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initrd-2.6.9-5.EL.img
解压
gzip -dc initrd-2.6.9-5.EL.img |cpio -div
压缩
find xxx yyy | cpio -ov -H crc |gzip -9> zz.cgz
解压缩 .cgz文件
cpio -divm <**.cgz
打开initrd.img文件
mv initrd.img initrd.gz
gzip -d initrd.gz
mount -o loop initrd /dir
gzip
-d decompress
-c write on standard output, keep original files unchanged
-9 compress better
cpio
-d Create leading directories where needed
-i Extract files from an archive (run in copy-in mode)
-v Verbosely list the files processed
-m Retain previous file modification times when creating files
-o Create the archive (run in copy-out mode)
-H –format=FORMAT Use given archive FORMAT
