Linux Basics-Read the configuration file order when a user logs on

Linux under All files, at the login will also follow the login to read many configuration files. Learn some information before you introduce the reading order.

Shell type for user login

Log-in Shell

Log in normally via a terminal

Su-username

Su-l USERNAME

Non-sign-on shell

Shell in the following way

Su USERNAME

Terminal window opened by graphical terminal

Shell scripts that are executed automatically

Bash's configuration file

Global configuration file

/etc/profice,/etc/profile.d/*.sh,/etc/bashrc

User Personal Profile

~/.bash_profile,~/.bashrc

Profile type file function:

Setting environment variables

Run a command or script when a user logs on

Files of the BASHRC class:

Setting Local Variables

Defining command aliases

Logon Shell reads the order of configuration files at logon

/etc/profile--/etc/profile.d/*.sh--and ~/.bash_profile--~/.BASHRC--/ETC/BASHRC

The non-logon shell reads the configuration file in the order

~/.BASHRC--/ETC/BASHRC-/etc/profile.d/*.sh

Therefore, when you need to modify variables or aliases, you can modify different configuration files according to the order in which they are read.

Note: The current shell will not be affected when the second modification affects only the future login shell

This article from "Liang Childe" blog, please be sure to keep this source http://iyull.blog.51cto.com/4664834/1883446

Linux Basics-Read the configuration file order when a user logs on