全部文件
/etc/profile
/etc/paths
~/.bash_profile
~/.bash_login
~/.profile
~/.bashrc
启动顺序
/etc/profile =>/etc/paths =>~/.bash_profile => ~/.bash_login => ~/.profile
/etc/profile
/etc/paths
~/.bash_profile
~/.bash_login
~/.profile
~/.bashrc
/etc/profile =>/etc/paths =>~/.bash_profile => ~/.bash_login => ~/.profile