Shell basics-environment variable configuration file,

Shell basics-environment variable configuration file,

Shell basics-environment variable configuration file

 

Source configuration file or. configuration file:

After the environment variables are written to the configuration file, You need to log on again to take effect. Instead, you can directly use the source command to take effect.

Main configuration files:

/Etc/profile

/Etc/profile. d/*. sh

~ /. Bash_profile

~ /. Bashrc

/Etc/bashrc

The/etc/profile. d/*. sh/etc/bashrc takes effect for all users.

~ /. Bash_profile ~ /. Bashrc only applies to the current user

Call Sequence of environment variable configuration files

# Images cannot be displayed. You can chat privately if necessary.

Role of the configuration file/etc/profile

USER variable

LOGNAME variable

MAIL variable

PATA variable

HOSTNAME variable

HISTSIZE variable

Umask

Call the/etc/profile. d/*. sh File

 

Configuration File ~ /. Role of bash_profile

Call ~ /. Bashrc File

Add the ": $ HOME/bin" directory to the PATH variable.

 

Shell logon information

Welcome to the local terminal:/etc/issue

 

# Images cannot be displayed. You can chat privately if necessary.

 

Remote login information file (the above Escape Character cannot be used in this folder, only plain text information can be written):/etc/issue.net

Whether to display the welcome information is determined by the ssh configuration file/etc/ssh/sshd_config. You can add the "Banner/etc/issue.net" line to display the information and restart the SSH service.

 

Welcome Message for remote and local Logon:/etc/motd