Installing Docker on CentOS 9 Stream

Installing Docker on CentOS 9 Stream

Docker has become a crucial tool for developers, enabling them to package applications into containers, which are standalone executable packages containing everything needed to run a piece of software, including the code, runtime, libraries, environment variables, and config files. This article will walk you through the process of installing Docker on CentOS 9 Stream, breaking down each step to ensure a smooth and successful installation.

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CentOS Package Management: Top 20 Command Examples for System Administrators

CentOS Package Management: Top 20 Command Examples for System Administrators

Managing packages is a crucial aspect of system administration and development in Linux environments, such as CentOS. This guide is designed to introduce you to the top 20 most common examples of package manager usage on CentOS. Whether you are a new system administrator or a seasoned developer, understanding these examples will help you effectively manage your CentOS system’s packages, ensuring it runs smoothly and securely.

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Redhat Disable Firewall - start, stop, enable, disable

Redhat Disable Firewall – start, stop, enable, disable

firewalld is the default firewall on Red Hat Enterprise Linux, and it’s enabled by default, but it’s possible to disable the firewall on Redhat, and you’ll also see how to check firewall status in Linux. Normally, there should not be a need to disable the firewall, but it may be quite handy for testing purposes or other scenarios. In this tutorial, you’ll see how to check the status of firewalld, enable or disable the service from starting automatically upon system boot, and how to stop or start the firewalld service in RHEL.

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Identifying the CentOS Release version

How to check CentOS version

The purpose of this tutorial is to show how to check the CentOS version of your Linux system. It’s possible to do this from either command line or GUI, so you can use whichever method is more convenient for you. Classic CentOS is nearing its end of life and will be replaced by CentOS Stream. Knowing your CentOS version will give you some insight into how long your system will continue to be supported.

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How to Install Kubernetes on Rocky Linux

How to Install Kubernetes on Rocky Linux

Kubernetes has quickly risen in popularity as the go to solution for deploying containerized applications inside of a cluster. It gives administrators many options for scaling applications, and offers advanced features like rolling updates and self healing. To get started learning about Kubernetes or to test your containerized applications in a deployment scenario, installing minikube will help immensely.

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How to fix: user is not in the sudoers file error

How to fix: user not in sudoers file error

The purpose of this tutorial is to show how to fix the RHEL7 User Not In Sudoers File Error on all major Linux distributions. When trying to execute Linux commands with root privileges via the sudo command, you will receive an error message if the current user is not in the sudoers file. This is a security feature on Linux systems to stop ordinary users from esclating their commands to administrator privileges.

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How to install Flatpak on CentOS

How to install Flatpak on CentOS

Flatpak is a package manager that is available for installation on CentOS Linux and all other major Linux distros. Flatpak offers CentOS users an alternative to the official repos and default dnf package manager as a source of software installation. Many applications available in Flatpak currently do not reside in official CentOS repos, making this a big benefit of installing Flatpak.

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Check RPM package dependencies on Rhel/Centos/Rocky

Check RPM package dependencies on Rhel/Centos/Rocky

Files with the .RPM extension are software packages intended for installation on Red Hat Enterprise Linux or one of its derivative Linux distributions, such as CentOS, AlmaLinux, Rocky Linux, or Fedora. When you install software by using an RPM file, your system may need to install dependencies for it to run correctly. This is common behavior for the dnf package manager as well, so you may already be familiar with package dependencies. In this tutorial, we will show you how to check the package dependencies for an RPM file on RHEL and similar distros.

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