How can I format a flash drive using terminal emulator?

I have a Huawei u8160 running Cyanogenmod 7.2. I've recently installed the usb host package and some time then I successfully activated the usb host mode. after that I needed to format a flash drive using ONLY my phone. my phone doesn't recognize thumb drives, but I mount them on /mnt/sdcard/data folder. So I wanted to know if there's any command in the terminal emulator that can format a usb drive. **NOTE:** I've already tried "mkfs" command it doesn't exist,I won't accept answers telling me to format it on my PC.