why ubantu 10 desktop x64 does not have Ethernet card speed/mode half duplex/duplex setting option

[J]

On Thu, Nov 4, 2010 at 10:09, Ashutosh Rai <ashurai123 at gmail.com> wrote:
> Hi
>
>        I am facing ethernet card speed and mode(duplex/half duplex ) setting
> because network manager provided by ubantu 10 desktop edition does not have
> the option of ethernet speed and mode (Duplex, half duplex ) setting option,
> if u guys know any alternative graphical network manager which have ethernet
> speed and mode setting then pls tell me asap.

There are no GUI network managers I know of that allow that fine
grained control...

that's what ethtool is for...

Open a terminal and run 'ethtool -h' or 'man ethtool' for more info.