9 - Tuning the Bash Environment

9.2 Configure shell

Profile

1. It sets up the initial environment.

2. Example usage

   • Modify the PATH: If you install custom software in a non-standard folder (like ~/bin or ~/.local/bin), you add it to the PATH here so the system knows where the executables are.

   • Execute One-Time Scripts: If you want a specific "Message of the Day" or a system health check to run only when you first log in, put it here.

   • Export Global Variables: Export LANG=en_US.UTF-8 (Sets the system language/encoding).

3. File Name

   • Global:  /etc/profile

   • User-specific:  ~/.bash_profile

Bashrc

1. It is for things that make your manual typing faster and more visual.

2. Example usage

   • Store aliases and variable permanently: 7 - Local and Environment Variables & 8 - Alias

   • Customize the Prompt: Change how your command line looks (adding colors, timestamps)

3. File Name

   • Global:  /etc/bashrc

   • User-specific:  ~/.bashrc