Перенос новой системы на новое оборудование?

When moving to completely new hardware, it is recommended to do a completely fresh install. Many Linux distributions have customization and optimization based on different hardware detected upon installation. Even if everything seems to be running fine, your system could be running more slowly due to poor optimization, or new features not being enabled, etc.

One benefit of migration is that you can keep the old system alive until the new system is performing as you wish. If you update the existing machine, you can bring it to a broken state, which would make it harder to replicate or pull information from it.

On the new system, simply get the OS running. Then, one by one, get each application you wish to run working properly. Instead of trying to install everything at once and potentially run into many issues, take each program, one at a time, and get it working. I hope it's clear how this will help with your sanity and identifying and tackling issues.

You may notice that things work out of the box that used to require manual intervention. For example, maybe you haven't messed with any Xorg files, but your monitor works. This is an example of when blindly copying all the config files at once would be bad. Don't adjust things that work until you have reason.

There are a few things that may help with migrating, however. For example, configurations for various programs can be found in each user's ~/.config directory. Unfortunately this isn't true for every program, and some may store their settings elsewhere. This is why having the old system up and running is handy.

You may have special system configurations, or system-wide configurations for different applications. It's good to keep track of these files yourself, but you can use the following command to help remind yourself:

dpkg-query -W -f='${Conffiles}\n' '*' | awk 'OFS="  "{print $2,$1}' | md5sum -c 2>/dev/null | awk -F': ' '$2 !~ /OK/{print $1}'

Another approach may be to use directories and different partitions to isolate data in ways that make targeting system or application data erasure possible.

While you're not actually upgrading, take a look at the previous LTS to current LTS upgrade documentation (ie: 18.04 to 20.04 Upgrade Docs) to see if there are any big changes. Large changes will be found here, such as the switch to systemctl. The maintainers try very hard to make new releases similar/compatible, but sometimes big changes require some manual steps.