Many times there is the problem, that I have only a small bandwith connection, and when running a `sudo aptitude safe-upgrade` or similar with a big download volume and then stumble upon a program that I want to install additionally via packagemanagement, then I have to remember that myself. Even worse when I have to add a ppa...

Is there a way to add the PPAs and add packages for installation to a queue even when there is another instance of an installation or upgrade is running?

I am using Ubuntu 11.10 and I am not bound to aptitude, apt-get or synaptic, but would prefer a CLI solution.