I've unzipped zip files for custom kernels and noticed that the majority of the files that are being applied are in a /kernel folder. However that folder is unlisted when listing the root directories using both Root Explorer and ES File Explorer. Where is this /kernel folder?

2 Answers 2


The kernel is part of the "boot image", which is stored in a separate partition in the flash memory, not in a normal file. See http://android-dls.com/wiki/index.php?title=HOWTO:_Unpack,_Edit,_and_Re-Pack_Boot_Images


May be you can explain a little bit more on what you are trying to do.. Also, if you can list those custom kernel files, we can help better.

If I need to flash a custom kernel, I follow below process:

  1. Get the source from the git repository
  2. Make my changes to the kernel source. Change could vary from adding a simple debug printk statement to adding a new driver.
  3. Build the kernel source using cross-compiler toolchain
  4. Change the phone to Fastboot mode (I'm talking bout G1 phone)
  5. Use 'fastboot' to flash the custom kernel (zImage) using command: 'fastboot flash:raw boot zImage ramdisk.img'
  6. Use 'fastboot reboot' command to reboot the phone using the new kernel

Hope there is some clarity now.

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