在/home/目录下建立文件.Xmodmap文件，填入：
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| remove Mod4 = Super_L
remove Control = Control_L
keysym Control_L = Super_L
keysym Super_L = Control_L
add Mod4 = Super_L
add Control = Control_L
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如果想将左ctrl和左alt交换位置，则为：
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| remove mod1 = Alt_L
remove control = Control_L
keysym Control_L = Alt_L
keysym Alt_L = Control_L
add mod1 = Alt_L
add control = Control_L
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然后在Startup Applications Preferences中添加项目，指令填
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| /usr/bin/xmodmap /home/.Xmodmap
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