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In this example I used /dev/sdc for the name of the device which is what was found in the results of step 2. Now open the Disks application from the Dash and check again to make sure that the device name of your 8GB pendrive is the same as what you got from running the command: sudo fdisk -l.Ĭreate a partition table on the disk of type msdos, sometimes known as Master Boot Record (MBR). If you see something like 7864 MB (8GB) in the output (see the example output above), then that is your 8GB USB flash drive. I/O size (minimum/optimal): 512 bytes / 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes Search the results of the command for output that looks like this: Disk /dev/sdc: 7864 MB, 7864320000 bytesģ0 heads, 33 sectors/track, 15515 cylinders, total 15360000 sectors Remove all of your USB devices except for the 8GB USB flash drive that you want to reformat, so you won't get confused about the device name of the USB flash drive later on. As a side remark, it's kind of annoying to use dd instead of a GUI program like Startup Disk Creator, but dd is the only program I have found that works for writing the Ubuntu Minimal CD to a bootable USB flash drive. I reformatted 2 USB flash drives with the following steps after writing Ubuntu ISOs to them with dd. The results of these steps are reproducible.
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#How to make a usb drive bootable for ubuntu iso#
In the following steps I am assuming as an example that you want to restore an 8GB USB flash drive to usable condition after writing the Ubuntu iso to it using dd, although of course the exact size of the USB flash drive is not important.