Genuino 101 - Can't upload my sketch - Timeout Error
Is the Genuino 101 board been recognized by the OS? Sounds like your board is not being recognized by the system. 

For windows, open up your device manager before plugging into the PC. After plugging in, the device manager should refresh and display the board in the COM Port section. 

For Linux (in your case Ubuntu), you can use the dmesg | tail cmd to check whether your board is being detected when you plug in the Genuino 101 board.