Sharing updates between two installs

[rolnics]

I'm planning to have two installs on the same pc, so I can break / test one and still have a usable system.

I've got my partitions setup so I have a separate /home for both installs to share, but how do I share the updates? I'm going to use clonezilla to copy the working (/) partition, but how can I use the updates for both installs. I'm just trying to save downloading twice if possible. Is there a way to copy or use the updates applied in one partition to the other? Does apt save the updates somewhere?

[hatalar205]

All updates are saved in var/cache/apt/archives

You must copy them in the same directory in the other partition. But, in the other partition, you aren't allowed to copy them to that directory. So, Alt+F2 and write sudo nautilus and copy them. Then begin to update your system.