Writing an IMG File to Flash media
If you selected to download a "Boot only USB for network & internet installs" .img file, you can write the image file to a flash card or removable USB drive using the built-in dd command line utility on a BSD or Linux command system. On a FreeBSD system, the superuser can use this command to write the specified image in the current directory to the first plugged in USB device:
dd if=PCBSD8.1-x86-USB-bootonly.img of=/dev/da0 bs=5k 81920+0 records in 81920+0 records out 419430400 bytes transferred in 194.226042 secs (2159496 bytes/sec)
When using the dd command:
- if= refers to the input file; in our case, the name of the file to be written
- of= refers to the output file; in our case, the device name of the flash card or removable USB drive. You may have to increment the number in the name if it is not the first USB device. On Linux, use "/dev/sda" to refer to the first USB device.
- bs= refers to the block size
To burn the .img file on a Windows system, you can use ImgBurn--simply select the .img file as the source and the USB drive as the destination. Beginning with Windows 7 Beta 1, you can burn an image without additional software by right-clicking the file name and selecting "Burn disk image" from the menu.