I have data one on linux it is very very simple. First assign a private IP to your network interface using gui based interface in kde (system setting -> network) say 192.168.1.100 then set the default route to be 192.168.1.1 by the command
route add default gw 192.168.1.1 eth0
thats all now ping 192.168.1.1 and then ping the dns IP to confirm and you are on the net.
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