Direct Linux BootThis section explains how to launch a Linux kernel inside QEMU without having to make a full bootable image. It is very useful for fast Linux kernel testing. The syntax is: qemu-system-i386 -kernel arch/i386/boot/bzImage -hda root-2.4.20.img -append "root=/dev/hda" Use to provide the Linux kernel image and to give the kernel command line arguments. The option can be used to provide an INITRD image. When using the direct Linux boot, a disk image for the first hard disk hda is required because its boot sector is used to launch the Linux kernel. If you do not need graphical output, you can disable it and redirect the virtual serial port and the QEMU monitor to the console with the option. The typical command line is: qemu-system-i386 -kernel arch/i386/boot/bzImage -hda root-2.4.20.img \ -append "root=/dev/hda console=ttyS0" -nographic Use Ctrl-a c to switch between the serial console and the monitor (see pcsys_keys).