How to edit ubuntu cloud image

wget https://cloud-images.ubuntu.com/bionic/current/bionic-server-cloudimg-amd64.img sudo modprobe nbd max_part=1 sudo qemu-nbd –connect=/dev/nbd0 bionic-server-cloudimg-amd64.img sudo mount /dev/nbd0p1 /mnt/nbd/ -o noatime pushd /mnt/nbd sudo mount -t proc proc proc sudo mount -t sysfs sysfs sys sudo mount -t devtmpfs devtmpfs dev sudo mkdir -p dev/pts READ MORE

Edit qcow2 ufs image

If your image has UFS filesystems, qemu-nbd on Linux is useless. Here is what you do (example with a vsrx image): qemu-img convert -f qcow2 -O raw junos-vsrx3-x86-64-18.4R1.8.qcow2 junos-vsrx3-x86-64-18.4R1.8.img mdconfig -a -t vnode -f junos-vsrx3-x86-64-18.4R1.8.img -u 0 mount /dev/md0p2 /mnt READ MORE