Boot Ubuntu Server Image for rock pi 4b in QEMU

#1

Hi, How can I boot the kernel in the image using qemu-aarch64 and mount the rootfs to update it?

#2 
sudo apt-get install binfmt-support qemu-user-static
sudo mount rootfs.ext4 /mnt
sudo chroot /mnt
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#3

Yes,we can do that. But in some cases I wanted to check if the image is build correctly then how can I do that.

We can flash and check it, but if we were some how able to emulate the machine then we can check image faster and our image creation cycles can be fast.

#5

check image faster and our image creation cycles can be fast

You can use network file system and test on real hardware. Use nfs as rootfs, and mount your boot partition on /boot. You can test new kernel and applications in this way.