Change UUID on a FileSystem

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Check current UUID blkid values:

root@datadroid:~# blkid|grep sda2
/dev/sda2: LABEL="omv" UUID="a4b494db-320a-4ce2-bb3a-841db943f9c0" TYPE="ext4" PARTUUID="000ddd31-02"

To update or modify the UUID run tune2fs

root@datadroid:~# tune2fs /dev/sda2 -U 804a6f55-0432-491b-9a97-65cff6571f3d

Check again 
root@datadroid:~# blkid|grep sda2
/dev/sda2: LABEL="omv" UUID="804a6f55-0432-491b-9a97-65cff6571f3d" TYPE="ext4" PARTUUID="000ddd31-02"

#Villa's syslog