Edit: After the small talk with I realized, it should be possible to enter the chroot environment with qemu-user programs (qemu-arm in this case). To boot the Virtual machine, run: qemu-system-x86_64 -hda ubuntu.img -boot d -cdrom /home/sk/Soft_Backup/OS\ Images/New/ubuntu-15.04.
I already downloaded the installation image and kept it in my home directory. Then, download the Ubuntu 15.04 server installation image and boot the Virtual machine. To get a list of cpu.qemu-img create -f qcow2 ubuntu.qcow 20G. I needed to enter: qemu-system-arm -machine -cpu help.
I could not manage to make it work, I got the following message: qemu-system-arm: No machine specified, and there is no default Use -machine help to list supported machines.
