Can't get the internet to work

I have every thing assembled and installed ubuntu, however the internet won't connect.
PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD FX-6350 3.9GHz 6-Core Processor ($139.99 @ Newegg)
Motherboard: Asus M5A97 LE R2.0 ATX AM3+ Motherboard ($89.99 @ Newegg)
Memory: G.Skill Ripjaws Series 8GB (2 x 4GB) DDR3-1600 Memory ($78.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($69.99 @ Newegg)
Video Card: PowerColor Radeon HD 7970 3GB Video Card ($289.99 @ Newegg)
Case: NZXT Source 210 (Black) ATX Mid Tower Case ($45.98 @ Newegg)
Power Supply: SeaSonic S12II 620W 80+ Bronze Certified ATX Power Supply ($71.98 @ SuperBiiz)
Total: $773.91
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-11-23 18:34 EST-0500)