===== IP and Network configuration =====

==== Enable the SSH Server ====
In Raspian Jessie it should be activated allready. If not enable the SSH server by opening the raspi-config:
  $ sudo raspi-config
In 8. Advanced Options you can activate SSH.

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==== Static IP Address ====
Look up your gateway:
  $ netstat -r -n
Find you IP address:
  $ ifconfig
or:
  $ ip addr
Give the Raspberry Pi a static IP address. Open the interfaces file:
  $ sudo nano /etc/network/interfaces
Add these lines:
    # Ethernet
    iface eth0 inet dhcp
    allow-hotplug eth0
    auto eth0:1
    iface eth0:1 inet static
      address 192.168.0.199
      netmask 255.255.255.0
      gateway 192.168.0.1
Or:       
    # Ethernet
    allow-hotplug eth0
    iface eth0 inet static
      address 192.168.0.199
      netmask 255.255.255.0
      gateway 192.168.0.1
      dns-nameservers 192.168.0.1
      
Save and quit, ctl+o, Return, ctl+x.\\

Disable the DHCP-Client:\\     
In Raspbian Wheezy:
  $ sudo service dhcpcd stop
  $ sudo update-rc.d -f dhcpcd remove

In Raspbian Jessie:
  $ sudo service dhcpcd stop
  $ sudo systemctl disable dhcpcd       
       
Restart ethernet:
  $ sudo ifdown eth0:1
  $ sudo ifup eth0:1
  
Or/and reboot:
  $ sudo reboot
  
==== Login over SSH ====
One can login from your computer with:
  $ ssh pi@192.168.0.199
or with XWindows support:
  $ ssh -XY pi@192.168.0.111
PW: raspberry\\
Or install an VNC server: [[vnc|VNC]]

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==== Miscellaneous ====
If the host key verification failed, one can remove the old key with:\\
  $ ssh-keygen -R 192.168.0.123
And with\\
  ~.
one can terminate a broken ssh session.

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