試了二天，原本在16.04可以用ibus設定的新酷音輸入法，到18.04失敗了
這個fcitx的方法目前ubuntu18.04.4已經不支援fcitx-qimpanel-configtool套件
參考連結(我測試這個作法已失效）
http://wenxintaichi.blogspot.com/2018/06/blog-post_29.html
改成直接用ibus才成功
首先用 apt install 的指令安裝 ibus 的新酷音
sudo apt install ibus-chewing
然後接著我們 restart ，重啟這一步很重要，如果不這麼做的話，新酷音輸入法不會出現
1. In the Language Support panel, click the "Install / Remove Languages..." button:
2. In the Installed Languages panel, select Chinese (Simplified and/or Traditional), and then click the "Apply Changes" button (not shown here), after which the necessary fonts and other bits will be downloaded and installed.
3. Click the "Manage Installed Language" button to reopen the Language Support panel, which will cause the system to automatically check for any missing pieces necessary for Chinese support. Allow that install to proceed, then close Language Support and return to Region and Language. Then click the "+" button to add input methods.
4. select "Chinese (China)" from the above list.
5. Click on "Chinese (Taiwan)", and you'll find Chewing in the list of input methods.
參考連結
這是設定pinyin輸入法用，但前半段的設定可參考
https://www.pinyinjoe.com/linux/ubuntu-18-gnome-chinese-setup.htm
這是繁體中文版