set -e for exit on error in Bash Scripting - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does set -e do in a bash script?

set -e makes the script stop running immediately if any command returns an error (non-zero exit code).

beginner

Why is set -e useful in bash scripts?

It helps catch errors early by stopping the script, so you don't run commands that depend on failed steps.

beginner

How do you enable set -e in a bash script?

Add set -e near the top of your script, usually after the #!/bin/bash line.

beginner

What happens if a command fails after set -e is set?

The script immediately exits and does not run any more commands.

intermediate

Can set -e be turned off in the middle of a script?

Yes, by running set +e you can disable the exit-on-error behavior.

What does set -e do in a bash script?

A Ignores errors and continues running

B Stops the script if any command fails

C Prints all commands before running them

D Runs the script in debug mode

set -e causes the script to exit immediately if any command returns a non-zero exit code (an error).

Where should you place set -e in your bash script?

A At the very end of the script

B Anywhere in the script, it doesn't matter

C Only inside functions

D Near the top, after the shebang line

Placing set -e near the top ensures the script stops on errors from the start.

How do you disable the exit-on-error behavior after enabling set -e?

A exit 0

B set -x

C set +e

D unset -e

set +e disables the exit-on-error behavior.

If a command fails after set -e is set, what happens?

A The script exits immediately

B The script pauses and waits for user input

C The script continues running

D The command is retried automatically

The script exits immediately to avoid running commands that depend on the failed one.

Which of these is a good reason to use set -e?

A To catch errors early and avoid unexpected results

B To ignore errors and keep going

C To print all commands before running

D To make scripts run faster

set -e helps catch errors early by stopping the script when something goes wrong.

Explain what set -e does in a bash script and why it is helpful.

Think about how scripts behave when a command fails.

Describe how to enable and disable the exit-on-error behavior in a bash script.

Remember the commands start with 'set' and use plus or minus.