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I want to modify the content in initramfs, but I don't know how to decompress and compress after executing the command sudo update-initramfs -c -k 6.4.0-rt8? It seems like the command sudo cpio -idv < initrd.img-6.4.0-rt8 can, but why is there only one kernel directory.

After executing lsinitramfs initrd.img-6.4.0-rt8 | less, it seems like there are many files?

This initramfs file is intended for use by other systems, not the current system.

#sudo update-initramfs -c -k 6.4.0-rt8
update-initramfs: Generating /boot/initrd.img-6.4.0-rt8

#sudo cpio -idv < initrd.img-6.4.0-rt8
#ls 
initrd.img-6.4.0-rt8  kernel

Thank you very much for pointing out this, but it solved my decompression problem. What should I do if I modify the decompression file and want to recompress it?

I am using Debian12.

just a student
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  • There are different methods for compressing the initramfs. Read the documentation of your used operating system. – paladin Sep 04 '23 at 08:28

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