My machine won't boot or won't choose the right operating system when I choose it in the GRUB menu. What information do I need to provide in my questions so people can help me?
The boot info script it a great way to get information for what's going on, especially to troubleshoot what's going on with your boot and partitions.
sudo apt-get install boot-info-script pastebinit
And then run bootinfoscript.
If you need to share the information with someone to help you with your partitions (especially here on Ask Ubuntu, you can use it in conjunction with pastebinit to post your boot information on the web:
sudo bootinfoscript --stdout | pastebinit
This will automatically send the information to paste.ubuntu.com and return a URL for you. Take that URL and then edit it to your question.
Download the Boot Info Script
Extract the zip file to a directory of your choice.
Open a terminal (Applications -> Accessories -> Terminal in Gnome) and type:
sudo bash [path/to/the/download_folder]/boot_info_script.sh
For example if you downloaded the file to the desktop, use:
sudo bash ~/Desktop/boot_info_script.sh
You will now have the file RESULTS.txt in the same directory as the script. But if the script is inside a system directory (like /usr or
/etc) RESULTS.txt will be in the home directory.
If you have pastebinit installed you can send the results directly to paste.ubuntu.com:
sudo bash boot_info_script.sh --stdout | pastebinit
