Pre Setup Once you’ve gained access to your terminal it might be wise to spend ~1 minute to setup your environment. You could set these: alias k=kubectl # will already be pre-configured export do=”–dry-run=client -o yaml” # k create deploy nginx –image=nginx $do export now=”–force –grace-period 0″ # k delete pod x $now Vim The […]
kubectl autocomplete – Enabling and Using in Bash
Setting Up Kubectl Autocomplete in Your Shell Environment Setting up kubectl autocomplete depends on the shell you’re using. Here are the options for the most common shells. Remember to replace kubectl with your chosen alias if you’re using one. For instance, if you’ve aliased kubectl as k, replace kubectl with k in the scripts below. […]
kubectl Quick Reference
Kubectl autocomplete BASH source <(kubectl completion bash) # set up autocomplete in bash into the current shell, bash-completion package should be installed first. echo “source <(kubectl completion bash)” >> ~/.bashrc # add autocomplete permanently to your bash shell. You can also use a shorthand alias for kubectl that also works with completion: alias k=kubectl complete -o default […]
Kubectl Cheat Sheet
Introduction Kubernetes is a famous container orchestration tool that is very popular in modern software development. If you are using Kubernetes, you must have used Kubectl, which is the command line tool to manage your Kubernetes applications. This guide will walk you through the most frequently used commands for Kubectl. Not only will we discuss […]
Install Terraform on CentOS Using Package Repository
The HashiCorp repository contains other non-Terraform packages that will be available for installing after you add the repository. Follow the steps to install Terraform from the official HashiCorp repository on a CentOS system. 1. Install the yum-utils tools: sudo yum install -y yum-utils 2. Add the HashiCorp repository: sudo yum-config-manager –add-repo https://rpm.releases.hashicorp.com/RHEL/hashicorp.repo 3. Finally, install Terraform using […]
How to reset the admin password on GitLab
Gitlab admin password can be changed easily by using GitLab-rails command. We may have chance of forgetting GitLab admin password, so if we do we actually don’t need to reinstall GitLab just follow the simple steps to reset your GitLab admin password. This tutorial covers the ground on resetting the admin password on Gitlab. execute […]
Install Jenkins on Rocky Linux 9
Configure jenlkins repo. sudo wget -O /etc/yum.repos.d/jenkins.repo \ https://pkg.jenkins.io/redhat-stable/jenkins.repo sudo rpm –import https://pkg.jenkins.io/redhat-stable/jenkins.io-2023.key sudo yum upgrade # Add required dependencies for the jenkins package sudo yum install fontconfig java-17-openjdk sudo yum install jenkins sudo systemctl daemon-reload Weekly release A new release is produced weekly to deliver bug fixes and features to users and plugin developers. […]
Deploy a Docker registry server with Authentication
Before you can deploy a registry, you need to install Docker on the host. A registry is an instance of the registry image, and runs within Docker. Install docker service with bellow commands. dnf config-manager –add-repo=https://download.docker.com/linux/centos/docker-ce.repo dnf install -y docker-ce –nobest systemctl enable –now docker dockerstatus=`systemctl status docker | grep “active (running)”` echo “Docker Service […]
How To Save All Docker Images And Copy/Move To Another Host?
Follow the below steps to export all docker images and import them to another system. Step #1 Export or save all images to one tar file. docker save $(docker images –format ‘{{.Repository}}:{{.Tag}}’) -o allimages.tar Step #2 scp -i key.pem rocky@192.168.1.1:/tmp/allimages.tar . Step #3 Load all images to docker on new host. docker load -i allimages.tar
Setup SCTP In Red Hat / CentOS Linux 8
1. Install kernel-modules-extra and SCTP for the currently installed kernel; yum install kernel-modules-extra-`uname -r` yum install -y lksctp-tools lksctp-tools-devel lksctp-tools-doc 2. Add sctp to /etc/modules-load.d/* to load sctp before systemd-sysctl.service during boot. Loading sctp before systemd-sysctl.service allows the sctp sysctl.conf settings to be effective; # cat /etc/modules-load.d/sctp.conf sctp 3. sctp is blacklisted by default on […]