Help! Lighting will not build!

When I build my map the lighting gets stuck at 0%. I have looked through the answerhub and none of the questions pertaining to my problem have seem to help. Also I should mention that The lighting used to build offline and online. Now it won’t build at all! This is really frustrating as I have just started to get accustomed to using this awsome program. Help please!

My pc specs.

OS: Unbuntu, latest version.

Processor: AMD FX-4100 Quad-Core Processor × 4

Video card: GeForce GTX 550 Ti.

Memory: 8Gig

Closing as duplicate of: [Linux] Cannot build lighting! - Platform & Builds - Unreal Engine Forums