Many times it happens that your
pen drive or memory cards does not formatted from file manager so you
have to format it from terminal. In this tutorial, it is shown that
how to format pen drive or any other hard-disk or memory card from
terminal using commands in Ubuntu.
This text gives you a complete
idea of how to format pen drive from terminal and which commands you
have to type.
I also attached the screenshots
of this commands from terminal window step by step.
First of all unmount your pen drive
using the following command.
N : number of drive it may be 1 ,2,3,4 etc
sudo umount /dev/sdbN
Then enter the following command to format your pen drive with
FAT32 partition.
sudo mkfs.vfat -n 'Ubuntu'
-I /dev/sdbN
where Ubuntu is the name of your disk