Can I install Ubuntu 14.04 or 16.04 on jetson nano?

I want to install ubunut14.04 on nano, but I cannot find the image file.where to download the image file if it can install?Thanks very much.

Per my understanding, there is no such image.
Although you can change the rootfs, but it’s not suggested.
May I know the reason you want to use the old Ubuntu versions? In order to use ROS trusy or kinetics?

Yes, I want to use indigo to migrate the code. There are a lot of modification work needs to be done if use melodic.

Actually, many our customers mentioned this too. And we provided Ubuntu16.04 on Xavier, which Official not provide.
I fully understand our customer’s difficulty, the upgrade is time cost.

But to be honest, I still suggest to move to 18.04 melodic. Because the upgrade is not so time cost as it looks like.

Also, 14.04 and 16.04 will be EOL and official stop support very soon. And only very old opencv support there.
Stay on 14.04 and 16.04 will face more and more problem. And soon you will have to face the upgrade issue.

It just looks like the easiest way, but the time still will be charged later.