How to unset exported variables?

To unset (remove) exported variables in a Linux shell, you can use the unset command, just like you would for local variables. Here’s how to do it:

Unset the Exported Variable: Use the unset command followed by the variable name to remove the exported variable.
```
unset VARIABLE_NAME
```
Example:
```
export MY_VAR="Hello, World!"
echo $MY_VAR  # Outputs: Hello, World!
unset MY_VAR
```
Verify the Variable is Unset: After unsetting the variable, you can check if it has been successfully removed by using the echo command.
```
echo $VARIABLE_NAME
```
If the variable has been unset, this command will produce no output.

Example:
```
echo $MY_VAR  # Outputs nothing, indicating the variable has been unset
```
Check with the env Command: You can also use the env command to confirm that the variable is no longer listed among the environment variables.
```
env | grep VARIABLE_NAME
```
If the variable has been unset, this command will yield no results.

Example:
```
env | grep MY_VAR  # Outputs nothing, confirming that MY_VAR is not set
```

Use unset VARIABLE_NAME to remove an exported variable.
Check with echo $VARIABLE_NAME to see if it outputs nothing.
Use env | grep VARIABLE_NAME to confirm it is not listed among environment variables.

If you have any further questions or need additional assistance, feel free to ask!