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如何更改分区的UUDI

 3 years ago
source link: https://www.lujun9972.win/blog/2018/12/31/%E5%A6%82%E4%BD%95%E6%9B%B4%E6%94%B9%E5%88%86%E5%8C%BA%E7%9A%84uudi/index.html
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如何更改分区的UUDI

当用 dd 命令进行分区对拷时，两个分区就有了相同的UUID，这种情况下就有必要手工修改分区的UUID了。

查看分区的UUID

使用 blkid 能够查看分区的UUID 

blkid

/dev/sda1: UUID="f1060c0a-bd02-4547-98d4-af3e1685e513" TYPE="swap" PARTUUID="18b918b8-01"
/dev/sda2: UUID="a3e3ff49-bb3d-4610-a898-c623d9ff4b2b" TYPE="ext4" PARTUUID="18b918b8-02"
/dev/sda3: UUID="aef39bc8-c88d-46bd-b600-34d267486fa7" TYPE="ext4" PARTUUID="18b918b8-03"

手工修改分区UUID

使用tune2fs能够修改分区的UUID： 

# 1. 卸载要修改UUID的分区
umount /dev/sda3
# 2. 设置UUID
tune2fs -U ${UUID} /dev/sdb1

其中 UUID 可以是一串由分号分割的十六进制数字，或者下面几个关键字:

clear清空文件系统中的UUID random随机生成一个UUID time根据时间生成一个UUID


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