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.
kubectl command examples (cheat sheet)
The kubectl command is the primary way of interacting with your Kubernetes cluster. It is safe to say that Linux administrators will be using the command on a constant basis when they are in charge of a Kubernetes environment. However, due to the sheer amount of command options available, it can be intimidating for newcomers and tricky to learn. Even longtime users may forget a command every once in a while and that is why we have created this tutorial full of
kubectl command examples.
How to manage and troubleshoot Kubernetes logs
Kubernetes is open source software that allows us to manage containerized applications across node systems. When it comes to managing a Kubernetes cluster, one of the most important aspects of administration is to keep constant tabs on the logs. These logs give us valuable information about the performance and overall health of our Kubernetes cluster. In this tutorial, we will see how to manage and troubleshooting Kubernetes logs on a Linux system.
How to Install Kubernetes on All Linux Distros
Kubernetes is container orchestration software that allows us to deploy, manage, and scale containerized applications across any number of node systems. It is a powerful and open source technology which makes it far more efficient to run applications at scale, and supersedes the traditional way of running applications directly on the operating system or in a virtual machine. A Kubernetes cluster also introduces self healing, load balancing, and a way to manage hundreds or thousands of containerized application from a single command prompt.
How to Manage Kubernetes Clusters With kubectl
kubectl command is how administrators interact with and manage a Kubernetes cluster on a Linux system. It is an essential command line tool that works with all Kubernetes cluster envrionments like Amazon Web Services, Google Cloud Platform, or a cluster on your own hardware (e.g., kubeadm). Managing Kubernetes clusters at scale can be a challenge at first, but mastering the
kubectl command will make it much easier.
How to Deploy an Application in Kubernetes
Kubernetes gives system administrators the means to manage containerized applications. To get started, we need to deploy an application inside of our Kubernetes cluster. From there, Kubernetes will manage many aspects of our application, plus give us tools to interact with it as needed. In this tutorial, we will go through the step by step instructions to deploy an application in Kubernetes on a Linux system.
How to use disk quota on Linux with examples
Implementing a disk quota will prevent users or groups from using too much storage space on a Linux system. This is very useful on systems such as file servers that allow many users to connect and store data, as it ensures that no particular user can utilize an unexpected amount of storage and interrupt storage or processes on the server by making it run out of disk space. Linux administrators should always put a quota on the maximum storage usage for users, as well as other user environment limits like max number of processes and open files.
Linux: Setup Mail server
Setting up a mail server on a Linux system is useful for hosting email for a domain name, or even just to have local email capabilities. Local email in itself is a convenient feature on a machine used by many users, and even if there is no such traffic, many services dump their reports and messages into e-mails, which is delivered to the root user locally, so the sysadmin will be notified on any events of interest when they log in and switches to root user.
Setup FTP server on Linux
FTP, which stands for “File Transfer Protocol,” is a useful way for transferring files between a client and a server. Depending on the permissions granted to a user, they can traverse directories on the server, download the files to their local computer, and also upload files from their computer to the server. Usually, servers are kept secure by only allowing users with accounts to login via FTP, but it is also possible to configure anonymous authorization, which allows anyone to connect to the server to download and/or upload files.
Linux Configuration files: Top 30 most important
Linux is a powerful and flexible operating system, and one of its strengths is the abundance of configuration files that allow you to customize its behavior to your needs. In this article, we will be taking a closer look at some of the most important and widely-used Linux configuration files. From setting environment variables to managing authentication, these files play a critical role in ensuring that your Linux system runs smoothly and securely. Whether you’re a seasoned Linux administrator or just starting out, this article will provide valuable insights into the inner workings of the Linux operating system.
Graphical user interface (GUI) applications for managing MySQL
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.
Solving the ‘Segmentation Fault’ Error on Linux
Segmentation Fault error (often called just
segfault) is usually related to a memory issue whereby a process tries to access unallocated memory that does not belong to it, and the Linux kernel ends up terminating the process and issuing the error as a means to mitigate further issues. It can be tricky to diagnose and usually does not give us much to go off of, so we must dig through log files and try a variety of methods to figure out the root problem. In this tutorial, we will go through step by step instructions to solve the
Segmentation Fault error on a Linux system.