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修改以下設定前，請先備份，萬一改錯還可以透過光碟救援去還原。

檢查使用UUID之分割:

[root@localhost etc]# vim /etc/fstab
/dev/mapper/rhel-root   /                       xfs     defaults        1 1
UUID=f9fef01c-c969-4595-9676-4504d3a0bf5b /boot                   xfs     defaults        1 2
/dev/mapper/rhel-home   /home                   xfs     defaults        1 2
/dev/mapper/rhel-swap   swap                    swap    defaults        0 0

確認/boot所對應的分割位置:

[root@localhost grub2]# blkid
/dev/sda1: UUID="f9fef01c-c969-4595-9676-4504d3a0bf5b" TYPE="xfs"
/dev/sda2: UUID="130rd3-2hqt-Rhpk-xU3D-Fi63-KEa7-JgiNLa" TYPE="LVM2_member"
/dev/mapper/rhel-root: UUID="2a0c5ae5-d39f-4ad5-a725-bbd8eb7b759a" TYPE="xfs"
/dev/mapper/rhel-swap: UUID="f17eede0-14c2-46b5-b756-44d02122c50d" TYPE="swap"
/dev/sr0: UUID="2014-09-15-11-54-53-00" LABEL="20140915-trusty-amd64" TYPE="iso9660" PTTYPE="dos"
/dev/mapper/rhel-home: UUID="d107c5cc-eb44-4629-8899-509d962ee0a0" TYPE="xfs"

取代UUID=f9fef01c-c969-4595-9676-4504d3a0bf5b為/dev/sda1:

[root@localhost etc]# vim /etc/fstab
/dev/mapper/rhel-root   /                       xfs     defaults        1 1
/dev/sda1 /boot                   xfs     defaults        1 2
/dev/mapper/rhel-home   /home                   xfs     defaults        1 2
/dev/mapper/rhel-swap   swap                    swap    defaults        0 0

[root@localhost etc]# vim /boot/grub2/grub.cfg
將UUID=xxxx都取代為blkid所找到的分割

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