How to install yum in redhat 5 step by step

The system should begin the installation. Once it finishes, it will notify you the installation is complete and which version of Docker is now running on your system. Your operating system may ask you to accept the GPG key. This is like a digital fingerprint, so you know whether to trust the installation. To start the service, enable it to run at startup.

Run the following commands in the order listed below. To install a specific version of Docker , start by listing the available releases. The system should give you a list of different versions from the repositories you have enabled above. Docker installation on CentOS 7 is a bit easier than installing on Ubuntu. If you followed this guide, you should have successfully installed Docker on your CentOS 7 machine. Now you can explore the wonderful world of Docker. If system is registered with RHN network and subscription is active, default configuration is sufficient to install software packages.

If system is not registered with RHN network, it will never be able to connect with Red Hat official repositories. Before we create repository, we need to get all necessary RPM package files. As we know repository is operating system specific, we have to use the same disk which we used to install the operating system. If Centos is installed then we have to use the Centos installation disk.

Here UserName is the name of logged in user. Create a directory. Since this directory will be used to store all RPM package files from disk, make sure we have sufficient at least 4GB free disk space. Yep, you got it right. Yum command uses repository configuration files to figure out the available repositories. By default yum is configured to use online repositories. If repository server is compromised, a hacker may put some fake packages in repository or may change existing packages.

If these packages are installed in system, the system may get hacked also. The GPG key is the counter measurement of this kind of security threat. The packages in repository are signed with GPG key. The owners of packages also provide the GPG keys. With GPG key yum can check whether the package is in its original state or has been modified in repository. Since in our local repository we put all packages from original installation disk, there is no need to enable the GPG check feature.

As output confirms that our repository name — rhcerepo and id - rhcerepo is ready to use. Currently this repository contains packages. Now we have a working repository, in remaining part of this tutorial we will learn how to use the repository. The yum command is used to work with repository. To install, remove or update a package we first need to know the exact name of the package. Make a note of the entry and use it to join worker nodes to the cluster at a later stage. Note: This tutorial uses the flannel virtual network add-on.

The A Pod Network allows nodes within the cluster to communicate. There are several available Kubernetes networking options. Use the following command to install the flannel pod network add-on:. If you decide to use flannel, edit your firewall rules to allow traffic for the flannel default port Once a pod network has been installed, you can confirm that it is working by checking that the CoreDNS pod is running by typing:. As indicated in Step 1 , you can use the kubeadm join command on each worker node to connect it to the cluster.

Replace the codes with the ones from your master server. Repeat this action for each worker node on your cluster. You have installed Kubernetes on CentOS successfully and can now manage clusters across multiple servers.

If you have bare metal server, you may want to look into our guide on how to install Kubernetes on such servers. This Kubernetes tutorial provides a good starting point for exploring the many options this versatile platform has to offer.

Use Kubernetes to scale your operations more efficiently and spend less time on micromanaging containers. For beginners who still have no experience of deploying multiple containers, Minikube is a great way to start. Minikube is a system for running a single node cluster locally and is excellent for learning the basics, before moving on to Kubernetes.

Introduction Small virtual environments, called containers , have become indispensable for developing and managing applications. Follow this tutroial and learn how to install Kubernetes on a CentOS 7 system.