Mount /usr on different partition

Question

I want to mount /usr directory on different partition and keep the same owner on all files and subdirectories in /usr directory.

I want to mention that this issue is for linux ec2 machine where I can't enter to the single-user runlevel.

Is it possible?

Answer 1

Yes, this is almost certainly possible.

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• Mount the new partition somewhere in your filesystem.
  • mount /path/to/device /mnt
• Copy the contents of your current /usr to the new partition.
  • rsync -a /usr /mnt
• Unmount the new partition.
  • umount /mnt
• Update your /etc/fstab to reflect the changes.
  • /path/to/device /usr defaults 0 0
• Mount the new partition.
  • mount /usr

Answer 2

for the rsync arguments, try this: "rsync -avxHAXP", the "X" will preserve SE linux context.