增加 Linux 挂载 Image 文件.
Signed-off-by: rick.chan <chenyang@autoai.com>
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# Linux 挂载 Image 文件
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```bash
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sudo fdisk -lu <img>
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# 显示类似如下信息
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Device Boot Start End Blocks Id System
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<img> * 2048 1026047 512000 83 Linux
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```
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将 Start\*512 得到 mount 的 offset(512 是一个扇区的大小,以上面为例子就是 2048\*512)。
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```bash
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sudo mount -o loop,offset=<offset> <img> <mount point>
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```
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使用完毕后用如下命令卸载:
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```bash
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sudo umount <mount point>
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```
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