Hello friends,
Iam using Open suse 11.1 with gnome on my computer.I have selected "Ext3" file system when installing suse.In windows,we have utiitys like

1.scan disk
2.disk defragmentation


im sure that we have such programs in linux also..

can any one suggest me a program which can serve my purposes(Like scan disk and defragmentation)...

Thanks in advance..