You can also check it by df -T

Sample output:

Filesystem    Type   1K-blocks      Used Available Use% Mounted on

/dev/hdb1     ext3    19228276  14737848   3513680  81% / 

tmpfs        tmpfs      383960         4    383956   1% /dev/shm

You can also try df -hT

From man df:

-h, --human-readable

              print sizes in human readable format (e.g., 1K 234M 2G)

-T, --print-type

              print file system type