mac里terminal的初始化文件

按照bash的说法,.bash_profile和_bashrc的作用是不同的:

.bash_profile is executed for login shells, while .bashrc is executed for interactive non-login shells.

What is a login or non-login shell?

When you login (type username and password) via console, either sitting at the machine, or remotely via ssh: .bash_profile is executed to configure your shell before the initial command prompt.
But, if you’ve already logged into your machine and open a new terminal window (xterm) inside Gnome or KDE, then .bashrc is executed before the window command prompt. .bashrc is also run when you start a new bash instance by typing /bin/bash in a terminal.


Why two different files?

Say, you’d like to print some lengthy diagnostic information about your machine each time you login (load average, memory usage, current users, etc). You only want to see it on login, so you only want to place this in your .bash_profile. If you put it in your .bashrc, you’d see it every time you open a new terminal window.

但是mac里貌似比较变态,开启一个新的terminal 的时候,只会运行.bash_profile

 

Mac OS X — an exception

An exception to the terminal window guidelines is Mac OS X’s Terminal.app, which runs a login shell by default for each new terminal window, calling .bash_profile instead of .bashrc. Other GUI terminal emulators may do the same, but most tend not to.

所以为了保险起见,将.bash_profile设置成如下内容,可以确保.bashrc被调用。我们基本上也不需要两个不同的文件:

if [ -f ~/.bashrc ]; then

   source ~/.bashrc

fi

 

 

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