Defragmenting disks under Linux

[Chris Jones]

As a long-time user of various Windoze "distro's" (from win3.11 all the
way to Win2k), I have come to recognise that one needs to regularly
de-frag hard-disks under windoze. 

My question is:-
Is linux susceptible to fragmentation?

If so, then what tool is best to cure it, and keep it cured?

--  
>From Chris Jones
mailto:linux at stow-jones.co.uk
web: http://www.stow-jones.co.uk/