打开终端（应用程序——实用工具），运行：
sudo vi /etc/hosts
屏幕上会提示你输入密码（输入密码的时候不会有任何字符显示，甚至*都不会显示，输完之后按回车就是了），打开 hosts 文件之后按 i 键进入插入模式（可理解为编辑模式），然后按照你的需要对该文件进行编辑，
添加--------->>>> 0.0.0.0 account.jetbrains.com
编辑完成之后按 ESC 键退出插入模式，之后按 :wq+回车保存退出，记得英文的冒号也是要输入的哦。
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