Instructions follow for working with Raspian VMs in QEMU in Ubuntu 14.04 x64. We start with a bootable image from XEC Design. Before starting, review the guides http://xecdesign.com/qemu-emulating-raspberry-pi-the-easy-way/ and http://paulscott.co.za/blog/full-raspberry-pi-raspbian-emulation-with-qemu/ for basics, and http://www.raspberrypi.org/forums/viewtopic.php?f=51&t=45265 for extending the root filesystem using parted and resize2fs. First bring Ubuntu up to date: Code: # sudo apt-get update # sudo apt-get dist-upgrade # sudo reboot Then install QEMU and download the latest image and kernel: Code: $ sudo apt-get install qemu-system qemu-user-static binfmt-support $ mkdir qemu_vms $ cd qemu_vms $ wget http://downloads.raspberrypi.org/raspbmc_latest $ mv raspbmc_latest sd.img.gz $ wget http://xecdesign.com/downloads/linux-qemu/kernel-qemu $ gunzip sd.img.gz $ ls kernel-qemu sd.img Then start the VM, and restart it four more times, to configure and update: Code: $ qemu-system-arm -kernel kernel-qemu -cpu arm1176 -m 256 -M versatilepb -no-reboot -serial stdio -append "root=/dev/sda2 panic=1 rootfstype=ext4 rw" -hda sd.img => did step 1 of 2 $ qemu-system-arm -kernel kernel-qemu -cpu arm1176 -m 256 -M versatilepb -no-reboot -serial stdio -append "root=/dev/sda2 panic=1 rootfstype=ext4 rw" -hda sd.img => did step 2 of 2 $ qemu-system-arm -kernel kernel-qemu -cpu arm1176 -m 256 -M versatilepb -no-reboot -serial stdio -append "root=/dev/sda2 panic=1 rootfstype=ext4 rw" -hda sd.img => Raspbmc Updater started => updated kernel $ qemu-system-arm -kernel kernel-qemu -cpu arm1176 -m 256 -M versatilepb -no-reboot -serial stdio -append "root=/dev/sda2 panic=1 rootfstype=ext4 rw" -hda sd.img => downloaded stuff $ qemu-system-arm -kernel kernel-qemu -cpu arm1176 -m 256 -M versatilepb -no-reboot -serial stdio -append "root=/dev/sda2 panic=1 rootfstype=ext4 rw" -hda sd.img => Raspbmc Updater started => Updating service management => Downloading new Kodi build => Extracting Kodi => wait for loop to start: "Relax, Kodi will restart shortly; Press ESC key for a command line" Now login, using the terminal, not the QEMU window, and do some maintenance: Code: $ sudo nano /etc/udev/rules.d/90-qemu.rules KERNEL=="sda", SYMLINK+="mmcblk0" KERNEL=="sda?", SYMLINK+="mmcblk0p%n" KERNEL=="sda2", SYMLINK+="root" $ sudo apt-get update $ sudo apt-get install parted $ sudo shutdown -hP now Now boot again to make sure that the image is ready to use: Code: $ qemu-system-arm -kernel kernel-qemu -cpu arm1176 -m 256 -M versatilepb -no-reboot -serial stdio -append "root=/dev/sda2 panic=1 rootfstype=ext4 rw" -hda sd.img And login using terminal, not the QEMU window: Code: $ df -ah Filesystem Size Used Avail Use% Mounted on /dev/sda2 1.2G 799M 299M 73% / proc 0 0 0 - /proc devpts 0 0 0 - /dev/pts /dev/sda1 69M 6.4M 63M 10% /boot $ sudo shutdown -hP now Now that we have a functional sd.img, we need two copies: 1) "working.img" to enlarge and work in 2) "boot.img" to boot from while working on "working.img" Code: $ cp sd.img working.img $ cp sd.img boot.img Now we add 5 GB to working.img: Code: $ qemu-img resize working.img +5G Image resized. Then we boot from boot.img, with working.img attached as /dev/sdb, so that we can remove the Linux partition information (but not the data) and recreate the partition filling the disk: Code: $ qemu-system-arm -kernel kernel-qemu -cpu arm1176 -m 256 -M versatilepb -no-reboot -serial stdio -append "root=/dev/sda2 panic=1 rootfstype=ext4 rw" -hda boot.img -hdb working.img And login using terminal, not the QEMU window: Code: $ sudo su # fdisk /dev/sdb Command (m for help): p Disk /dev/sdb: 6731 MB, 6731857920 bytes 4 heads, 32 sectors/track, 102720 cylinders, total 13148160 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x3ac32cfc Device Boot Start End Blocks Id System /dev/sdb1 4096 147455 71680 c W95 FAT32 (LBA) /dev/sdb2 151552 2662399 1255424 83 Linux Command (m for help): q # parted /dev/sdb GNU Parted 2.3 Using /dev/sdb Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) unit chs (parted) print Model: QEMU QEMU HARDDISK (scsi) Disk /dev/sdb: 818,110,59 Sector size (logical/physical): 512B/512B BIOS cylinder,head,sector geometry: 818,255,63. Each cylinder is 8225kB. Partition Table: msdos Number Start End Type File system Flags 1 0,65,1 9,45,35 primary fat32 lba 2 9,110,37 165,185,19 primary ext4 (parted) rm 2 (parted) print Model: QEMU QEMU HARDDISK (scsi) Disk /dev/sdb: 818,110,59 Sector size (logical/physical): 512B/512B BIOS cylinder,head,sector geometry: 818,255,63. Each cylinder is 8225kB. Partition Table: msdos Number Start End Type File system Flags 1 0,65,1 9,45,35 primary fat32 lba (parted) mkpart primary 9,110,37 818,110,59 (parted) print Model: QEMU QEMU HARDDISK (scsi) Disk /dev/sdb: 818,110,59 Sector size (logical/physical): 512B/512B BIOS cylinder,head,sector geometry: 818,255,63. Each cylinder is 8225kB. Partition Table: msdos Number Start End Type File system Flags 1 0,65,1 9,45,35 primary fat32 lba 2 9,110,37 818,110,59 primary ext4 (parted) quit Information: You may need to update /etc/fstab. # shutdown -hP now Now we can boot resized working.img, in order to expand the filesystem to fill the partition. Code: $ qemu-system-arm -kernel kernel-qemu -cpu arm1176 -m 256 -M versatilepb -no-reboot -serial stdio -append "root=/dev/sda2 panic=1 rootfstype=ext4 rw" -hda working.img And login using terminal, not the QEMU window: Code: $ sudo su # df -ah Filesystem Size Used Avail Use% Mounted on /dev/sda2 1.2G 800M 298M 73% / proc 0 0 0 - /proc devpts 0 0 0 - /dev/pts /dev/sda1 69M 6.4M 63M 10% /boot # resize2fs /dev/mmcblk0p2 resize2fs 1.42.5 (29-Jul-2012) Filesystem at /dev/mmcblk0p2 is mounted on /; on-line resizing required old_desc_blocks = 1, new_desc_blocks = 1 The filesystem on /dev/mmcblk0p2 is now 1624576 blocks long. # df -ah Filesystem Size Used Avail Use% Mounted on /dev/sda2 6.1G 801M 5.1G 14% / proc 0 0 0 - /proc devpts 0 0 0 - /dev/pts /dev/sda1 69M 6.4M 63M 10% /boot # fdisk /dev/sda Command (m for help): p Disk /dev/sda: 6731 MB, 6731857920 bytes 4 heads, 32 sectors/track, 102720 cylinders, total 13148160 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x3ac32cfc Device Boot Start End Blocks Id System /dev/sda1 4096 147455 71680 c W95 FAT32 (LBA) /dev/sda2 151552 13148159 6498304 83 Linux Command (m for help): q # shutdown -hP now Now we have a Raspian VM with lots of free space to play with
