Obtener UUID de las Particiones de Ubuntu es muy sencillo, solo tienes que ejecutar el siguiente comando en una consola, como usuario o como root, esto da los mismos resultados:
$ blkid
/dev/sda1: UUID="058B8BF06E17B4BA" LABEL="WindowsXp" TYPE="ntfs"
/dev/sda2: UUID="5CF6D99AF6D974AC" LABEL="HP_RECOVERY" TYPE="ntfs"
/dev/sda5: TYPE="swap" UUID="b85a9b16-6c9b-4e04-8078-95474c0ba775"
/dev/sda6 LABEL="/1" UUID="e430aed0-e502-47ea-9249-8e69b57c3814" SEC_TYPE="ext2" TYPE="ext3"
/dev/sda7: UUID="6aded2df-9e9d-4cb1-91b2-f9c8d0720522" TYPE="ext4"
/dev/sda8: UUID="b895f7f2-bc3c-407a-a12b-f0df9b606da8" TYPE="ext4"
$ ls /dev/disk/by-uuid
058B8BF06E17B4BA
5CF6D99AF6D974AC
6aded2df-9e9d-4cb1-91b2-f9c8d0720522
b85a9b16-6c9b-4e04-8078-95474c0ba775
b895f7f2-bc3c-407a-a12b-f0df9b606da8
e430aed0-e502-47ea-9249-8e69b57c3814
$ blkid
/dev/sda1: UUID="058B8BF06E17B4BA" LABEL="WindowsXp" TYPE="ntfs"
/dev/sda2: UUID="5CF6D99AF6D974AC" LABEL="HP_RECOVERY" TYPE="ntfs"
/dev/sda5: TYPE="swap" UUID="b85a9b16-6c9b-4e04-8078-95474c0ba775"
/dev/sda6 LABEL="/1" UUID="e430aed0-e502-47ea-9249-8e69b57c3814" SEC_TYPE="ext2" TYPE="ext3"
/dev/sda7: UUID="6aded2df-9e9d-4cb1-91b2-f9c8d0720522" TYPE="ext4"
/dev/sda8: UUID="b895f7f2-bc3c-407a-a12b-f0df9b606da8" TYPE="ext4"
$ ls /dev/disk/by-uuid
058B8BF06E17B4BA
5CF6D99AF6D974AC
6aded2df-9e9d-4cb1-91b2-f9c8d0720522
b85a9b16-6c9b-4e04-8078-95474c0ba775
b895f7f2-bc3c-407a-a12b-f0df9b606da8
e430aed0-e502-47ea-9249-8e69b57c3814
