Fix Casper-md5check Service Error After Boot on Linux

Published on 2024-09-26

How to Fix the Casper-md5check.service Error After Boot on Linux / Ubuntu

Introduction

When booting your Linux system, you might encounter errors that can be viewed using the journalctl command. One such error is related to the casper-md5check.service. In this article, I'll explain what this error means and how to resolve it.

Tutorial

1. Identifying the Error

To view boot-time errors, use the following command in the terminal:


sudo journalctl -p 3 -xb

If you see the following error, it indicates an issue with the casper-md5check service:


systemd[1]: Failed to start casper-md5check.service - casper-md5check Verify Live ISO checksums.

2. Understanding the Error

The casper-md5check service is designed to verify the integrity of a Live ISO system. However, on an installed system, this service is unnecessary and can cause boot-time errors.

3. Resolving the Error

To fix this issue, we need to disable the casper-md5check service. Run the following commands in the terminal:


sudo systemctl disable casper-md5check.service


sudo systemctl stop casper-md5check.service


sudo systemctl mask casper-md5check.service

These commands will:

Disable the service from starting at boot.
Stop the currently running service.
Mask the service to prevent it from being started manually.

4. Verifying the Fix

After running these commands, reboot your system. Then, check the journal logs again:


sudo journalctl -p 3 -xb

You should no longer see the error related to casper-md5check.service.

Conclusion

By disabling and masking the casper-md5check service, you've eliminated an unnecessary error from your boot process. This helps streamline your system startup and keeps your logs clean of irrelevant warnings.