[LINUX LIVE USB]How to Make a bootable USB Drive to Install Fedora instead of using a physical DVD
This page explains how to create and use Live USB media . A Live USB system stored on flash memory, sometimes called a stick , lets you boot any USB-bootable computer into a Fedora operating system environment without writing to that computer's hard disk. The Live USB stick can feature an area to store changes to the system, called a persistent overlay . It can also have a separate area to store user account information and data such as documents and downloaded files, with optional encryption for security and peace of mind. Finally, with a non-destructive installation, pre-existing files and excess storage space on the stick are accessible from the system. Essentially, you can carry your computer with you in your pocket, booting it on nearly any system you find yourself using.
The process for most people is simple. Almost all USB sticks are provided by hardware manufacturers ready to use with this process. If you have any documents on your USB stick, it's not a bad idea to back them up before you start.
- Download the LiveUSB Creator program from http://fedorahosted.org/liveusb-creator if you're on Windows, or install on your Linux system using PackageKit or yum.
- Download the Live ISO image from http://fedoraproject.org/get-fedora .
- Insert your stick and run the LiveUSB Creator program.
Then reboot your system and use your computer's built-in function to choose the USB boot device -- usually this is a special key you hold down at boot time, such as F12 . Then enjoy!
If you are into technical details or want more information, please read on.
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A Live USB system is created from the same ISO image file that is used to create Live CD/DVD media. You can download ISO images for the official Fedora release from the Fedora download site . Consult How to create and use a Live CD for more information on creating your own customized ISO image file.
Lines beginning with "$" indicate commands you should type (do not include the $; this represents the command line prompt); subsequent lines represent typical output. You will need to run some commands as root.
System Requirements
- A working computer running Fedora or Windows. If you are using other Linux distributions, consider using dd or UNetbootin . UNetbootin is available in the Fedora repository as well
- A USB flash drive , also known as a USB stick, thumb drive, pen drive, or jump drive, with 1 GB or more of storage space, on a vfat file system (standard for almost all off-the-shelf USB media)
Ability to boot from USB media
Though most modern ones can, not all computers can boot from USB media, due to different BIOS settings and system capabilities. If your computer cannot do so, this procedure will not be useful. If you are not sure and don't mind downloading and installing an image on your USB drive (possibly wiping it of data), the only risk is wasting some time.
If your USB stick is not in working order, this procedure may fail. Watch for error messages during the process.
Some flash drives may not be bootable by default, even if your hardware is capable of doing so. You may need to mark the partition bootable or you may just need to reformat the flash drive. See Errors and Solutions below for more information.
Check the size of your USB stick
Many USB sticks indicate the size on the packaging or the outside of the stick.
If you don't know the size of the stick, or want to check it for data, you should be able to auto-mount the USB stick by inserting it into a USB port. You can check the contents and size using the graphical file manager. In Linux, you can also use the command line:
$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
143G 14G 122G 10% /
/dev/sda1 99M 12M 82M 13% /boot
tmpfs 1009M 0 1009M 0% /dev/shm
/dev/sdb1 3.9G 4.0K 3.9G 1% /media/usbdisk
USB drives are usually mounted in /media. In this case, the device is /dev/sdb1, has a 3.9GB capacity and is almost empty.
Take note of "/dev/sdb1" or equivalent; you will be specifying the device name if you use the command line method.
How to Partition
If the drive has not been partitioned properly (or if you are unsure), use fdisk to repartition it.
It is also possible to do a non-destructive installation of a LiveUSB image, if you have sufficient empty space. See How to install non-destructively below.
The fdisk command must be run as root. Include only the drive name in the command, not the partition number. Be sure to select the correct disk, or you may erase important data! Check the output of "df -h" if you are unsure. For example, if your partition will be /dev/sdb1, do:
$ /sbin/fdisk /dev/sdb
If you don't have fdisk installed, run yum install util-linux-ng as root.
The following session output from fdisk shows the responses to give to the prompts. The line starting Last cylinder ... refers to the size of the flash drive, so may be different than in the example.
Command (m for help): d
Selected partition 1
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-960, default 1): ↵
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-960, default 960): ↵
Using default value 960
Command (m for help): t
Selected partition 1
Hex code (type L to list codes): 6
Changed system type of partition 1 to 6 (FAT16)
Command (m for help): a
(给分区添加启动标志)
Partition number (1-4): 1
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: If you have created or modified any DOS 6.x
partitions, please see the fdisk manual page for additional
information.
Syncing disks.
How to Format
If your USB media has sufficient free space on a vfat file system already, you do not need to perform this step.
To finish, the partition must be formatted with an actual file system using mkdosfs as the root user. Unmount the device before using mkdosfs . In the below example, /dev/USBPARTITIONNAME might be, for example, /dev/sdb1. Be sure to select the correct partition; formatting destroys all data on it!
$ umount /dev/USBPARTITIONNAME
$ /sbin/mkdosfs -F 32 -n usbdisk /dev/USBPARTITIONNAME
If you don't have mkdosfs installed, run "yum install dosfstools" as root.
How to install non-destructively
Skip the repartitioning and formatting step above, and simply continue with the below steps. Please keep in mind you should have at least 1GB free. It is highly recommended to make a backup copy of the data on the USB drive before proceeding in case something goes wrong.
From a Downloaded Image
Download an ISO
(If you are using liveusb-creator - the "Graphical" method below, with a "supported" Fedora release, you can skip this step. The program will download the ISO for you.)
You can use BitTorrent or your web browser to download a bootable image, or ISO, which you will install on your USB drive.
Quick links:
- Supported releases
- Pre-releases (Alpha and Beta; redirects to previous supported release during pre-Alpha phase)
- Rawhide daily build
You are looking for a file with "Live" in the name, usually of the form "F<version>-<architecture>-Live.iso". For example, "F12-i686-Live.iso" is the Fedora 12 release for 32-bit Pentium Pro and compatible CPUs. "F13-Alpha-x86_64-Live.iso" is the alpha pre-release version of Fedora 13 for 64-bit Intel-compatible CPUs. Be sure to choose the correct file for your architecture. 32-bit releases will generally run on 64-bit hardware, but will not be optimized.
These instructions will also work for Custom Spins of Fedora Live ISO images, including those you make yourself with Revisor (a graphical tool), or LiveCD Creator (command-line tool used by Revisor). (Pungi is a command-line tool you can use to create installable ISOs, but not Live ISOs.)
If you use a LiveUSB with data persistence, you can use the "yum update" method described below to get the latest daily Rawhide RPMs (mostly for testers and not everyday use) except for the kernel . See Releases/Rawhide for more information about daily builds.
Live ISOs are not made daily for Branched, Alpha, Beta, and Final phases, only at the Alpha, Beta, and Final milestones.
Graphical Method - Windows or Fedora
Fedora LiveUSB sticks can be created in Windows and Linux using the liveusb-creator .
For Windows using the following steps:
- Download liveusb-creator from http://fedorahosted.org/liveusb-creator
- Double click 'liveusb-creator'
If you are using Fedora, you can use Add/Remove Programs and search for liveusb-creator or on the command line:
$ su -c "yum install liveusb-creator"
To start, run liveusb-creator on the command line, or on the GNOME menu, go to "Applications -> System Tools -> liveusb-creator".
Command Line Method - Linux only
In the following examples, replace "/path/to/ISO" with e.g. F12-Live-i686.iso or the full path to the ISO you downloaded, e.g. /tmp/F12-Live-i686.iso.
Replace /dev/USBPARTITIONNAME with the appropriate partition name. For example, /dev/sdb1 in the example above ("Check the size of your USB drive"). Be careful to specify the correct device, or you may lose important data!
The livecd-iso-to-disk method also works with netinst.iso and boot.iso files, even though these are not Live images.
Using dd for a direct copy
Fedora 12 and above, you can simply use dd although the specialized tools have additional features like non destructive writing and data persistence
$ dd if=F12-Live-i686.iso of=/dev/sdX bs=8M
Note that you want the device name (e.g. /dev/sdx) not the partition name (e.g. /dev/sdx1).
注意：/dev/sdX代表整个U盘，而不是某个分区！！！
Check livecd-tools
Make sure the livecd-tools RPM is installed.
$ rpm -q livecd-tools
You will see the name of the RPM and a version number if it is installed, and no output if it is not installed.
If "livecd-tools" is not installed, install it using yum.
$ su -c "yum install livecd-tools"
Run livecd-iso-to-disk script
Make sure that the USB drive is not mounted before executing the following, and give the root password when prompted.
$ su -c "livecd-iso-to-disk /path/to/ISO /dev/USBPARTITIONNAME"
Password:
Copying live image to USB stick
Updating boot config file
Installing boot loader
USB stick set up as live image!
In case it is not possible to boot from a disk created with the method shown above, you can also tell livecd to format the medium itself. Note that this method causes livecd to format the disk and thus erase all the data on it :
$ su -c "livecd-iso-to-disk --format --reset-mbr /path/to/ISO /dev/USBPARTITIONNAME"
Data Persistence
Data persistence means that your files and settings will remain even after you reboot your live system. You can perform updates just like a regular installation to your hard disk except for kernel updates which are not supported. The primary use of this feature is booting a USB stick with your live image as well as the persistent changes.
Use liveusb-creator, a graphical utility to do this easily. Liveusb-creator is available in the Fedora repository and for Windows users as well.
If you prefer the command line, you can run the following command:
$ livecd-iso-to-disk --overlay-size-mb 512 /path/to/ISO /dev/USBPARTITIONNAME
where 512 is the desired size (in megabytes) of the overlay. The livecd-iso-to-disk shell script won't accept an overlay size value greater than 2047 for VFAT, but for ext[23] filesystems it is only limited by the available space. You can find the livecd-iso-to-disk shell script in the LiveOS directory at the top-level of the CD image. Note that you'll need to have space on your USB stick for the live image plus your overlay plus any other data you want on the stick.
One very important note about using the "primary" persistent overlay for system changes is that due to the way it's currently implemented (as a LVM copy-on-write snapshot), every single change to it (writes AND deletes) subtracts from its free space, so it will eventually be "used up" and your USB stick will no longer boot. Because of these limitations, it is advisable to use the system-level persistence sparingly, for configuration changes and important security updates only. For a truly persistent write-many (vs write-once) overlay, use the --home-size-mb option to create a home directory filesystem image for personal files. Unlike the primary system overlay image, the home.img can be re-used and loop mounted outside of the liveusb environment.
The persistent overlay status may be queried by issuing this command on the live system:
dmsetup status
The returned value may look like this:
live-osimg.min: 0 8388608 snapshot 2352/2352 24
live-rw: 0 8388608 snapshot 42296/204800 176
where the fraction after 'snapshot' for the logical volume is that of 512-byte sectors consumed in the overlay.
From a running Live CD/DVD
If you are already running a live CD or DVD and want to convert that into a bootable USB stick, run the following command:
$ livecd-iso-to-disk /dev/live /dev/USBPARTITIONNAME
How to Boot a Live USB Drive
- Power off the computer.
- Plug the USB drive into a USB port.
- Remove all other portable media, such as CD, DVD, or floppy disks.
- Power on the computer.
- If the computer is configured to automatically boot off of the USB drive, you will see a screen that says "Automatic boot in 10 seconds..." with a countdown.
- If the computer starts to boot off the hard drive, you'll need to manually configure it to boot off the USB drive.
- Wait for a safe point to reboot safely.
- As the machine starts to reboot, watch carefully for instructions on which key to press (usually a function key or Escape) to enter the boot device selection menu, or "BIOS setup". Press and hold that key. If you miss the window of opportunity (often only a few seconds) then reboot and try again.
- Use the BIOS setup menu to put your USB drive first in the boot sequence. It might be listed as a hard drive rather than a removable drive. Each hardware manufacturer has a slightly different method for doing so. Use caution! Your computer could become unbootable or lose functionality if you change any other settings. Though these settings can be reverted, you'll need to remember what you changed in order to do so.
- Save the changes, exit, and the computer should boot the Live USB drive.
How to Make a bootable USB Drive to Install Fedora instead of using a physical DVD
Why would I want to make a USB device installer from the DVD instead of the LiveCD?
If you are installing to a netbook, or otherwise do not have an optical drive (or burner, or media), and you want the extra flexibility of using the regular DVD installer instead of the Live image, then this method will give a useful install medium. You are then free to customize package selection, choose which filesystem you prefer for your rootfs (ext3 OR ext4, btrfs, etc), and rescue mode is available.
Preparing the USB stick
The easiest setup method is to install and use unetbootin or Fedora's own livecd-iso-to-disk script from livecd-tools. Note that the liveusb-creator GUI, however, does not support putting the DVD installer on USB.
The manual setup method follows:
First, download the iso file Fedora-12-i386-DVD.iso from a Fedora mirror. Then loop mount the iso on a local mount point such as /mnt/tmp
# mount -o loop /path-to-iso/Fedora-12-i386-DVD.iso /mnt/tmp
Now plug in the USB stick and then copy the main iso file as well as the images directory from the /mnt/tmp/ directory to the root directory of the USB stick.
# cp /path-to-iso/Fedora-12-i386-DVD.iso /media/usbdisk/
# cp -r /mnt/tmp/images /media/usbdisk/
Next download the boot.iso file from a rawhide mirror from the development/i386/os/images/ directory on the mirror and store it on your computer's hard drive.
From your running 13 system (including an 13 livecd) make sure you have the livecd-tools package installed by doing:
yum install livecd-tools
Use the "mount" command to find the USB stick (e.g., /dev/sdb1) or look at /var/log/messages to find where the stick was mounted. Next umount the USB stick either from the desktop icon or using the umount command - but keep a note of where the USB stick is attached to the filesystem, e.g., /dev/sdb1
Now as root run:
注意：1、在images目录下有个boot.iso，不用额外下载。
2、livecd-iso-disk是个shell脚本，其内容可参考附件。
# livecd-iso-to-disk path-to/boot.iso /dev/sdb1
If the stick is not bootable, then refer to the information below to make it bootable, otherwise this command will fail.
You should now have a bootable USB stick which will run an 13 install. When you boot the stick, select a hard drive install and select the drive as /dev/sdb1 (or your USB device drive) and the path should be /
The remainder of the install should be the same as for using a DVD in an optical drive, but when you select options make sure that you select your disk partitioning carefully if you are doing custom partitioning and also make sure that the bootloader is installed on the correct drive - by default it will be installed on the USB stick so you will need to change it to the master boot record on the hard drive.
Errors and Solutions
liveusb-creator problems
- Try the liveusb-creator FAQ .
- Bugs are tracked in Trac - see e.g. existing tickets . Please open a new ticket if you encounter any problems that have not already been reported.
- The liveusb-creator mailing list has archives which may also be useful.
Partition isn't marked bootable!
If you get the following message, you need to mark the partition bootable.
$ livecd-iso-to-disk Fedora-<release>-Live-i686.iso /dev/sdb1
Partition isn't marked bootable!
You can mark the partition as bootable with
$ /sbin/parted /dev/sdb
(parted) toggle N boot
(parted) quit
Cleaning up to exit...
To mark the partition bootable,
$ parted /dev/sdb
GNU Parted 1.8.6
Using /dev/sdb
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print
Model: Imation Flash Drive (scsi)
Disk /dev/sdb: 1062MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 32.3kB 1062MB 1062MB primary fat16
(parted) toggle 1 boot
(parted) print
Model: Imation Flash Drive (scsi)
Disk /dev/sdb: 1062MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 32.3kB 1062MB 1062MB primary fat16 boot
(parted) quit
Information: Don't forget to update /etc/fstab, if necessary.
Partitions need a filesystem label!
If you get the following message, you need to label the partition.
$ livecd-iso-to-disk Fedora-<release>-Live-i686.iso /dev/sdb1
Need to have a filesystem label or UUID for your USB device
Label can be set with /sbin/dosfslabel
Cleaning up to exit...
To label the partition.
$ dosfslabel /dev/sdb1 usbdisk
Partition has different physical/logical endings!
If you get the following message, you may need to reformat the flash drive.
$ fdisk -l /dev/sdb
Disk /dev/sdb: 2029 MB, 2029518848 bytes
129 heads, 32 sectors/track, 960 cylinders
Units = cylinders of 4128 * 512 = 2113536 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 961 1981936 6 FAT16
Partition 1 has different physical/logical endings:
phys=(967, 128, 32) logical=(960, 31, 32)
MBR appears to be blank!
If your test boot reports a corrupted boot sector, or you get the following message, you need to install MBR.
$ livecd-iso-to-disk Fedora-<release>-Live-i686.iso /dev/sdb1
MBR appears to be blank.
You can add an MBR to this device with
Cleaning up to exit...
To install MBR,
$ cat /usr/share/syslinux/mbr.bin > /dev/sdb
SYSLINUX Boot Error!
If you were using the script on previous Red Hat or Fedora Release and getting following error message,
SYSLINUX 3.xx ... EBIOS Load error - Boot error
You may need to upgrade your syslinux to 3.50 or higher from Peter Anvin's SYSLINUX .
- http://www.kernel.org/pub/linux/utils/boot/syslinux/RPMS/i386/
Testing Live Image on USB
You can test your Live Image on USB using QEMU as shown in the screenshot below.
![[LINUX LIVE USB]How to Make a bootable USB Drive to Install Fedora instead of using a physical DVD_第1张图片](http://img.e-com-net.com/image/info5/eb86a76596dd4b2691b53f73ee99ada4.jpg)
For example, if your USB flash drive is on /dev/sdb1, you could type following command:
$ umount /dev/sdb1
$ qemu -hda /dev/sdb -m 256 -vga std
See also
Red Hat Magazine | I am Fedora, and so can you!
References
- http://www.redhat.com/archives/fedora-test-list/2007-May/msg00308.html
- http://www.redhat.com/archives/fedora-livecd-list/2007-April/msg00029.html
http://fedoraproject.org/wiki/FedoraLiveCD/USBHowTo#Command_Line_Method_-_Linux_only
附件：livecd-iso-to-disk脚本
#!/bin/bash
# Convert a live CD iso so that it's bootable off of a USB stick
# Copyright 2007 Red Hat, Inc.
# Jeremy Katz <[email protected]>
#
# overlay/persistence enhancements by Douglas McClendon <[email protected]>
# GPT+MBR hybrid enhancements by Stewart Adam <[email protected]>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
export PATH=/sbin:/usr/sbin:$PATH
usage() {
echo "$0 [--format] [--reset-mbr] [--noverify] [--overlay-size-mb <size>] [--home-size-mb <size>] [--unencrypted-home] [--skipcopy] <isopath> <usbstick device>"
exit 1
}
cleanup() {
sleep 2
[ -d "$CDMNT" ] && umount $CDMNT && rmdir $CDMNT
[ -d "$USBMNT" ] && umount $USBMNT && rmdir $USBMNT
}
exitclean() {
echo "Cleaning up to exit..."
cleanup
exit 1
}
getdisk() {
DEV=$1
if [[ "$DEV" =~ "/dev/loop*" ]]; then
device="$DEV"
return
fi
p=$(udevadm info -q path -n $DEV)
if [ -e /sys/$p/device ]; then
device=$(basename /sys/$p)
else
device=$(basename $(readlink -f /sys/$p/../))
fi
if [ ! -e /sys/block/$device -o ! -e /dev/$device ]; then
echo "Error finding block device of $DEV. Aborting!"
exitclean
fi
device="/dev/$device"
# FIXME: weird dev names could mess this up I guess
p=/dev/`basename $p`
partnum=${p##$device}
}
resetMBR() {
if [[ "$DEV" =~ "/dev/loop*" ]]; then
return
fi
getdisk $1
# if efi, we need to use the hybrid MBR
if [ -n "$efi" ];then
if [ -f /usr/lib/syslinux/gptmbr.bin ]; then
gptmbr='/usr/lib/syslinux/gptmbr.bin'
elif [ -f /usr/share/syslinux/gptmbr.bin ]; then
gptmbr='/usr/share/syslinux/gptmbr.bin'
else
echo "Could not find gptmbr.bin (syslinux)"
exitclean
fi
# our magic number is LBA-2, offset 16 - (512+512+16)/$bs
dd if=$device bs=16 skip=65 count=1 | cat $gptmbr - > $device
else
if [ -f /usr/lib/syslinux/mbr.bin ]; then
cat /usr/lib/syslinux/mbr.bin > $device
elif [ -f /usr/share/syslinux/mbr.bin ]; then
cat /usr/share/syslinux/mbr.bin > $device
else
echo "Could not find mbr.bin (syslinux)"
exitclean
fi
fi
}
checkMBR() {
if [[ "$DEV" =~ "/dev/loop*" ]]; then
return 0
fi
getdisk $1
bs=$(mktemp /tmp/bs.XXXXXX)
dd if=$device of=$bs bs=512 count=1 2>/dev/null || exit 2
mbrword=$(hexdump -n 2 $bs |head -n 1|awk {'print $2;'})
rm -f $bs
if [ "$mbrword" = "0000" ]; then
echo "MBR appears to be blank."
echo "Do you want to replace the MBR on this device?"
echo "Press Enter to continue or ctrl-c to abort"
read
resetMBR $1
fi
return 0
}
checkPartActive() {
dev=$1
getdisk $dev
# if we're installing to whole-disk and not a partition, then we
# don't need to worry about being active
if [ "$dev" = "$device" ]; then
return
fi
if [[ "$dev" =~ "/dev/loop*" ]]; then
return
fi
if [ "$(/sbin/fdisk -l $device 2>/dev/null |grep $dev |awk {'print $2;'})" != "*" ]; then
echo "Partition isn't marked bootable!"
echo "You can mark the partition as bootable with "
echo " # /sbin/parted $device"
echo " (parted) toggle N boot"
echo " (parted) quit"
exitclean
fi
}
createGPTLayout() {
dev=$1
getdisk $dev
echo "WARNING: THIS WILL DESTROY ANY DATA ON $device!!!"
echo "Press Enter to continue or ctrl-c to abort"
read
umount ${device}? &> /dev/null
/sbin/parted --script $device mklabel gpt
partinfo=$(/sbin/parted --script -m $device "unit b print" |grep ^$device:)
size=$(echo $partinfo |cut -d : -f 2 |sed -e 's/B$//')
/sbin/parted --script $device unit b mkpart '"EFI System Partition"' fat32 17408 $(($size - 17408)) set 1 boot on
USBDEV=${device}1
# Sometimes automount can be _really_ annoying.
echo "Waiting for devices to settle..."
/sbin/udevadm settle
sleep 5
umount $USBDEV &> /dev/null
/sbin/mkdosfs -n LIVE $USBDEV
USBLABEL="UUID=$(/sbin/blkid -s UUID -o value $USBDEV)"
}
createMSDOSLayout() {
dev=$1
getdisk $dev
echo "WARNING: THIS WILL DESTROY ANY DATA ON $device!!!"
echo "Press Enter to continue or ctrl-c to abort"
read
umount ${device}? &> /dev/null
/sbin/parted --script $device mklabel msdos
partinfo=$(/sbin/parted --script -m $device "unit b print" |grep ^$device:)
size=$(echo $partinfo |cut -d : -f 2 |sed -e 's/B$//')
/sbin/parted --script $device unit b mkpart primary fat32 17408 $(($size - 17408)) set 1 boot on
USBDEV=${device}1
# Sometimes automount can be _really_ annoying.
echo "Waiting for devices to settle..."
/sbin/udevadm settle
sleep 5
umount $USBDEV &> /dev/null
/sbin/mkdosfs -n LIVE $USBDEV
USBLABEL="UUID=$(/sbin/blkid -s UUID -o value $USBDEV)"
}
checkGPT() {
dev=$1
getdisk $dev
if [ "$(/sbin/fdisk -l $device 2>/dev/null |grep -c GPT)" -eq "0" ]; then
echo "EFI boot requires a GPT partition table."
echo "This can be done manually or you can run with --format"
exitclean
fi
partinfo=$(/sbin/parted --script -m $device "print" |grep ^$partnum:)
volname=$(echo $partinfo |cut -d : -f 6)
flags=$(echo $partinfo |cut -d : -f 7)
if [ "$volname" != "EFI System Partition" ]; then
echo "Partition name must be 'EFI System Partition'"
echo "This can be set in parted or you can run with --reset-mbr"
exitclean
fi
if [ "$(echo $flags |grep -c boot)" = "0" ]; then
echo "Partition isn't marked bootable!"
echo "You can mark the partition as bootable with "
echo " # /sbin/parted $device"
echo " (parted) toggle N boot"
echo " (parted) quit"
exitclean
fi
}
checkFilesystem() {
dev=$1
USBFS=$(/sbin/blkid -s TYPE -o value $dev)
if [ "$USBFS" != "vfat" -a "$USBFS" != "msdos" -a "$USBFS" != "ext2" -a "$USBFS" != "ext3" ]; then
echo "USB filesystem must be vfat or ext[23]"
exitclean
fi
USBLABEL=$(/sbin/blkid -s UUID -o value $dev)
if [ -n "$USBLABEL" ]; then
USBLABEL="UUID=$USBLABEL" ;
else
USBLABEL=$(/sbin/blkid -s LABEL -o value $dev)
if [ -n "$USBLABEL" ]; then
USBLABEL="LABEL=$USBLABEL"
else
echo "Need to have a filesystem label or UUID for your USB device"
if [ "$USBFS" = "vfat" -o "$USBFS" = "msdos" ]; then
echo "Label can be set with /sbin/dosfslabel"
elif [ "$USBFS" = "ext2" -o "$USBFS" = "ext3" ]; then
echo "Label can be set with /sbin/e2label"
fi
exitclean
fi
fi
if [ "$USBFS" = "vfat" -o "$USBFS" = "msdos" ]; then
mountopts="-o shortname=winnt,umask=0077"
fi
}
checkSyslinuxVersion() {
if [ ! -x /usr/bin/syslinux ]; then
echo "You need to have syslinux installed to run this script"
exit 1
fi
if ! syslinux 2>&1 | grep -qe -d; then
SYSLINUXPATH=""
elif [ -n "$multi" ]; then
SYSLINUXPATH="$LIVEOS/syslinux"
else
SYSLINUXPATH="syslinux"
fi
}
checkMounted() {
dev=$1
if grep -q "^$dev " /proc/mounts ; then
echo "$dev is mounted, please unmount for safety"
exitclean
fi
if grep -q "^$dev " /proc/swaps; then
echo "$dev is in use as a swap device, please disable swap"
exitclean
fi
}
checkint() {
if ! test $1 -gt 0 2>/dev/null ; then
usage
fi
}
if [ $(id -u) != 0 ]; then
echo "You need to be root to run this script"
exit 1
fi
detectisotype() {
if [ -e $CDMNT/LiveOS/squashfs.img ]; then
isotype=live
return
fi
if [ -e $CDMNT/images/install.img ]; then
isotype=installer
return
fi
echo "ERROR: $ISO does not appear to be a Live image or DVD installer."
exitclean
}
cryptedhome=1
keephome=1
homesizemb=0
swapsizemb=0
overlaysizemb=0
isotype=
LIVEOS=LiveOS
HOMEFILE="home.img"
while [ $# -gt 2 ]; do
case $1 in
--overlay-size-mb)
checkint $2
overlaysizemb=$2
shift
;;
--home-size-mb)
checkint $2
homesizemb=$2
shift
;;
--swap-size-mb)
checkint $2
swapsizemb=$2
shift
;;
--crypted-home)
cryptedhome=1
;;
--unencrypted-home)
cryptedhome=""
;;
--delete-home)
keephome=""
;;
--noverify)
noverify=1
;;
--reset-mbr|--resetmbr)
resetmbr=1
;;
--efi|--mactel)
efi=1
;;
--format)
format=1
;;
--skipcopy)
skipcopy=1
;;
--xo)
xo=1
skipcompress=1
;;
--xo-no-home)
xonohome=1
;;
--compress)
skipcompress=""
;;
--skipcompress)
skipcompress=1
;;
--extra-kernel-args)
kernelargs=$2
shift
;;
--force)
force=1
;;
--livedir)
LIVEOS=$2
shift
;;
--multi)
multi=1
;;
*)
echo "invalid arg -- $1"
usage
;;
esac
shift
done
ISO=$(readlink -f "$1")
USBDEV=$(readlink -f "$2")
if [ -z "$ISO" ]; then
usage
fi
if [ ! -b "$ISO" -a ! -f "$ISO" ]; then
usage
fi
# FIXME: If --format is given, we shouldn't care and just use /dev/foo1
if [ -z "$USBDEV" -o ! -b "$USBDEV" ]; then
usage
fi
if [ -z "$noverify" ]; then
# verify the image
echo "Verifying image..."
checkisomd5 --verbose "$ISO"
if [ $? -ne 0 ]; then
echo "Are you SURE you want to continue?"
echo "Press Enter to continue or ctrl-c to abort"
read
fi
fi
# do some basic sanity checks.
checkMounted $USBDEV
if [ -n "$format" ];then
# checks for a valid filesystem
if [ -n "$efi" ];then
createGPTLayout $USBDEV
else
createMSDOSLayout $USBDEV
fi
fi
checkFilesystem $USBDEV
if [ -n "$efi" ]; then
checkGPT $USBDEV
fi
checkSyslinuxVersion
# Because we can't set boot flag for EFI Protective on msdos partition tables
[ -z "$efi" ] && checkPartActive $USBDEV
[ -n "$resetmbr" ] && resetMBR $USBDEV
checkMBR $USBDEV
if [ "$overlaysizemb" -gt 0 -a "$USBFS" = "vfat" ]; then
if [ "$overlaysizemb" -gt 2047 ]; then
echo "Can't have an overlay of 2048MB or greater on VFAT"
exitclean
fi
fi
if [ "$homesizemb" -gt 0 -a "$USBFS" = "vfat" ]; then
if [ "$homesizemb" -gt 2047 ]; then
echo "Can't have a home overlay greater than 2048MB on VFAT"
exitclean
fi
fi
if [ "$swapsizemb" -gt 0 -a "$USBFS" = "vfat" ]; then
if [ "$swapsizemb" -gt 2047 ]; then
echo "Can't have a swap file greater than 2048MB on VFAT"
exitclean
fi
fi
# FIXME: would be better if we had better mountpoints
CDMNT=$(mktemp -d /media/cdtmp.XXXXXX)
mount -o loop,ro "$ISO" $CDMNT || exitclean
USBMNT=$(mktemp -d /media/usbdev.XXXXXX)
mount $mountopts $USBDEV $USBMNT || exitclean
trap exitclean SIGINT SIGTERM
detectisotype
if [ -f "$USBMNT/$LIVEOS/$HOMEFILE" -a -n "$keephome" -a "$homesizemb" -gt 0 ]; then
echo "ERROR: Requested keeping existing /home and specified a size for /home"
echo "Please either don't specify a size or specify --delete-home"
exitclean
fi
if [ -n "$efi" -a ! -d $CDMNT/EFI/boot ]; then
echo "ERROR: This live image does not support EFI booting"
exitclean
fi
# let's try to make sure there's enough room on the stick
if [ -d $CDMNT/LiveOS ]; then
check=$CDMNT/LiveOS
else
check=$CDMNT
fi
if [ -d $USBMNT/$LIVEOS ]; then
tbd=$(du -s -B 1M $USBMNT/$LIVEOS | awk {'print $1;'})
[ -f $USBMNT/$LIVEOS/$HOMEFILE ] && homesz=$(du -s -B 1M $USBMNT/$LIVEOS/$HOMEFILE | awk {'print $1;'})
[ -n "$homesz" -a -n "$keephome" ] && tbd=$(($tbd - $homesz))
else
tbd=0
fi
livesize=$(du -s -B 1M $check | awk {'print $1;'})
if [ -n "$skipcompress" ]; then
if [ -e $CDMNT/LiveOS/squashfs.img ]; then
if mount -o loop $CDMNT/LiveOS/squashfs.img $CDMNT; then
livesize=$(du -s -B 1M $CDMNT/LiveOS/ext3fs.img | awk {'print $1;'})
umount $CDMNT
else
echo "WARNING: --skipcompress or --xo was specified but the currently"
echo "running kernel can not mount the squashfs from the ISO file to extract"
echo "it. The compressed squashfs will be copied to the USB stick."
skipcompress=""
fi
fi
fi
free=$(df -B1M $USBDEV |tail -n 1 |awk {'print $4;'})
if [ "$isotype" = "live" ]; then
tba=$(($overlaysizemb + $homesizemb + $livesize + $swapsizemb))
if [ $tba -gt $(($free + $tbd)) ]; then
echo "Unable to fit live image + overlay on available space on USB stick"
echo "+ Size of live image: $livesize"
[ "$overlaysizemb" -gt 0 ] && echo "+ Overlay size: $overlaysizemb"
[ "$homesizemb" -gt 0 ] && echo "+ Home overlay size: $homesizemb"
[ "$swapsizemb" -gt 0 ] && echo "+ Swap overlay size: $swapsizemb"
echo "---------------------------"
echo "= Requested: $tba"
echo "- Available: $(($free + $tbd))"
echo "---------------------------"
echo "= To fit, free or decrease requested size total by: $(($tba - $free - $tbd))"
exitclean
fi
fi
# Verify available space for DVD installer
if [ "$isotype" = "installer" ]; then
isosize=$(du -s -B 1M $ISO | awk {'print $1;'})
installimgsize=$(du -s -B 1M $CDMNT/images/install.img | awk {'print $1;'})
tbd=0
if [ -e $USBMNT/images/install.img ]; then
tbd=$(du -s -B 1M $USBMNT/images/install.img | awk {'print $1;'})
fi
if [ -e $USBMNT/$(basename $ISO) ]; then
tbd=$(($tbd + $(du -s -B 1M $USBMNT/$(basename $ISO) | awk {'print $1;'})))
fi
echo "Size of DVD image: $isosize"
echo "Size of install.img: $installimgsize"
echo "Available space: $(($free + $tbd))"
if [ $(($isosize + $installimgsize)) -gt $(($free + $tbd)) ]; then
echo "ERROR: Unable to fit DVD image + install.img on available space on USB stick"
exitclean
fi
fi
if [ -z "$skipcopy" ] && [ "$isotype" = "live" ]; then
if [ -d $USBMNT/$LIVEOS -a -z "$force" ]; then
echo "Already set up as live image."
if [ -z "$keephome" -a -e $USBMNT/$LIVEOS/$HOMEFILE ]; then
echo "WARNING: Persistent /home will be deleted!!!"
echo "Press Enter to continue or ctrl-c to abort"
read
else
echo "Deleting old OS in fifteen seconds..."
sleep 15
[ -e "$USBMNT/$LIVEOS/$HOMEFILE" -a -n "$keephome" ] && mv $USBMNT/$LIVEOS/$HOMEFILE $USBMNT/$HOMEFILE
fi
rm -rf $USBMNT/$LIVEOS
fi
fi
# Bootloader is always reconfigured, so keep these out of the if skipcopy stuff.
[ ! -d $USBMNT/$SYSLINUXPATH ] && mkdir -p $USBMNT/$SYSLINUXPATH
[ -n "$efi" -a ! -d $USBMNT/EFI/boot ] && mkdir -p $USBMNT/EFI/boot
# Live image copy
if [ -z "$skipcopy" ] && [ "$isotype" = "live" ]; then
echo "Copying live image to USB stick"
[ ! -d $USBMNT/$LIVEOS ] && mkdir $USBMNT/$LIVEOS
[ -n "$keephome" -a -f "$USBMNT/$HOMEFILE" ] && mv $USBMNT/$HOMEFILE $USBMNT/$LIVEOS/$HOMEFILE
if [ -n "$skipcompress" -a -f $CDMNT/LiveOS/squashfs.img ]; then
mount -o loop $CDMNT/LiveOS/squashfs.img $CDMNT || exitclean
cp $CDMNT/LiveOS/ext3fs.img $USBMNT/$LIVEOS/ext3fs.img || (umount $CDMNT ; exitclean)
umount $CDMNT
elif [ -f $CDMNT/LiveOS/squashfs.img ]; then
cp $CDMNT/LiveOS/squashfs.img $USBMNT/$LIVEOS/squashfs.img || exitclean
elif [ -f $CDMNT/LiveOS/ext3fs.img ]; then
cp $CDMNT/LiveOS/ext3fs.img $USBMNT/$LIVEOS/ext3fs.img || exitclean
fi
if [ -f $CDMNT/LiveOS/osmin.img ]; then
cp $CDMNT/LiveOS/osmin.img $USBMNT/$LIVEOS/osmin.img || exitclean
fi
fi
# DVD installer copy
if [ "$isotype" = "installer" ] && [ -z "$skipcopy" ]; then
echo "Copying DVD image to USB stick"
mkdir -p $USBMNT/images/
cp $CDMNT/images/install.img $USBMNT/images/install.img || exitclean
cp $ISO $USBMNT/
fi
cp $CDMNT/isolinux/* $USBMNT/$SYSLINUXPATH
BOOTCONFIG=$USBMNT/$SYSLINUXPATH/isolinux.cfg
# Set this to nothing so sed doesn't care
BOOTCONFIG_EFI=
if [ -n "$efi" ];then
cp $CDMNT/EFI/boot/* $USBMNT/EFI/boot
# this is a little ugly, but it gets the "interesting" named config file
BOOTCONFIG_EFI=$USBMNT/EFI/boot/boot?*.conf
rm -f $USBMNT/EFI/boot/grub.conf
fi
echo "Updating boot config file"
# adjust label and fstype
sed -i -e "s/CDLABEL=[^ ]*/$USBLABEL/" -e "s/rootfstype=[^ ]*/rootfstype=$USBFS/" $BOOTCONFIG $BOOTCONFIG_EFI
if [ -n "$kernelargs" ]; then sed -i -e "s/liveimg/liveimg ${kernelargs}/" $BOOTCONFIG $BOOTCONFIG_EFI ; fi
if [ "$LIVEOS" != "LiveOS" ]; then sed -i -e "s;liveimg;liveimg live_dir=$LIVEOS;" $BOOTCONFIG $BOOTCONFIG_EFI ; fi
# DVD Installer
if [ "$isotype" = "installer" ]; then
sed -i -e "s;initrd=initrd.img;initrd=initrd.img repo=hd:$USBLABEL:/;g" $BOOTCONFIG $BOOTCONFIG_EFI
sed -i -e "s;stage2=/S*;;g" $BOOTCONFIG $BOOTCONFIG_EFI
fi
if [ "$overlaysizemb" -gt 0 ]; then
echo "Initializing persistent overlay file"
OVERFILE="overlay-$( /sbin/blkid -s LABEL -o value $USBDEV )-$( /sbin/blkid -s UUID -o value $USBDEV )"
if [ "$USBFS" = "vfat" ]; then
# vfat can't handle sparse files
dd if=/dev/zero of=$USBMNT/$LIVEOS/$OVERFILE count=$overlaysizemb bs=1M
else
dd if=/dev/null of=$USBMNT/$LIVEOS/$OVERFILE count=1 bs=1M seek=$overlaysizemb
fi
sed -i -e "s/liveimg/liveimg overlay=${USBLABEL}/" $BOOTCONFIG $BOOTCONFIG_EFI
sed -i -e "s// ro/ // rw/ /" $BOOTCONFIG $BOOTCONFIG_EFI
fi
if [ "$swapsizemb" -gt 0 ]; then
echo "Initializing swap file"
dd if=/dev/zero of=$USBMNT/$LIVEOS/swap.img count=$swapsizemb bs=1M
mkswap -f $USBMNT/$LIVEOS/swap.img
fi
if [ "$homesizemb" -gt 0 ]; then
echo "Initializing persistent /home"
homesource=/dev/zero
[ -n "$cryptedhome" ] && homesource=/dev/urandom
if [ "$USBFS" = "vfat" ]; then
# vfat can't handle sparse files
dd if=${homesource} of=$USBMNT/$LIVEOS/$HOMEFILE count=$homesizemb bs=1M
else
dd if=/dev/null of=$USBMNT/$LIVEOS/$HOMEFILE count=1 bs=1M seek=$homesizemb
fi
if [ -n "$cryptedhome" ]; then
loop=$(losetup -f)
losetup $loop $USBMNT/$LIVEOS/$HOMEFILE
setupworked=1
until [ ${setupworked} == 0 ]; do
echo "Encrypting persistent /home"
cryptsetup luksFormat -y -q $loop
setupworked=$?
done
setupworked=1
until [ ${setupworked} == 0 ]; do
echo "Please enter the password again to unlock the device"
cryptsetup luksOpen $loop EncHomeFoo
setupworked=$?
done
mke2fs -j /dev/mapper/EncHomeFoo
tune2fs -c0 -i0 -ouser_xattr,acl /dev/mapper/EncHomeFoo
sleep 2
cryptsetup luksClose EncHomeFoo
losetup -d $loop
else
echo "Formatting unencrypted /home"
mke2fs -F -j $USBMNT/$LIVEOS/$HOMEFILE
tune2fs -c0 -i0 -ouser_xattr,acl $USBMNT/$LIVEOS/$HOMEFILE
fi
fi
# create the forth files for booting on the XO if requested
# we'd do this unconditionally, but you have to have a kernel that will
# boot on the XO anyway.
if [ -n "$xo" ]; then
echo "Setting up /boot/olpc.fth file"
args=$(egrep "^[ ]*append" $USBMNT/$SYSLINUXPATH/isolinux.cfg |head -n1 |sed -e 's/.*initrd=[^ ]*//')
if [ -z "$xonohome" -a ! -f $USBMNT/$LIVEOS/$HOMEFILE ]; then
args="$args persistenthome=mtd0"
fi
args="$args reset_overlay"
xosyspath=$(echo $SYSLINUXPATH | sed -e 's;/;//;')
if [ ! -d $USBMNT/boot ]; then mkdir -p $USBMNT/boot ; fi
cat > $USBMNT/boot/olpc.fth <<EOF
/ Boot script for USB boot
hex rom-pa fffc7 + 4 /$number drop h# 2e19 < [if]
patch 2drop erase claim-params
: high-ramdisk ( -- )
cv-load-ramdisk
h# 22c +lp l@ 1+ memory-limit umin /ramdisk - ffff.f000 and ( new-ramdisk-adr )
ramdisk-adr over /ramdisk move ( new-ramdisk-adr )
to ramdisk-adr
;
' high-ramdisk to load-ramdisk
[then]
: set-bootpath-dev ( -- )
" /chosen" find-package if ( phandle )
" bootpath" rot get-package-property 0= if ( propval$ )
get-encoded-string ( bootpath$ )
[char] / left-parse-string 2nip ( dn$ )
dn-buf place ( )
then
then
" /sd" dn-buf count sindex 0>= if
" sd:"
else
" u:"
then
" BOOTPATHDEV" /$set-macro
;
set-bootpath-dev
" $args" to boot-file
" /${BOOTPATHDEV}$xosyspath/initrd0.img" expand$ to ramdisk
" /${BOOTPATHDEV}$xosyspath/vmlinuz0" expand$ to boot-device
unfreeze
boot
EOF
fi
if [ -z "$multi" ]; then
echo "Installing boot loader"
if [ -n "$efi" ]; then
# replace the ia32 hack
if [ -f "$USBMNT/EFI/boot/boot.conf" ]; then cp -f $USBMNT/EFI/boot/bootia32.conf $USBMNT/EFI/boot/boot.conf ; fi
fi
# this is a bit of a kludge, but syslinux doesn't guarantee the API for its com32 modules :/
if [ -f $USBMNT/$SYSLINUXPATH/vesamenu.c32 -a -f /usr/share/syslinux/vesamenu.c32 ]; then
cp /usr/share/syslinux/vesamenu.c32 $USBMNT/$SYSLINUXPATH/vesamenu.c32
elif [ -f $USBMNT/$SYSLINUXPATH/vesamenu.c32 -a -f /usr/lib/syslinux/vesamenu.c32 ]; then
cp /usr/lib/syslinux/vesamenu.c32 $USBMNT/$SYSLINUXPATH/vesamenu.c32
elif [ -f $USBMNT/$SYSLINUXPATH/menu.c32 -a -f /usr/share/syslinux/menu.c32 ]; then
cp /usr/share/syslinux/menu.c32 $USBMNT/$SYSLINUXPATH/menu.c32
elif [ -f $USBMNT/$SYSLINUXPATH/menu.c32 -a -f /usr/lib/syslinux/menu.c32 ]; then
cp /usr/lib/syslinux/menu.c32 $USBMNT/$SYSLINUXPATH/menu.c32
fi
if [ "$USBFS" = "vfat" -o "$USBFS" = "msdos" ]; then
# syslinux expects the config to be named syslinux.cfg
# and has to run with the file system unmounted
mv $USBMNT/$SYSLINUXPATH/isolinux.cfg $USBMNT/$SYSLINUXPATH/syslinux.cfg
# deal with mtools complaining about ldlinux.sys
if [ -f $USBMNT/$SYSLINUXPATH/ldlinux.sys ] ; then rm -f $USBMNT/$SYSLINUXPATH/ldlinux.sys ; fi
cleanup
if [ -n "$SYSLINUXPATH" ]; then
syslinux -d $SYSLINUXPATH $USBDEV
else
syslinux $USBDEV
fi
elif [ "$USBFS" = "ext2" -o "$USBFS" = "ext3" ]; then
# extlinux expects the config to be named extlinux.conf
# and has to be run with the file system mounted
mv $USBMNT/$SYSLINUXPATH/isolinux.cfg $USBMNT/$SYSLINUXPATH/extlinux.conf
extlinux -i $USBMNT/$SYSLINUXPATH
chattr -i $USBMNT/$SYSLINUXPATH/extlinux.sys
cleanup
fi
else
# we need to do some more config file tweaks for multi-image mode
sed -i -e "s;kernel vm;kernel /$LIVEOS/syslinux/vm;" $USBMNT/$SYSLINUXPATH/isolinux.cfg
sed -i -e "s;initrd=i;initrd=/$LIVEOS/syslinux/i;" $USBMNT/$SYSLINUXPATH/isolinux.cfg
mv $USBMNT/$SYSLINUXPATH/isolinux.cfg $USBMNT/$SYSLINUXPATH/syslinux.cfg
cleanup
fi
echo "USB stick set up as live image!"