Difference between revisions of "Linux USB"
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mkdosfs -F 32 -I /dev/'''sdb1''' #format device to fat32 | mkdosfs -F 32 -I /dev/'''sdb1''' #format device to fat32 | ||
= | = Make bootable USB from .iso image= | ||
sudo umount /dev/sdb | == Copy image to USB == | ||
[http://en.wikipedia.org/wiki/Dd_%28Unix%29 DD] can copy a whole image to the desired device but only a hybrid ISOs image will boot. '''of=''' (output file) value needs pointing to USB 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 | ||
== 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 | Starting in version 3.72, [http://www.syslinux.org/wiki/index.php/ISOLINUX 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. Hybrid images are special as in addition to the normal CD-based ISO9660 filesystem, they also contain a valid-looking DOS-style partition table. The '''isohybrid'' contains MBR code which has to match the version of the ISOLINUX file isolinux.bin. Therefore always use the program from the same SYSLINUX installation which .iso has been created by <tt>mkisofs, genisoimage, or xorriso</tt> and then treat it by: | ||
isohybrid | apt-cache pkgnames syslinux | grep -A 1 Version #check isolinux version | ||
isohybrid isolinuximage.iso | |||
It is worth to mention that the above operation will append necessary information to the image file therefore the check-sum will change. | |||
= Mount .iso = | = Mount .iso = | ||
Revision as of 11:41, 29 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
df -h #find your usb device lsblk #another way to find your device 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
Make bootable USB from .iso image
Copy image to USB
DD can copy a whole image to the desired device but only a hybrid ISOs image will boot. of= (output file) value needs pointing to USB 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. Hybrid images are special as in addition to the normal CD-based ISO9660 filesystem, they also contain a valid-looking DOS-style partition table. The 'isohybrid contains MBR code which has to match the version of the ISOLINUX file isolinux.bin. Therefore always use the program from the same SYSLINUX installation which .iso has been created by mkisofs, genisoimage, or xorriso and then treat it by:
apt-cache pkgnames syslinux | grep -A 1 Version #check isolinux version isohybrid isolinuximage.iso
It is worth to mention that the above operation 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