Christof999 wrote: (about installed packages) Is there a way to back this up or automate it for next time ?
1. Backup /etc/apt/sources.list
... or copy it to one of your other systems.
2. On system #1 issue this command:sudo dpkg --get-selections > packagelist.txt
=> This will write your package selections and the status of all packages into that text file "packagelist.txt". Now copy that file to your other system(s).
3. On your other system(s) you now read in that file:sudo dpkg --set-selections < packagelist.txt
=> System #2 will now take over the package selections that were previously defined on system #1
4. All you need to do now is to execute the install process:sudo apt-get dselect-upgrade
=> Result: System #2 will now have the same packages installed like system #1.
"Armed" with these commands you can clone installations (e.g. produce identical systems with identical software selections) in a couple of minutes. Just make sure you get the /etc/apt/sources.list
right (e.g. it should be the same on all systems).
Christof999 wrote: Whats possible to back up ...
Everything. With my "tar + gzip" method you can in fact clone an entire machine if you wanted to. There are nicer methods to do this, but my "primitive" method at least will work even under worst circumstances. See the links above posted earlier.
Christof999 wrote: I know sooner or later something will get broken or a new system will come out and Ill reinstall or upgrade. I want to try and save some time as it takes about one full day to set up everything since I have three computers.
I suggest reading this book: "UNIX Backup & Recovery". Highly recommended.
I really should post my backup scripts here ...