添加在窗口左侧：
gsettings set org.gnome.settings-daemon.plugins.xsettings overrides "{‘Gtk/DecorationLayout‘: <‘minimize,maximize,close:‘>}"
添加在窗口右侧：
gsettings set org.gnome.settings-daemon.plugins.xsettings overrides "{‘Gtk/DecorationLayout‘: <‘:minimize,maximize,close‘>}"
参考：
原文：https://www.cnblogs.com/tommy-huang/p/15253395.html