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dpkg set-selections package database

When trying to reproduce installed packages from one Debian (or Ubuntu) to another, the built-in solution is to

  1. Get the installed packages on the one hosts and store a dump to a file
  2. Copy that dump to the second host
  3. Set the packages listed in the dump to be installed
  4. Run the installation


This is respectively achieved with

  1. $ dpkg --get-selections > /tmp/installed-software
  2. $ scp 172.16.16.35:/tmp/installed-software /tmp/
  3. # dpkg --set-selections < /tmp/installed-software
  4. # apt-get -u dselect-upgrade


But on step 3, I often run into a "dpkg: warning: package not in database at line X:".
Thanks to , the solution is to install "dselect" first:


# apt-get install dselect
Then perform again step 3 then step 4.

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