Ubuntu Network Manager
Fix networking when installed from NFS/Live CD to use network manager
remove this entry from "/etc/network/interfaces" which will have been created and stop network manager working, cursor down, ctrl-k deletes line, ctrl-o save
sudo nano -w /etc/network/interfaces #remove these two lines and save auto eth0 iface eth0 inet manual #restart network manager, should pick up and perform dhcp sudo service network-manager restart
If you network card isnt eth0, fix this here
sudo nano -w /etc/udev/rules.d/70-presistent-net.rules # remove everything from below the # comment block bit, save reboot.
To see current network manager settings
To add additional DNS servers in Ubuntu 12.04 , using dnsmasq by default, correctly;
DONT try adding to /etc/resolv.conf
DONT add anything in /etc/network/interfaces
DONT create files in /etc/resolvconf/resolv.conf.d/tail
edit /etc/dhcp/dhclient.conf and add or uncomment/change the prepend line, thus
#prepend domain-name-servers 127.0.0.1; prepend domain-name-servers 220.127.116.11, 18.104.22.168; request subnet-mask, broadcast-address, time-offset, routers,
nm-tool output should now list those additional dns servers.
IPv4 Settings: Address: 192.168.2.200 Prefix: 24 (255.255.255.0) Gateway: 192.168.2.254 DNS: 22.214.171.124 DNS: 126.96.36.199 DNS: 192.168.2.254