[ubuntu] Recover list of applications installed

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http://ubuntuforums.org – I removed lightdb and as a result can not get into Ubuntu 12.04 I am therefore using the LiveCD in the following commands. I need to extract a list of installed programs in the crashed installation. What am I doing wrong, because I can not see the package.selections appearing in sdc? (What I aim to do is create a full list of installed files which I can read back into a fresh install using rsync.) ubuntu@ubuntu:/$ sudo mount -t ext4 /dev/sda1 /mnt # ok as /dev/sda1 already mounted or /mnt busy ubuntu@ubuntu:/$ sudo mount -t proc proc /mnt/proc ubuntu@ubuntu:/$ sudo mount -t sysfs sy (Hardware)