====== command line network howto ======

DNS settings

edit /etc/resolv.conf

add a nameserver (8.8.8.8 for google)

get online

  * which network interfaces are up?

for ethernet

<code>dmesg | grep "eth"</code>

for wireless

<code>dmesg | grep "wlan"</code>

  * which network card(s) do i have? (must have lshw package installed)

<code>lshw -C network</code>


  * external wireless card connected

<code>lspci | grep USB</code>


  * display and configure network interfaces

<code>ifconfig</code>


  * display and configure wireless network interfaces

<code>iwconfig</code>

connect to a network:

<code>iwconfig [iface(wlan0)] essid "[essid]" key s:[password]</code>

need to have wpasupplicant installed, and also allow [iface] in /etc/network/interfaces

<code>
#allow-hotplug wlan0
auto wlan0  #bring it on boot, optional
iface wlan0 inet dhcp
#optionally, hardcode the network settings here
    wpa-ssid [essid]
    wpa-psk [password]
</code>

then, start the [iface]

<code>ifup wlan0</code>

or restart it

<code>ifdown wlan0
ifup wlan0
</code>
  * put the interface in promiscuous mode

<code>ifconfig [interface] down
iwconfig [interface] mode Monitor
ifconfig [interface] up </code>