But why? Ok, sure: to get rid of the annoying cert error. But putting aside that not all errors here can even be ignored or "resolved" by passing -k, let us pretend that we actually cared and wanted to find out what the problem is. Some of the errors encountered when accessing an HTTPS service using e.g., curl(1) are self-explanatory, but for many others we are often left trying to determine just why our tool can't validate the remote certificate.

Here are a few debugging techniques that may help you better make sense of the errors: [...]

Gigabit ethernet has been around for a long time, it’s so ubiquitous that there is a very strong chance that if you have a RJ-45 port on your computer, it’s going to be a gigabit ethernet network interface.

Even if you look at computers that are over 20 years old, the only thing that stands out on their spec sheets as still being current is gigabit ethernet.

Specifically, for a long time Unix didn't have any sort of service management as such, beyond init restarting getty processes. All services were simply started as part of the boot process in what started as a very simple script and grew only somewhat from there in BSD Unixes. If you needed to check the status of services, you ran ps; if you needed to restart a service, you terminated it with kill and started the new version by hand. The System V init system moved this forward somewhat by creating scripts that encapsulated the knowledge of how to start, stop, and sometimes check the status of each service, but it did nothing to manage the services as such; it still merely booted (and shut down) the system. Noticing that a service's daemons had died and starting them again was up to you.

What that means is that both the challenging problems and the state of the art in an init system have moved on from just booting your Unix system in a static configuration. What really matters in init systems today and what distinguishes one from another is largely how they deal with operating the system and changing the system configuration. Changing the system configuration is the easier of the two sides to talk about; it's the area of how you change what happens in the next boot. How you add things, remove things, change exactly what happens, reorder things, and so on. Init systems can make this anywhere from easy to very difficult, and mostly they fall somewhere in the middle.

Axzez even builds a custom OS that can run either on eMMC storage, a USB flash drive, or over one of the SATA drives (though the latter option still requires a flash drive for the early boot stage).

I tested their OS, and tested every feature on the board—an RTC, front panel ATX power switch and power LED, all five SATA ports, two full-size HDMI ports, four 12v 3-pin fan headers, a USB 2.0 internal header and 2x rear USB 2.0 ports, and the 24-pin ATX power connector to power the board itself. Everything worked great out of the box, and the software (even at its early stage) seemed to perform adequately.

Emails have played a significant role in each association because of their convenience, and accessibility. A few plugins are accessible in the market that work wonders in order to configuring each part of email notifications. In Jenkins, we will see one of them. Jenkins email notification is based on Java plugin tool and it plays an important role in continuous Integration as it is used to send the notification alert automatically when an email is received.

In this video, we are looking at how to install LeoCAD on Zorin OS 16.

Today we are looking at how to install Sonic Robo Blast 2 on a Chromebook. Please follow the video/audio guide as a tutorial where we explain the process step by step and use the commands below.

VMware Workstation Pro (known as VMware Workstation until release of VMware Workstation 12 in 2015) is a hosted hypervisor that runs on x64 versions of Windows and Linux operating systems (an x86-32 version of earlier releases was available); it enables users to set up virtual machines (VMs) on a single physical machine and use them simultaneously along with the host machine. Each virtual machine can execute its own operating system, including versions of Microsoft Windows, Linux, BSD, and MS-DOS.

In this installation guide, we will show you how to install InvoicePlane on Ubuntu systems

InvoicePlane is a self-hosted open source application for managing your quotes, invoices, clients and payments.

It is specially designed for business owners to create and manage their invoices and client payments.

In this small guide, we will show you how to install MakeMKV on Ubuntu 20.04 with two methods.

MakeMKV is a DVD and Blu-ray ripping software. It is a free MKV video maker for Linux, Windows and MacOS. Using this you can convert your favorite videos from DVD and Blu-ray discs to MKV aka Matroska Video format.

A Blu-ray ripper is a computer program that facilitates copying a Blu-ray disc or HD DVDs to a hard disk drive.

In this small guide, we will show you how to install MakeMKV on Ubuntu 20.04 with two methods.

The secure socket shell (SSH) is preferred connection mechanism, especially when compared to HTTPS, when connections are made from Git to a remote server like GitLab, GitHub or BitBucket.

In this Git tutorial, we will show you how to configure SSH keys in order to securely connect your local Git instance with your remote repositories.

Nigel's Monitor (nmon) is a system performance monitoring tool originally developed by IBM for the AIX operating system and later ported for Linux on several CPU architectures.

The main benefit of nmon is that it allows you to monitor different aspects of your system, such as CPU utilization, memory, disk busy, network utilization, and more, in a single, concise view. Without nmon, you have to use specialized monitoring tools like top for processes, iostat for disks, and ifstat for the network to monitor various resources. Each of them presents the data differently.

I used nmon for the first time about 10 years ago as an AIX sysadmin. By using nmon, I was able to troubleshoot some hard-to-spot issues, including one that initially seemed like a network bottleneck. By inspecting several resources simultaneously using nmon, I discovered it was an application issue caused by opening too many files.

In addition to interactively monitoring your system, you can also use nmon in batch mode to collect and save performance data for analysis. For more information about nmon for Linux, consult the project's official page.

This article looks at this powerful monitoring tool. Start by installing it.

We have recently covered an article on the UUID of disk storage, where we discussed why we need UUID, how to retrieve it, and all. It is important to have a UUID when you want to automount your drive. If you don’t know what UUID is, then I highly recommend you read that article first. How to find the UUID of disk storage with a simple command.

And in this article, you will see how to automount disk or USB in Linux, and I believe these steps will work in all Linux distributions(Ubuntu, Debian, Arch, Almalinux) without any hustle.

Wine 7.x has just been released! Follow this tutorial to learn how to install Wine on Debian 11. Wine 7 is the current stable release as of this writing, hence this guide is about how to install 7.x on Debian 11. Wine (Wine Is Not an Emulator) is a program which allows running Microsoft Windows programs (including DOS, Windows 3.x, Win32, and Win64 executables) on Unix. It consists of a program loader which loads and executes a Microsoft Windows binary, and a library (called Winelib) that implements Windows API calls using their Unix, X11 or Mac equivalents. The library may also be used for porting Windows code into native Unix executables.

Follow this tutorial to learn how to install Wine on Ubuntu 22.04. Wine is a free and open-source software which provides the ability to run Microsoft Windows applications and computer games to run on POSIX-compliant Operating Systems, such as Linux, MacOS and BSD.

Brave is a free and open-source web browser developed by Brave Software, Inc. based on the Chromium web browser. Brave is a privacy-focused internet browser that sets itself apart from other browsers by automatically blocking online advertisements and website trackers in its default settings.

Brave claims that its browser puts less strain on your computer’s performance than Google Chrome. Even with multiple tabs open at once, the new Brave Software uses 66% less memory and has 50 million more active users than before – a growth of 2X in 5 years!

In the following tutorial, you will learn how to install Brave Browser on Ubuntu 22.04 LTS Jammy Jellyfish.

Memcached is a free, open-source project that anyone can use to speed up response times for dynamic websites. As the software lives in RAM and not on external storage devices like hard drives or SSDs, does it allow you to take advantage when your website needs information quickly without having to wait anywhere from seconds until to almost minutes on high traffic websites that are not optimized correctly with software such as Memcached.

In the following tutorial, you will know how to install and configure Memcached on your Ubuntu 22.04 Jammy Jellyfish, along with some basic configuration examples.

Ubuntu Kylin is the official Chinese version of Ubuntu however supports English. It has been described as a “loose continuation” to its parent operating system with some differences in appearance and functionality. Still, most importantly, it’s explicitly designed for approval in mainland China, but international users are welcome to use it.

In the following tutorial, you will learn how to install Kylin Desktop Environment on Ubuntu 22.04 LTS Jammy Jellyfish.

Note installing Kylin desktop will be hard to remove and restore your original desktop however you can swap back to the default GNOME desktop and keep it installed. The recommendation is to install Kylin or any alternative desktop environment on a Virtual Machine to test before a complete upgrade.

GNOME Flashback is a free open-source session for GNOME 3, initially called “GNOME Fallback” and shipped as a stand-alone session in Debian and Ubuntu. It provides a similar user experience to the GNOME 2 desktop but uses the newer GTK+ 3 toolkit and associated technologies. The project aims to keep the functionality of GNOME 2 available until all significant applications have been ported to GTK+ 3.

In the following tutorial, you will learn how to install the GNOME Flashback desktop environment on Ubuntu 22.04 LTS Jammy Jellyfish.

Dirt Rally is a racing simulator developed and published by Code Masters for Microsoft Windows and PS4, and Xbox One. Later on, after its release, it made its way to Linux and Mac OS. Here’s how you can play it on your Linux PC.

In this article we will learn How To Visualize Disk Space Usage With Vizex. Vizex is a command line program to display disk usage for all partitions and media in graphical layout. Output of Vizex shows the total size, total used space, free space and percentage of used space of each partition in a horizontal bar chart-like diagrams.

We can customize the output as per our liking using various options. For example, we can display the visualized disk usage of a specific path. We can exclude specific partition details from the output. We can save the partitions full information in a csv or json file. It is even possible to display the battery information of a Laptop using Vizex. Vizex also has a feature to print the directory contents with size, file types, and last modified date.

This post is about WebLogic don’t start. So we are going to fix it.

I hate java and its ecosystem. Some days ago one of our WebLogic run out of disk space and the process died.