Ubuntu 12.04 complete update?

Question

linux

I had it on 11.10. Postponed-postponed the update to 12.04 and still decided.
The process began, estimated by the system at 2.5 hours.
After about 60-70% of this process, my electricity went out.
Now the system doesn’t boot at all… Of course, you can demolish it and install everything over again, but there is a configured IDE, nginx and apache with a bunch of configs, a custom working environment for so long :( everything is gone… Is it
possible to somehow restore the system or is it all kirdyk?

Answer 1

In such a situation, I booted into recovery mode from the installation disk and finished the update, corrected the consequences.

Answer 2

I recommend picking up all the necessary configs through the live sit and putting it clean on 12.04. I once, it seems, updated the freshly installed 10.04 and barely touched it, rather touched the SATA cable in an open case. Everything, the car went into reboot during the update and refused to start. Finally changed it.

Answer 3

Does your bootloader not start, or does an error occur during the system boot process?
If the first, then liveCD + google (bootloader recovery) is treated.
If the latter, then you can try liveCD -> chroot -> try updating again. Here either it will turn out to be updated, or it will break off with the words that something is blocked and I can’t. If it starts to swear, go to Google on the issue of restarting the update.
These are recipes, I don’t remember the exact commands, but I also cut out the light during the update, though it loaded normally. However, I had to restart the updates - the task is not too difficult (it took me 2 hours to google), but the reinstallation prospects are better.

Answer 4

Do you have home on a separate partition? If yes, then just choose not to format it during installation. You can read where what should lie, for example, here , save the necessary folders from the LiveCD. True, where the developer decides to put the configs depends only on him.

Answer 5

Boot from any Live-CD distribution, open a terminal, mount your old Ubuntu partition and copy over all the necessary configs. Pretty much everything you set up in your work environment is in /home/. You can directly copy the entire home branch.
After installing Ubuntu, replace the entire home directory (as a rule, all system bash scripts in the home directory do not change in Ubuntu from version to version; in extreme cases, the system itself will add the necessary files or report their absence) or simply copy the configs you need from old system selectively.

Answer 6

Boot from something, chroot into the system and try to complete the installation.

Answer 7

don't forget about databases in /var/db