[Linux] How to Create a Fat32 Filesystem on the USB Flash Drive

Open a terminal and type sudo su

Must unmount the USB Flash Drive first!!!
Type umount /dev/sdx1 [to unmount the mounted partition] (replacing x with your actual usb device)

Next:
Type mkfs.vfat -F 32 -n MULTIBOOT /dev/sdx1 (to format the partition as fat32)