Chinese input is fun, for the warped mind that I am. Yes, it is exceptionally difficult to learn Chinese, but after that little hurdle, and significant eye strain, it is fun. Chinese input methods on Ubuntu 14.04 is somewhat confusing, as it is very easy to install, both for SunPinyin and Pinyin yet there are bugs. I installed SunPinyin, and when I could not input certain characters, also installed Pinyin. Here are the ones I found, and their fixes.
Pinyin Joe has installation instructions for Chinese, and the very many input methods. He also has a page for Ubuntu 14.04 Chinese bugs. This fixed the “学” xue bug in Pinyin, but not in SunPinyin.