关于bash配置文件的奇怪的问题

killads

When bash is invoked as an interactive login shell, or as a non-interactive shell with the --login option, it first reads and executes commands from the file /etc/profile, if that file exists. After reading that file, it looks for ~/.bash_profile, ~/.bash_login, and ~/.profile, in that order, and reads and executes commands from the first one that exists and is readable.
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When an interactive shell that is not a login shell is started, bash reads and executes commands from ~/.bashrc, if that file exists

昨天我做了一件事情

[root@sarge ~]PATH=aaa
[root@sarge ~] env
-bash: env: command not found

这样以来，大部分命令都需要输入绝对路径。我exit退出后重新登陆了一遍，PATH就恢复原来的了。

我的问题是：
PATH是在/etc/profile中设定的，我改掉后为何重新登陆就恢复了？我的理解是应该是系统重新启动后才应该恢复。

环境debian3.1r0 init 2

yongjian

not sure what your question is... if you relogin back, login runs /etc/profile to setup the env for you then you get your default $PATH back.

killads

谢谢楼上,开始我理解错了。

/etc/profile这个文件，每次登陆的时候会加载一次。我误以为是系统启动的时候，用户登陆前加载一次。