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Mac 下使用dd命令制作Centos USB启动盘

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1.挂载U盘
首先我们要挂载U盘,把U盘插入电脑,在终端下输入以下命令:

    diskutil list

系统输出如下:

 /dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *121.3 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                 Apple_APFS Container disk1         121.1 GB   disk0s2

/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +121.1 GB   disk1
                                 Physical Store disk0s2
   1:                APFS Volume Macintosh HD            78.4 GB    disk1s1
   2:                APFS Volume Preboot                 60.6 MB    disk1s2
   3:                APFS Volume Recovery                1.0 GB     disk1s3
   4:                APFS Volume VM                      1.1 GB     disk1s4

/dev/disk2 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *8.2 GB     disk2
   1:             Windows_FAT_32 CPBA_X64FRE             8.2 GB     disk2s4

可以看到,上面的/dev/disk2就是我们U盘的挂载点。

2.解挂U盘
接下来我们先ummount这个U盘,命令如下:

diskutil unmountDisk /dev/disk2

3.写入系统镜像到U盘
接下来我们要开始将镜像文件写入到U盘中去,命令如下:

dd if=/Users/apple/Downloads/CentOS-7-x86_64-DVD-1810.iso of=/dev/disk2 bs=4m

4.完成
等待中....

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