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下载看了看,根目录就initrd64里边,你可以找个ext3或者ext4分区,从iso中提取initrd64到用户目录,然后: 
用binwalk看看这个cpio压缩包里的文件被压缩在那一段。 
binwalk initrd64 
发现有一段lzma压缩的数据,那就是它了,有的initrd是gz压缩的 
root@ThinkPad:/home/my9823/Downloads# binwalk initrd64  
 
DECIMAL       HEXADECIMAL     DESCRIPTION 
-------------------------------------------------------------------------------- 
0             0x0             ASCII cpio archive (SVR4 with no CRC), file name: ".", file name length: "0x00000002", file size: "0x00000000" 
112           0x70            ASCII cpio archive (SVR4 with no CRC), file name: "REAMDE", file name length: "0x00000007", file size: "0x0000003A" 
292           0x124           ASCII cpio archive (SVR4 with no CRC), file name: "TRAILER!!!", file name length: "0x0000000B", file size: "0x00000000" 
512           0x200           LZMA compressed data, properties: 0x5D, dictionary size: 67108864 bytes, uncompressed size: -1 bytes 
4972442       0x4BDF9A        Cisco IOS experimental microcode, for "4" 
为了防止看花眼,建个目录进去载解压 
mkdir 123; 
cd 123; 
dd if=../initrd64 bs=512 skip=1 |unlzma|cpio -idm 
好了,123目录就是initrd64的全部文件。大概280M左右。 
 
 
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