Manage network cards and speed settings in Ubuntu
30 March 2010
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Network cards can be tricky at times. Adjusting speed and finding out information about your card is accomplished with ethtool. With ethtool, you can query and change your network speed, auto-negotiation, and others. If you do not already have it installed, get ethtool
sudo apt-get install ethtool
A GUI client is not available, it is all command line. Start out by finding some information about your current card. Here is the syntax for your Terminal:
sudo ethtool -s eth0 speed [SPEED] duplex [DUPLEX]
Further examples for setting up your network card and fine tuning performance are as follows:
sudo ethtool -s eth0 speed 100 duplex full
sudo ethtool -s eth0 speed 10 duplex half
sudo ethtool -s eth0 autoneg off
The above examples convert your settings to a full duplex, half duplex, and disable auto-negotiation, respectively.
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