Can you explain the 'export' command?

The export command in a Unix-like shell is used to set environment variables or mark variables for export to child processes. When you export a variable, it becomes available to any subprocess or shell that is spawned from the current shell.

Syntax:

export VARIABLE_NAME=value

Example:

1. Setting an Environment Variable:

   export MY_VAR="Hello, World!"
   

2. Accessing the Variable: You can access this variable in the current shell or any child processes:

   echo $MY_VAR
   

3. Listing Exported Variables: To see all exported variables, you can use:

   export -p
   

Use Cases:

• Setting paths for applications (e.g., PATH, JAVA_HOME).
• Configuring environment settings for scripts or applications.

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