RedHat中四个用户配置文件使用的先后

在/etc/profile前后分别加上一行：

into /etc/profile

leave /etc/profile

/etc/bashrc、/home/oracle/.bash_profile、/home/oracle/.bashrc也类似处理，则切换用户时可以看到如下效果从而可以得知，利用四个文件的先后顺序：
[root@law etc]# su - oracle
into /etc/profile
leave /etc/profile
into bash_profile
into /home/oracle/bashrc ========在.bash_profile中调用了/home/oracle/bashrc
into /etc/bashrc ==========在/home/oracle/bashrc 中调用了/etc/bashrc
leave /etc/bashrc
leave /home/oracle/bashrc
leave bash_profile