[Linux] 如何定制 initrd.img

binwalk /boot/initrd.img-6.1.0-13-amd64

DECIMAL HEXADECIMAL DESCRIPTION

0 0x0 ASCII cpio archive (SVR4 with no CRC), file name: "kernel", file name length: "0x00000007", file size: "0x00000000" 120 0x78 ASCII cpio archive (SVR4 with no CRC), file name: "kernel/x86", file name length: "0x0000000B", file size: "0x00000000" 244 0xF4 ASCII cpio archive (SVR4 with no CRC), file name: "kernel/x86/microcode", file name length: "0x00000015", file size: "0x00000000" 376 0x178 ASCII cpio archive (SVR4 with no CRC), file name: "kernel/x86/microcode/.enuineIntel.align.0123456789abc", file name length: "0x00 000036", file size: "0x00000000" 540 0x21C ASCII cpio archive (SVR4 with no CRC), file name: "kernel/x86/microcode/GenuineIntel.bin", file name length: "0x00000026", file si ze: "0x006DDC00" 7200432 0x6DDEB0 ASCII cpio archive (SVR4 with no CRC), file name: "TRAILER!!!", file name length: "0x0000000B", file size: "0x00000000" 12847157 0xC40835 gzip compressed data, ASCII, last modified: 1993-0 9-23 09:11:30 44020969 0x29FB4E9 Object signature in DER format (PKCS header length : 4, sequence length: 407 60068642 0x3949322 Zlib compressed data, best compression 60075195 0x394ACBB Zlib compressed data, default compression 64419970 0x3D6F882 XML document, version: "1.0" 64423732 0x3D70734 Zlib compressed data, best compression

找了很多教程，基本过时了，直接解压得到很小的文件夹，截取 12847157 后的 gzip 解不开啊解不开