The XMODMAP-PK command finds the right SHIFT key to KeyCode, which is intended to map right shift to the equals key of my notebook, because the equals key on the notebook also has a plus key function, so you need the following command:
Xmodmap-e "keycode = Equal Plus"
62 is the right shift keycode,equal and plus for the Equals and plus keys, respectively.
In order for the system to set up such a mapping at boot, system->preferences->startup applications, in the Stratup programs to increase the startup program!
If the command is filled in Commad:
If the keyboard layout is garbled (ubuntu12.04~16.04)
In the system settings, text input, click on the lower left corner of the + sign, add the source, add "Chinese" and "Chinese (Pinyin)" can be.
Reference: http://www.cnblogs.com/feixingfei/archive/2010/04/04/2297620.html
Reference: http://blog.csdn.net/llq108/article/details/42581651
Ubuntu Modify Keyboard mapping