When developing under Linux, we often install a lot of environments. Because there are many environments, we need to configure it as a global command, so that it is easy to operate. When configured as a global command, there is a way that is more commonly used:
vim /etc/profile 增加配置信息，然后source /etc/profile是之生效。的确当前终端环境下的确是生效了，但是打开新的终端会发现，怎么没有生效？是我配置没成功吗？不对呀，之前明明可以的。
这个时候，你只需要执行下面操作即可：
vim ~/.bashrc
然后最后一行添加 source /etc/profile
