both the Ubuntu.

so my question is how to erase old all Ubuntu and install new one

please help in this reg.,
thank you


Solution:1

  1. Open the Terminal program
  2. Enter the command sudo update-grub (which will ask for your login password)

This should regenerate the menu configuration file of grub bootloader, and remove the duplicate entry.


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