metulburr@mint ~ $ df -T
Filesystem    Type   1K-blocks      Used Available Use% Mounted on
/dev/sda7     ext4   213741808  14699412 188184928   8% /
none      devtmpfs     4077548       752   4076796   1% /dev
none         tmpfs     4088364       216   4088148   1% /dev/shm
none         tmpfs     4088364       356   4088008   1% /var/run
none         tmpfs     4088364         0   4088364   0% /var/lock
/dev/sdf1     vfat     7794800   7015556    779244  91% /media/kingston
/dev/sdb1     vfat    15538848   3450160  12088688  23% /media/sd card
/dev/sdg1  fuseblk   2930232316 1494150920 1436081396  51% /media/3TB Hard Drive
/dev/sdb1     vfat    15538848   3450160  12088688  23% /home/metulburr/Desktop/tmp
metulburr@mint ~ $ sudo umount /dev/sdb1 ~/Desktop/tmp
[sudo] password for metulburr: 
umount: /home/metulburr/Desktop/tmp: not mounted
metulburr@mint ~ $