I am new to linux, and want to learn it. The Ubuntu installation was smooth after which i was prompted to reboot the PC which I did and the unpacking of additional packages that were already copied to my HDD started. In the middle of this say after about 20 min there was a power failure (quiet common in India unfortunately ) When i boot my PC the GRUB gave me the options Windows and ubuntu. Selecting Ubuntu loading and initialization went fine only to show me a big Ubuntu wallpaper which wont allow me to do any thing. I hard reboot my PC and selected the recovery mode which gave me a command prompt with root user as the current user. I am not a linux expert to fix the problem through command prompt. Looking for a solution as i would like to learn something from problem .