Yesterday I tried upgrading from 10.04 to 10.10 using the upgrade manager. About half way through, my computer froze up and the only thing I could do was reboot my computer. It had already finished downloading all the upgrades and the computer froze while it was trying to install the upgrades.
When I boot my computer and the Grub screen appears, I chose the Ubuntu OS (I have a dual boot system of Ubuntu and Windows XP). When it goes to boot Ubuntu, it gives me a blank screen and then a box in the right hand corner that says this:
The configuration defaults for GNOME Power Manager have not been installed correctly. Please contact your computer administrator."
Then the screen remains blank. No cursor, no mouse pointer, nothing.
I have researched this error message and it is either caused by not having any free space on my hard drive or that the upgrade packages weren't installed properly. In my case, it could be both. It is definitely the packages not be installed properly but I don't know how to find out if there is no free space on the hard drive partition for Ubuntu. Some of the solutions are to use the following commands in the terminal:
sudo apt-get clean
sudo dpkg --configure -a
sudo apt-get --reinstall install ubuntu-desktop
The last command might cause me to lose previous settings, so that would be a last resort if the first two commands don't work.
So my main issue is that I cannot open a terminal. My computer is set up to automatically log in. When my computer boots, I have the Grub screen which allows me to choose the Ubuntu OS, Ubuntu in recovery mode or Windows Xp. However, when I choose Ubuntu in recovery mode and select "c" for the command line, it does not recognize the "sudo" command. Same when I choose the command line in the regular Ubuntu OS. When I type "sudo apt-get clean" (without quotes), it says "Sudo command not found."
I cannot find the command lines that would be the equivalent of a "sudo" command to use in recovery mode. If you hit the TAB key while in the command line of recovery mode, if gives a list of commands but I don't see a way to open up a terminal window.
For example, when I type terminal_input, it just says, Active: Console, Available: usb_keyboard."
I have also tried selecting the Ubuntu OS, waiting for it to boot and then hitting Ctrl+Alt+F1 but it does not give me a log in screen. I have tried Ctrl+Alt+F2 and Ctrl+Alt+F7 and neither of those give me a log in screen either. It is just a blank screen. No cursor or mouse pointer is visible.
All I want is the ability to open up the terminal so I can run "sudo apt-get clean" and "sudo dpkg --configure -a".
If anyone knows how this can be done, please give me step by step instructions on how to do it.