A month ago or so I wanted to make sure I still had access to my Linux box while away from home.  I did NOT take the time to properly harden the box and got some malware installed into the init scripts and crontabs.  I since removed the default gateway so it is unable to send dDOS attacks outbound.  Unfortunately I am also running mdadm on the box.  I have the OS (/) on md0 and all of my files on md1 (/home).  I want to blow away the OS partition but am worried it may effect my /home (md1) partition.  What is the best way to fix this issue (without losing my /home partition)?
I would like to install Ubuntu 14.04.02 LTS on my machine which currently has Mageia 4.1.   So, I have the following partitions: One for /, one for swap and one for /home.   I have some important data on /home which I wouldn't like to lose (I have backed them up, but I would prefer to keep them) after a clean install. I plan to reformat partitions one and two as above and keep the /home one.   Will I be able to tell Ubuntu to do so during an installation? By this I mean: Will it be able to recognize the /home partition and keep all its data intact while formatting the rest? And one more question: Will it be able to keep the users as they are our will I be forced to change them too? (I have the bad feeling that it won't be able to keep the users as they are...)
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