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I want to change my duplex setting to 10Mbps full duplex in Ubuntu 12.04. The same is working fine for temporary change through ethtool eth0 cmd. But when I try to make a permanent change it is not working while I reboot system I am getting no network found and finally after certain try Ubuntu starts without full network support and in which I cannot connect to internet. Below is the code I used for changing duplex speed and link which I followed for making changes a link!

to make it permanent added following lines to /etc/network/interfaces file

sudo gedit /etc/network/interfaces

Add the following line

pre-up /usr/sbin/ethtool -s $IFACE autoneg off 10 duplex full

Save and exit the file

You need to restart networking services using the following command

sudo service network restart

Please advice

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