how can apply changes to all installed os of Distro?

Pankaj,

Just to understand...

  #1. You customized your OS in Cubic.
  #2. You created a bootable ISO of step #1.
  #3. You installed the OS from step #2 onto multiple computers.

Now you would like to make a change on your local computer, and have your change distributed to all computers in step #3?

If this is what you are trying to do, Cubic wouldn't be the tool used to propagate your changes to all of your computers.

However, one thing you could do is ssh into each computer, log in as an admin user, and run a script that updates the computer. You might even be able to create a script that ssh's into each computer automatically. The script can update each computer, so you don't have to run it manually on each machine. You'll have to generate ssh private and public keys, and place the public key on each computer so your script can auto-login.

Another option would be to setup a PPA. Include the PPA as a repository on each computer. (You could use Cubic to create a custom OS that includes your PPA). Then, whenever you have an update to your packages, the computers would receive the updates. This is the kind of approach distros (like Ubuntu, Mint, etc.) take.

There may be other / better ways to do it, but this is all I can suggest.

Yes, but I want to add something rest things in that distro again, that I changed using cubic again. now I have a new distro with new changes but old distro has already installed multiple computers so how I could apply new changed by the new distro to old installed computers.

That I need to do and looking for the solution because I can't reformat and reinstall new distro.

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