Post-down ip tuntap del dev tap0 mode tapĮxplanation: this stanza auto loads a bridge and configures it using DHCP. Pre-up ip tuntap add dev tap0 mode tap user Remove the 'auto' line and change the 'method' of your physical, wired network adapters from 'auto' to 'manual': #auto eth0 Please note that all these changes must be done on the host system. To create a bridge between host and guests, do the following (tested on DebianSqueeze).
The host and guest will not see each other. That will push out deleted file scraps, recompression should work then.īy default, QEMU invokes the -nic and -user options to add a single network adapter to the guest and provide NATed external Internet access. If the guest system's image is still larger than reasonable, then open up the Guest system and run " dd if=/dev/zero of=/tmp/junk sync rm /tmp/junk". This conversion will save the same space and still be runnable: $ qemu-img convert -c debian.img -O qcow debian_recompressed.img After unpacking with tar xf, the sparse file is restored and can be booted immediately.īetter still, convert from a sparse file into the qemu's own "Copy On Write" image. This creates a tar file of about 320M (supposed that the image contains a 1.9GB ext3 root filesystem and a 250MB swap partition). After installing a Debian base system, it fits on a CD-ROM even without compression: $ tar c -sparse -f backup.tar debian.img The disk image "debian.img" is a sparse file.
the businesscard image at $ wget īoot the image with: $ qemu-system-x86_64 -hda debian.img -cdrom debian-testing-amd64-netinst.iso -boot d -m 512 Or with the qcow2 disk image format if you want to use QEMU's own "Copy On Write" image format: $ qemu-img create -f qcow2 debian.qcow 2Gĭownload a current boot image, e.g. If you're installing a desktop environment, you'll need more than 2G. A sid system can be set up with the following steps:Ĭreate the hard disk image with: $ qemu-img create debian.img 2G QEMU is especially handy to set up an emulated testing/unstable system when working on the Debian installer itself or on the boot system, or when trying some experimental features without impact on the productive system. The QEMU emulator is packaged as per-CPU-type packages: $ sudo apt install qemu-utils qemu-system-x86 qemu-system-guiĭebian developer Aurelien Jarno maintains a list of ready-to-use Debian stable QEMU images at (but as of, there is no update since 2015). + granting the user R/W access to /dev/kvm
+ x86 and ARM CPU w/ virtualization extensions
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