how to make a bash script continue to run after an error

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How to Make a Bash Script Continue to Run After an Error

By default, a Bash script will exit immediately upon encountering an error. This is a safety mechanism to prevent cascading failures and potentially damaging operations. However, there are situations where you want your script to continue executing even if some commands fail. This tutorial will explain how to achieve this, covering different strategies, techniques, and best practices for robust error handling in Bash.

*Understanding the Default Error Handling Behavior*

Before diving into the solutions, it's crucial to understand why Bash stops on error. This behavior is governed by the `set -e` option. When `set -e` is enabled (which is often the default in many distributions or through shebang lines like `#!/bin/bash -e`), it tells Bash to exit immediately if a command exits with a non-zero exit status (indicating an error). A zero exit status typically signifies success.

*Methods for Continuing Execution After an Error*

Here are several methods to allow your Bash script to continue executing even if a command returns an error:

*1. Disabling `set -e` (Globally): Not Recommended for Robustness*

*How:* Remove or comment out the `set -e` command from the script. You can also explicitly disable it with `set +e`.
*Code Example:*



*Explanation:* Without `set -e`, Bash will ignore the exit status of commands. The script will continue to execute lines sequentially regardless of whether earlier commands succeeded or failed.
*Why It's Not Recommended:* This is generally not the best approach. Completely disabling `set -e` makes your script vulnerable to running in an unpredictable state if critical operations fail silently. You lose the benefit of the fail-fast behavior, potentially leading to more severe problems down the line.

*2. Using the `|| true` trick (After Each Command): Simple but Can Be Tedious*

*How:* Append `|| true` to the end ...

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