What is .bashrc used for?

The .bashrc file is a script that runs whenever a new terminal session is started in a Bash shell. It is used for configuring the shell environment and customizing user settings. Here are some common uses:

1. Environment Variables: You can set environment variables that define the behavior of the shell and applications.

   export PATH=$PATH:/usr/local/bin

2. Aliases: You can create shortcuts for commands to save time.

   alias ll='ls -la'

3. Shell Options: You can enable or disable shell features.

   shopt -s histappend

4. Functions: You can define custom functions to automate tasks.

   function greet() {
       echo "Hello, $1!"
   }

5. Prompt Customization: You can change the appearance of the command prompt.

   PS1='\u@\h:\w\$ '

Changes made to .bashrc take effect in new terminal sessions. To apply changes immediately, you can run source ~/.bashrc.

If you have more questions or need further clarification, feel free to ask!