Eth0 : Duplex Settings

Using Ethtool we can set it as follows.

# ethtool -s eth0 speed 100 duplex full
# ethtool -s eth0 speed 10 duplex half
mii-tool eth0
ethtool eth0

yum install ethtool net-tools
up2date ethtool net-tools
apt-get install ethtool net-tools