Centos UUID확인방법

disk uuid 값 확인 법
```
$> ls -l /dev/disk/by-uuid
$> blkid
```

UUID생성명령어
```
$> uuidgen
1234-5678-9010
```

생성된UUID변경
```
$> tune2fs /dev/sda1 -U ****** 
```

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