I was connected to my aws debian wheezy server and while running `apt-get upgrade` the ssh pipe broke. I didn't use `screen` or anything, so I don't think there's a way to recover that session. 

If I reconnect with a new ssh session and run `ps aux | grep apt`, I can see that `apt` and `dpkg` are [still running](http://cl.ly/Xd44)

They've been running for hours actually. I can't imagine that it would be safe to kill those processes as they might be modifying system libs/binaries, but what can I do? What if they are waiting for keyboard input or the like? I had said `y` when `apt` originally asked me to install the updates, but I don't know if it needed further user input. I plan on waiting a few more hours for `dpkg` and apt to hopefully complete what they're doing.. but if nothing happens, what are my options?