UUID 全称是 Universally Unique Identifier,每个分区都有一个唯一的 UUID 值,可以通过UUID指挂载分区,避免出现分区混乱的问题。
1、使用blkid命令查看UUID值:
# blkid /dev/sdb1: UUID="5b7d6b6b-f19a-42dc-a363-45bddfe1e536" TYPE="ext4" /dev/sda1: UUID="18bbf4bf-e262-4684-9e65-ba38beca5c83" TYPE="xfs" /dev/sda2: UUID="88640353-c4cf-44ff-8fd9-9dbdcbf6c027" TYPE="xfs" /dev/sda3: UUID="c0450c68-f837-4551-b30b-a27f5d021ed3" TYPE="xfs" /dev/sda5: UUID="45c29147-04b3-4367-a6c5-44b8d80ae802" TYPE="swap" /dev/sda6: UUID="b82d2c77-a0ee-4cd1-822a-8ebcb93b3c5f" TYPE="xfs" /dev/loop0: UUID="f2873bbd-b0b9-41f5-a760-0e27f0464c0b" TYPE="xfs"
2、使用ll /dev/disk/by-uuid/命令查看UUID值:
# ll /dev/disk/by-uuid/ 总用量 0 lrwxrwxrwx 1 root root 10 8月 9 16:02 18bbf4bf-e262-4684-9e65-ba38beca5c83 -> ../../sda1 lrwxrwxrwx 1 root root 10 8月 9 16:02 45c29147-04b3-4367-a6c5-44b8d80ae802 -> ../../sda5 lrwxrwxrwx 1 root root 10 8月 9 16:02 5b7d6b6b-f19a-42dc-a363-45bddfe1e536 -> ../../sdb1 lrwxrwxrwx 1 root root 10 8月 9 16:02 88640353-c4cf-44ff-8fd9-9dbdcbf6c027 -> ../../sda2 lrwxrwxrwx 1 root root 10 8月 9 16:02 b82d2c77-a0ee-4cd1-822a-8ebcb93b3c5f -> ../../sda6 lrwxrwxrwx 1 root root 10 8月 9 16:02 c0450c68-f837-4551-b30b-a27f5d021ed3 -> ../../sda3 lrwxrwxrwx 1 root root 11 8月 26 22:04 f2873bbd-b0b9-41f5-a760-0e27f0464c0b -> ../../dm-32
3、通过UUID值挂载分区:
# cat /etc/fstab UUID=b82d2c77-a0ee-4cd1-822a-8ebcb93b3c5f / xfs defaults 0 0 UUID=18bbf4bf-e262-4684-9e65-ba38beca5c83 /boot xfs defaults 0 0 UUID=c0450c68-f837-4551-b30b-a27f5d021ed3 /home xfs defaults 0 0 UUID=88640353-c4cf-44ff-8fd9-9dbdcbf6c027 /usr xfs defaults 0 0 UUID=45c29147-04b3-4367-a6c5-44b8d80ae802 swap swap defaults 0 0 UUID=5b7d6b6b-f19a-42dc-a363-45bddfe1e536 /datadisk ext4 defaults 0 0