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  1. Jarret B


    Check my article Also, if it comes down to it, reinstall the whole server from scratch.
  2. Jarret B

    Introduction to Zenity (Part 2)

    This article is the rest of the information on using Zenity. Zenity is a command-line utility for Linux and Unix-like operating systems that allows you to create graphical dialog boxes and forms from shell scripts or command-line prompts. If you have not read the first part, then look at it...
  3. Jarret B

    Process Management in a Terminal

    Within a terminal you can start a process, such as updating your system packages. But what if you want to perform more tasks rather than wait for the update to finish? We can place processes in the background and let them continue to run while we run other processes in the foreground. It is...
  4. Jarret B

    LFCS – Set up an E-mail Server (CentOS)

    In this article, we will cover setting up a Simple Mail Transport Protocol (SMTP) Server, which sends and receives mail to and from the Internet. We will also set up the ability to forward email across our servers. We will set up Internet Message Access Protocol (IMAP) and Post Office Protocol 3...
  5. Jarret B

    DCA – 07 – Lock and Unlock a Swarm

    When running a swarm, there is a lot of information stored within the logs of the managing node. The information can be sensitive to security. We store everything that is performed by the managing nodes in the logs. The head node creates the logs and replicates the logs to the other managers...
  6. Jarret B

    Introduction to Zenity (Part 1)

    Zenity is a command-line utility for Linux that allows developers and users to create graphical user interfaces (GUIs) for shell scripts and other command-line applications. It provides a simple and easy way to display dialog boxes, information messages, input forms, and other types of windows...
  7. Jarret B

    Working With Nautilus Scripts

    Sometimes, you may use Nautilus and wish you could add your own script to the right-click ability on a file or folder. In this article, we'll look at that. Scripting Languages To use scripts in Nautilus, the language can be BASH, Python, Perl or Ruby. You can use any of these to write a...
  8. Jarret B

    LFCS – Understanding PXE Boot

    The Preboot Execution Environment (PXE), commonly referred to as 'pixie', is a means to boot from a Network Interface Card (NIC) to the network. Once booted, the Dynamic Host Configuration Protocol (DHCP) Server gives an IP Address to it. Configurations from the DHCP Server will cause the PXE...
  9. Jarret B

    DCA – 06 – Docker Registry

    A Docker Registry is a local system that acts as a hub to upload and download Docker images. The Docker Registry is a repository of the images that you made or downloaded. The Docker Registry will be available to all systems on the network with access, as well as having a key and the user...
  10. Jarret B

    LFCS – BIND DNS Management

    Actually, just ignore all the instructions for Ubuntu. They are wrong. I'm not sure how I had it working with these instructions. At least working enough. I'll have better instructions coming in the article: 'LFCS – DNS and E-mail (Ubuntu and some CentOS)'.
  11. Jarret B

    LFCS – BIND DNS Management

    There will be more additions to the DNS when it is used more in the article "LFCS: Mail Server". I will just write another article for installing DNS on Ubuntu. It's more involved than CentOS and the directions are not working as I thought. I also have to add more info on making a forward and...
  12. Jarret B

    Trying Out Some Nautilus Extensions

    Nautilus is the default File Manager used on the GNOME desktop in Ubuntu. For those of you use Nautilus as your default File Manager, I am going to cover some extensions that you can add to make Nautilus function better for you. NOTE: Nautilus is not just available on Ubuntu, but you can...
  13. Jarret B

    Manipulating PDFs with PDFsam

    Many people use PDF files for sending and reading documents. A Portable Document Format (PDF) is a format to store text and images in their original layout. This means that if you create a PDF file with text using a specific font, anyone looking at the document will see the original font style...
  14. Jarret B

    LFCS – Setting up a DHCP Server

    Most people may not deal directly with a Dynamic Host Control Protocol (DHCP) Server. Everyone will connect to the internet at times and their device is assigned an IP Address. A DHCP Server assigns the IP Addresses to devices connecting to the specific network. We are going to set up a DHCP...
  15. Jarret B

    DCA – 05 – Creating Docker Images

    There are many images we can use in Docker, but there may be times we need to create our own images. Images that we need to manipulate to suit our needs. So, we are going to make our own images with an example to help. Building an Image Let's start by creating a file to be used to build an...
  16. Jarret B

    Can't figure out of this error

    It looked like the '.deb' was definitely corrupted if it couldn't unpack it.
  17. Jarret B

    Virtualization with Boxes

    There seem to be many apps out there that support Virtualization of other Operating Systems (OS). Boxes is a little different. Boxes has a few pre-built Operating System Virtualizations you can download, but you can create your own. Installing Boxes There are two ways to install Boxes. The...
  18. Jarret B

    Popsicle: Flash Images to USB

    I came across some information about this program on the Internet. I looked at and found that there were a few conversations about it. Popsicle is a program that allows you to burn an ISO to a USB drive. This may sound familiar, since a few other programs do this too. Popsicle allows...
  19. Jarret B

    LFCS – File Transfer Protocol (FTP)

    Everyone probably uses FTP at one point or another. In this article, we will set up an FTP server and configure it for anonymous connections. We will also set it up to be used as a repository and then actually use it as a repository from another server. So, Server 1, that is currently a DNS...
  20. Jarret B

    DCA – 04 – Running Containers

    The information in this article is basic knowledge you need to know when dealing with Docker and running containers. I have covered some of this already, but I want to make sure we cover it and it you understand it. More information will come later, of course, but these are the basics. Anytime...