https://bowerstudios.com/node/1015



# - Add a network card in Ubuntu Server - #

If you've added another network card to Ubuntu Server, the way to enable it is:
First you need to find the name of the card;



# - Finding your network interface - #
# - Tests on uServerOffice - #



# - Command - #
ls /sys/class/net

# - Shows - #
enp0s15  lo  virbr0  virbr0-nic



# - Command - #
ip addr

# - Shows - #
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp0s15: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:e0:4d:6b:e7:f0 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.100/24 brd 192.168.1.255 scope global enp0s15
       valid_lft forever preferred_lft forever
    inet6 fe80::2e0:4dff:fe6b:e7f0/64 scope link 
       valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:93:8b:26 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000
    link/ether 52:54:00:93:8b:26 brd ff:ff:ff:ff:ff:ff




# - Try: - #
dmesg | grep -i network
lspci -vv | grep Ethernet

You could also search for "eth" instead of "network"

In my case I have two:

[ 1.165623] e1000 0000:00:03.0: eth0: Intel(R) PRO/1000 Network Connection
[ 1.645478] e1000 0000:00:08.0: eth1: Intel(R) PRO/1000 Network Connection

named eth0 and eth1.



# - To see which is already in use and other info about your networking interfaces - #
ifconfig



# - In my case eth0 is currently already configured, so I need to enable eth1 - #
sudo vim /etc/network/interfaces

Adding these lines:

auto eth1
iface eth1 inet dhcp



# - Then you can stop/start/restart networking with - #
sudo /etc/init.d/networking start
sudo /etc/init.d/networking stop
sudo /etc/init.d/networking restart

sudo service networking restart


# - For a static IP - #
sudo vim /etc/network/interfaces


auto eth1
iface eth1 inet static
address 192.168.1.2
netmask 255.255.255.0
network 192.168.1.0
broadcast 192.168.1.255




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