<s>[INST] 4/16/21

Exercise: Create a shell script that can handle errors in a robust way.

Step 1: Create a new shell script file

Create a file called `robust_script.sh` and make it executable by running `chmod +x robust_script.sh`:

```bash
#!/bin/bash

# Function to handle errors
error_handler() {
  echo "Error occurred: $1"
  exit 1
}

# Call a command that may fail
ls -l /nonexistentfile

# Call the error handler if the previous command failed
if [ $?[/INST]