Difference between revisions of "Linux USB"
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= Copy .iso on USB stick to make bootable = | = Copy .iso on USB stick to make bootable = | ||
This works only with hybrid ISOs images. The resulting USB stick will act exactly like a liveCD/DVD. '''of=''' (output file) value needs to be a hard drive (eg. sdb) not a partition (eg. sdb1). | This works only with hybrid ISOs images. The resulting USB stick will act exactly like a liveCD/DVD. '''of=''' (output file) value needs to be a hard drive (eg. sdb) not a partition (eg. sdb1). | ||
sudo umount /dev/sdb | |||
sudo dd if=image.iso of=/dev/'''sdb''' | sudo dd if=image.iso of=/dev/'''sdb''' | ||
sync | sync |
Revision as of 16:41, 28 June 2014
Set bootable flag on USB drive
$ sudo fdisk /dev/sdb #/dev device needs to be a hard drive(sdb) not a partition(sdb1) Command (m for help): a Partition number (1-4): 1 Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks. $ sudo fdisk -l <--- output omitted -----> Disk /dev/sdb: 2002 MB, 2002747392 bytes 255 heads, 63 sectors/track, 243 cylinders, total 3911616 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: 0x00000000 Device Boot Start End Blocks Id System /dev/sdb1 * 63 3911615 1955776+ c W95 FAT32 (LBA)
Format USB stick
sudo fdisk -l #find out your usb device df umount /dev/sdb1 mkfs.vfat /dev/sdb1 #create fat32 mkfs.ext3 /dev/sdb1 #create ext3 mkdosfs -F 32 -I /dev/sdb1 #format device to fat32
Copy .iso on USB stick to make bootable
This works only with hybrid ISOs images. The resulting USB stick will act exactly like a liveCD/DVD. of= (output file) value needs to be a hard drive (eg. sdb) not a partition (eg. sdb1).
sudo umount /dev/sdb sudo dd if=image.iso of=/dev/sdb sync
- Convert .iso to hybrid image
Starting in version 3.72, ISOLINUX supports a "hybrid mode" which can be booted from either CD-ROM or from a device which BIOS considers a hard disk or ZIP disk, e.g. a USB key or similar. To enable this mode, the .iso image needs to be postprecessed with this utility. Hybrid images are special as in addition to the normal CD-based ISO9660 filesystem, they also contain a valid-looking DOS-style partition table. Note that old .iso images prior the supported version will not work.
isohybrid image.iso
This will append necessary information to the image file therefore the check-sum will change.
Mount .iso
sudo mkdir /mnt/isoimage sudo mount -o loop -t iso9660 image.iso /mnt/isoimage/
Resources
- Isohybrid Wiki