In order to have a logical separation for different groups of resources, Kubernetes gives us the namespaces feature. It is also convenient when you have a big environment that is managed by multiple users or teams, and each one needs their own “space” for the resources that they are assigned to manage and administer. This is a much better solution than creating numerous Kubernetes clusters just to facilitate different groups of services or deployments, and to isolate teams to their own space.
One of the most important features of Kubernetes is the ability to easily scale our containerized applications. This allows administrators to deal with increased traffic by adding more replicas that can handle the uptick in activity. Kubernetes can handle the load intelligently by distributing the work evenly to pods in the cluster, ensuring that none of them become overwhelmed.
Kubernetes offers administrators a way to update our hosted services and containerized applications without having any downtime. This is accomplished through rolling updates, which will update the application in one replica at a time, so that users accessing the service can continue without interruption. After a little time, every replica will have undergone the issued update.
The cron scheduler in Kubernetes works very similarly to that of a typical Linux system. This should make it a bit easier for seasoned Linux users that have done their share of crontab editing in the past. However, there is still a specific way to create cron jobs in Kubernetes and a syntax that your YAML file must follow.
Running containerized WordPress in a Kubernetes cluster is a fantastic way to make sure that your website can horizontally scale with increased traffic demands. In this tutorial, we will see how to deploy a WordPress website in a Kubernetes cluster on a Linux system. We will be using the easy method, which is via the helm package manager for Kubernetes. Afterwards, it is simple enough to customize the install to fit your needs.
When working with MySQL, it can be very difficult to visualize an entire database of information, especially if there are relational databases that all work in tandem to present data. Fortunately for us, there are numerous GUI based applications that can be downloaded and installed on a Linux system that make the process of managing databases much easier. Many users prefer interacting with MySQL through a GUI rather than a command line, where it is difficult to visualize multiple columns of data and understanding how they correspond to each other.
Git is normally used from the command line, but users interacting with lots of repositories on a regular basis may find it easier to use a GUI based application for Git. A GUI based Git application can provide visual representation of Git repositories, which makes them easier to make sense of. Many apps also have user friendly interfaces that are easy to use as opposed to memorizing a bunch of Git commands.
Many Linux users like to stick to the command line whenever possible, even when editing documents. However, a GUI based text editor is much better suited for certain types of document editing, such as for a school paper or other lengthy document. A GUI text editor allows us to visualize the paper as it would appear once printed, and see where each new page is separated.
GUI based network managers can make it easy to configure the IP, DNS, and routing settings for your Linux system, as well as manage the configured VPNs, known WiFi networks, etc. Users that join many different networks, have multiple VPNs configured, or need to frequently change their networking settings may find it easier to do so in a GUI application rather than fiddling with the command line and
ip commands. A network manager provides a centralized location that can keep track of all your settings and even build profiles to quickly change between various presets.
Yum is a package manager for Linux systems that rose to prominence for being the default package management system for Red Hat Enterprise Linux and its derivative distributions for many years. It has since been replaced by dnf package manager, which is a fork of yum that has been developed to be faster, more efficient, and have better documentation. Modern Linux distros only use yum as a compatibility layer for dnf, in order to accomodate legacy Bash scripts and old commands.
Homebrew (or just “Brew”) is a package manager that is well known as the go-to package management tool for MacOS, but it also works on Linux systems. It has been providing Apple users with a means of installing Linux packages on their devices for many years now, and the development has since expanded it into a tool for Linux as well. Homebrew is free and open source, and its big catalog of installable software has made it an attractive supplement to built in package managers such as apt and dnf on some systems.
One of the most important aspects of Linux system administration is to set up logging of critical and important events, and regularly audit your server for weaknesses or errors. Since Linux servers are typically powered on 24/7, administrators must rely on logging and auditing tools to help them keep track of what is happening on the system throughout the day. These useful tools can collect and summarize mass amounts of data, notify the sysadmin when a critical event occurs, and identify trends and potential issues.