Let's configure static IP for our Raspberry Pi.
*For OS Jessey
1. Open dhcpcd.conf
$ sudonano /etc/dhcpcd.conf
2. Set static IP Address
#define static profile
profile static_eth0
static ip_address=192.168.1.23/24
static routers=192.168.1.1
static domain_name_servers=192.168.1.1
3. Reboot and SSH
After you reboot, you should be able to SSH to your new static address.
Done.