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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)?

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  • in such a case I would use clonezilla to make a copy of the whole disk and each partition. Then you are on the safe side to return to any stage. You would need to boot from a Ubuntu live disk and start clonezilla from there. Use a USB HDD to store your backup.
    – CatMan
    Oct 16, 2017 at 19:17
  • In theory you can keep your data in HOME when you do a fresh install. See askubuntu.com/questions/630966/… and help.ubuntu.com/community/UbuntuReinstallation. In practice it is best to back up your data just in case =0
    – Panther
    Oct 17, 2017 at 4:38
  • @CatMan - Clonezilla does not support RAID so wont work.
    – Panther
    Oct 17, 2017 at 4:40

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There's no reason to think that the removal of one (RAID) block device will affect another. You can safely remove the system volume and keep the one with /home on it.

It's possible that the new Ubuntu installation won't pick up the old RAID configuration by itself in which case you need to do that manually after installation.

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