qemu with serial output

Problem: You want to run a virtual machine in a terminal, tmux or screen.

Solution:

• Disable graphics
• Have a serial console in virtual machine
• Use the serial console from host terminal

• vm$ vi /etc/default/grub
• add console=ttyS0 to GRUB_CMDLINE_LINUX_DEFAULT
• vm$ sudo update-grub

• $ kvm -nographic -serial mon:stdio -hda yourimage.img -smp 2 -m 1G
• kernel messages and login appear to terminal after a few seconds

#qemu