If you want to set the block size to 32 then you specify 32 as the value to the -F command line option. You can use mkdosfs, mkfs.msdos, mkfs.dos, mkfs.fat or mkfs.vfat all of which does the same thing. There are several different (legacy) names to the tools, which are all available by symlinks. There are several different commands, which are all symlinks to mkfs.fat command or utility. Use the fdisk -l command, which will print out all the devices identified by the machine. Note: You can use the fdisk command to find the device. We will assume that the usb is loaded at /dev/sdc for the examples below. You also will need to know the device name for the USB drive. In order for the system to format the drive, the system should be able to identify the device correctly. The mkfs utility takes a command line option –type (or -t) to specify the file system type to be used. The mkfs utility is only a front-end to the underlying file system builders, which means you can only use those utilities directly as well. If it is not installed, then you will need to install this first using your package manager installation process ( apt-get, pacman, emerge etc).
Most Linux distros should have this installed by default. The support for the FAT file systems are provided by the dosfstools package. This utility supports many different file systems, including the FAT ones. You can use this to create file systems on any disk, drive or partitions on the system. The command that is used to create a new file system is called mkfs in Linux. We will see how you can format an usb drive in any file system format from the Linux command line. These may be either FAT16, FAT32 or NTFS file system formats. This means you will need to format your USB drives in formats that is understood by MS Windows.
Unfortunately, there are still enough Windows machines out in the wild that reads only specific file systems in formats such as FAT32 or NTFS. One of the reasons of having to use an usb drive is to transfer files between different machines, usually with different operating systems.
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