Synchronize Ubuntu packages

Most of the time I have more than one computer that I use. One problem is to have all installed applications synchronized. This is quite useful if you develop scripts which need special applications to run. So from time to time I synchronize /etc/apt/source.list first followed by:

apt-get clean all
apt-get update
apt-get dist-upgrade

The next step is to get a list of all installed applications:

dpkg --get-selections "*" > /tmp/deb-list.txt

Now I distribute the generated file to my second box and run:

dpkg --set-selections < /tmp/deb-list.txt

apt-get dselect-upgrade

The result is, I have all applications that I have installed on my first box also installed on my second box.