Debian: Reinstalling a Server Almost Identically

Principle link

From a reference server, I want to quickly install another server with exactly the same packages.

Usage link

We’ll extract the list of installed packages from the reference server:

  dpkg --get-selections > my_packages.txt
  

Then reinstall everything from this package list:

  dpkg --clear-selections
dpkg --set-selections < my_packages.txt
apt-get update
apt-get dselect-upgrade
apt-get dist-upgrade
apt-get upgrade