A few command to help migrate from old Ubuntu/Debian machine to a new one and reinstall all of the aptitude packages.

debian_migrate_pkglist.sh

# On the old machine, create a list of all installed packages
apt list --installed 2>/dev/null | sed 's/\/.*//g > pkglist'


# On the new machine, Filter packages for those available
while read package; do apt show "$package" 2>/dev/null | grep -qvz 'State:.*(virtual)' && echo "$package" >>packages-valid && echo -ne "\r\033[K$package"; done <packages

# Install the available packages all at once
sudo apt install $(tr '\n' ' ' <packages-valid)