CentOS 7.x change filesystem UUID

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Changing filesystem UUID is required for cloned systems. This is also required if a boot root device is detached from a AWS VM and attached to another VM created with same AMI ID. To change UUID use following steps:

1. Find UUID using blkid
2. Generate new using uuidgen
3. Update filesystem UUID
   • For ext filesystems update using:

     tune2fs <device> -U <new-UUID>

   • For xfs use:

     xfs_admin -U generate <device>

Refer:

• https://docs.oracle.com/cd/E37670_01/E37355/html/ol_admin_xfs.html
• http://www.sudo-juice.com/how-to-change-the-uuid-of-a-linux-partition/

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