In linux,/etc/profile ,~ /. Bash_profile ~ /. Profile Execution Process

In linux,/etc/profile ,~ /. Bash_profile ~ /. Profile Execution Process

When you log on to linux,/etc/profile ,~ /. Bash_profile and other file execution processes.

The file execution process when logging on to Linux is as follows:

When logging on to Linux, start the/etc/profile file first, and then start ~ /. Bash_profile ,~ /. Bash_login or ~ /. One of the profile files is executed in the following sequence :~ /. Bash_profile ,~ /. Bash_login ,~ /. Profile. If ~ /. If the bash_profile file exists, it is generally executed ~ /. Bashrc file. Because in ~ The/. bash_profile file usually contains the following code:

If [-f ~ /. Bashrc]; then

../Bashrc

Fi

~ /. Bashrc usually has the following code:

If [-f/etc/bashrc]; then

./Bashrc

Fi

So ,~ /. Bashrc calls the/etc/bashrc file. Finally, when you exit the shell, ~ /. Bash_logout file.

The execution sequence is:/etc/profile-> (~ /. Bash_profile | ~ /. Bash_login | ~ /. Profile)-> ~ /. Bashrc->/etc/bashrc-> ~ /. Bash_logout

The scope of each file is described as follows:

(1)/etc/profile: This file sets the environment information for each user in the system. When the user logs on for the first time, this file is executed. and from/etc/profile. d directory configuration file to collect shell settings.

(2)/etc/bashrc: execute this file for every user running bash shell. When bash shell is opened, the file is read.

(3 )~ /. Bash_profile: each user can use this file to input the shell information dedicated to their own use. When a user logs on, this file is only executed once! By default, it sets some environment variables to execute the user's. bashrc file.

(4 )~ /. Bashrc: This file contains bash information dedicated to your bash shell. This file is read when you log on and every time you open a new shell.

(5 )~ /. Bash_logout: execute this file every time you exit the system (exit bash shell). In addition, the variable (global) set in/etc/profile can act on any user, and ~ The variables (local) set in/. bashrc and so on can only inherit the variables in/etc/profile. They are "Parent-Child" relationships.

(6 )~ /. Bash_profile is interactive and login to run bash ~ /. Bashrc is the interactive non-login mode that enters bash. Generally, the two settings are roughly the same, so the former usually calls the latter.