I'm working with a specific software package that is only compatible with a older linux kernel version. After installing this older version via the following command
$ sudo apt-get install linux-image-3.19.0-49-generic \ linux-headers-3.19.0-49 linux-headers-3.19.0-49-generic
I rebooted, but wasn't able to get the GRUB GUI screen to open. Looking around online I came across this:
Rather than using a number to pick
GRUB_DEFAULT, I used the following suggestion:
GRUB_DEFAULT="Advanced options for Ubuntu>Ubuntu, with Linux 3.19.0-49-generic"
Notice that I created a backup before editing
/etc/default/grub. On boot, this time the machine booted using the correct kernel but it went to what looks like a terminal but has no keyboard response. Seeing this, I decided to revert back to the original kernel but it is not listed on the GRUB GUI (it works for some reason now, or just may not have been pushing the key fast enough).
Instead all I have on the GUI is Ubuntu and Advanced options. I am therefore able to get into the grub prompt, ie:
I feel as though this should be a very straight forward fix, either to get the older kernel to boot correctly, or boot the original. Either works.
However, I have absolutely zero experience or knowledge with the GRUB command line. Any help would be greatly appreciated.