How to Create and Manage Cron Jobs on Linux


Cron jobs are an essential feature on Linux that enables users to automate repetitive tasks by scheduling scripts or commands to run at specific intervals. This guide will provide an overview of cron jobs and walk you through the process of creating, managing, and troubleshooting them on Linux.

Understanding Cron Jobs

A cron job is a scheduled task that runs automatically at specified intervals on your Linux system. These tasks are managed by the cron daemon, which runs in the background and checks the crontab (cron table) for scheduled tasks. Common uses for cron jobs include running backups, sending emails, and updating databases.

Cron Job Syntax

A cron job entry consists of six fields that define the command and the schedule. The fields are as follows:

  1. Minute (0-59)
  2. Hour (0-23)
  3. Day of the month (1-31)
  4. Month (1-12)
  5. Day of the week (0-7, where both 0 and 7 represent Sunday)
  6. Command to be executed

Each field is separated by a space, and you can use an asterisk (*) as a wildcard to represent any value.

Creating a Cron Job

To create a cron job, you need to edit your user’s crontab. Follow these steps:

1. Open the terminal by pressing Ctrl + Alt + T on your keyboard or by searching for it in the applications menu.

2. Type crontab -e to open the crontab file in your default text editor.

3. Add a new line to define your cron job using the syntax mentioned above.

For example, to run a script called every day at 3:30 AM, add the following line:

30 3 * * * /path/to/

4. Save the file and exit the text editor. The new cron job is now scheduled.

Listing and Removing Cron Jobs

To view the list of your current cron jobs, run the crontab -l command in the terminal. This will display all the scheduled tasks in your crontab file.

If you want to remove a specific cron job, follow these steps:

1. Open the crontab file using crontab -e.
2. Locate the line containing the cron job you want to remove.
3. Delete the line and save the file. The cron job is now removed.

To remove all cron jobs for your user, run the crontab -r command in the terminal.

Troubleshooting Cron Jobs

If your cron job is not running as expected, consider the following common issues:

1. Ensure that the command or script in the cron job is executable and has the correct permissions.
2. Check that the script or command’s path is correct.
3. Verify that the environment variables needed for the script or command are properly defined.
4. Check the system logs for any error messages related to the cron job. You can find these logs in the /var/log/syslog or /var/log/cron files.


Cron jobs are a powerful tool for automating tasks in Linux. By understanding the syntax and using the crontab command, you can easily create, manage, and troubleshoot scheduled tasks on your system. With cron jobs, you can save time, ensure consistency, and improve the overall efficiency of your Linux environment.

Please Leave Feedback and Corrections in the Comments

More to Explore

Table of Contents

Leave a Reply

Your email address will not be published. Required fields are marked *

What are you looking for?

Type in a question or keyword below

Frequently Asked Questions

Why are your prices so high?

Our prices actually aren’t that high when you compare our laptops to models in the same class. Our Aon S1 is in the same class as the Dell XPS 13, Lenovo Thinkpad X1, and MacBook Pro. When you compare against these models, you will see our pricing is actually very reasonable, especially considering the fact that our Aon S1 has many advantages over these other models, including user-upgradeability, user-serviceability, and customizability.

Also, it’s important to note that unlike other laptop manufacturers that do final assembly in China, our laptops are built-to-order in the United States. This enables us to provide a much broader array of customization options compared to companies like Dell, Lenovo, and Apple, although at a higher cost.

Read More

Are all the parts soldered to the motherboard?

In many modern laptops, especially thin and light models (like Apple’s MacBook Air or Pro, Dell’s XPS 13, or many of Lenovo’s ThinkPad X1 Carbon models), the memory, storage, battery, and wireless module are often soldered directly onto the motherboard. This is done to save space and allow the laptop to be thinner, but it means that the RAM and SSD are not user-upgradeable.

However, as part of our commitment to the Right to Repair Movement, the memory, storage, battery, and wireless module all MALIBAL laptops are user-upgradeable or user-replaceable.

Do any of your laptops support coreboot?

Coreboot is an open-source project aimed at replacing the proprietary BIOS (Basic Input/Output System) firmware found in most computers. BIOS firmware is the first piece of software that runs when a computer is turned on. It initializes the hardware and starts the operating system.

Coreboot is designed to perform only the minimum amount of hardware initialization necessary to load and run a modern 32-bit or 64-bit operating system. This minimalist approach not only reduces the complexity and potential attack surface of the firmware, but it can also speed up the system boot time significantly.

Coreboot can be used with payloads such as a Linux kernel, SeaBIOS, or UEFI firmware to provide a complete firmware solution. It’s appreciated by users who want to have more control over their hardware, value the transparency and security that come from open-source software, or have specialized requirements.

Coreboot with EDK II is supported on our Aon line of laptops.

Can your laptops be charged or powered via USB-C?

USB-C is revolutionizing the way we charge laptops. As a universal charging standard, USB-C has a number of advantages that make it particularly suited for this task.

First and foremost, it offers high power delivery capability – up to 100 watts – which is sufficient to charge even power-hungry laptops. This eliminates the need for proprietary laptop chargers and allows for charging via common adapters, power banks, or even other laptops.

Additionally, USB-C is a reversible connector, meaning it can be inserted either way, making it more user-friendly.

It also supports data transfer and display output, allowing for a single cable to provide power, transfer data, and connect to external monitors.

All MALIBAL laptops can be powered via the Thunderbolt 4 port.

MALIBAL is an innovative technology company that produces high-performance, custom linux laptops for developers and content creators; mobile workstations for engineers, scientists, video editors, 3D modelers, and animators; and mobile servers for enterprise applications. On our site, you will find information about the best linux laptops, such as our Aon S1 and Aon L1 models, our customers, new articles, latest news, guides, features, and more.
How do I get a quote?

If you need a quote for any reason, e.g., to submit to accounting for approval, before ordering, simply add the laptop(s) you want to purchase to the Cart, then click Checkout, and on the checkout page, click Convert Cart to Quote. We will email you a PDF of the quote with a link to make payment once you are ready to complete the order.

How do I cancel an order?

You may cancel an order any time up until it ships. After it ships, you will not be able to cancel it, but will instead have to use our return policy in order to return the laptop for a refund. To cancel an order, simply open a sales ticket or sales chat and give the representative your order information, and they will cancel the order for you and send you confirmation via email and text.


How do I make a change to my order?

You may make changes to your order up until it ships. To modify an order, simply open a sales ticket or sales chat and give the representative your order information and specify which changes you want to make.

When is my order shipping?

If all parts are in stock, the average build time for laptops is 5-7 business days. This means laptops will ship 5-7 business days after the order is placed. If a component is backordered, it will say which parts are backordered in your order confirmation email.

To see the estimated delivery date of your laptop, please check your order confirmation email for the Estimated Delivery Date. You can also see this information on your My Account > Order Details page. The estimated delivery date is the build time (plus backorder delay, if applicable) plus the shipping time.

Once your laptop ships out, we will email you the tracking information. An adult will need to be at the address to sign for the package when it arrives.

How do I track my order after it ships?

You can view your tracking status via the order details page in your account.