9.2The Essential Script Template

Every bash script should start with this:

#!/bin/bash
set -euo pipefail

Flag	Meaning	Why It Matters
set -e	Exit on any error	Prevents scripts from silently continuing after a failure
set -u	Error on undefined variables	Catches typos in variable names
set -o pipefail	Pipe fails if any command in the pipe fails	`cmd1

Without these flags, a script can fail silently — the database reset fails, but the tests still run against stale data.