How to tell what file system type I have?

[joe at actionline.com]

> Hi Joe,
>
> # df -h
>
> # fdisk -l
>
> That information should tell you what your file system is?

Here are the results:

[joe at localhost ~]$ df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1              12G  5.7G  5.6G  51% /
tmpfs                 473M     0  473M   0% /dev/shm
/dev/sda6             168G   23G  146G  14% /home
[joe at localhost ~]$ fdisk -l
[joe at localhost ~]$

I'm trying to find out if the file system is ext3 or ext4.