QA on Ansible
Q.1 What is Ansible and what are its features? Ansible is an open-source automation tool that helps the deployment, configuration management, and orchestration of IT infrastructure. It is designed to automate repetitive tasks and you can configure lot of things using this tool.It is Agentless. Ansible uses a push-based architecture so it does not require […]
Sudo in Linux
Sudoers file is a file which plays a very important role in managing user and group access which can be performed on system. You can assign privileges to users and groups as per requirement. Root is super user and have all access. You can also provide root level access to normal user. Root user has […]
Configure Static IP Address in Ubuntu 20.04.6 LTS
For configuring static IP Address in Ubuntu Server you need to make netplan configuration changes in /etc/netplan/ directory. # cd /etc/netplan/ Now go and edit the configuration file there named “00-installer-config.yaml” and add below configuration for static IP address: (Bold are added lines) # vi 00-installer-config.yaml # This is the network config written by ‘subiquity’ […]
How to install Ansible and enable passwordless SSH authentication with nodes on Linux
Step1: Install Ansible: # yum install ansible Step2: Generate an SSH key pair on the control node: # ssh-keygen Go for default options for key name and location and leave passphrase blank. Step3: Copy the public key to the remote nodes from control node. # ssh-copy-id username@remote_host (Put username and hostname of remote machines) Step4: […]
User and Group Management
Any User can be assigned to any physical user or accounts that exists for specific application to use. Each user is assigned with a unique numerical identification number called UID. User ID (UID) 0-999 reserved for system purpose and we can create other user with 1000+.Groups are logical expression of organization where multiple users can […]
Useful openssl Command Examples
Check version of openssl: # openssl version Print available commands for openssl: # openssl list -standard-commands or # openssl help Check SSL certificate of mentioned URL: # openssl s_client -connect varelite.com:443 -showcerts To generate rsa key: # openssl genrsa -out testing.key 2048 Generate CSR and RSA key: # openssl req -out testing.csr -newkey rsa:2048 -nodes […]
QA on DevOps
Q.1: What are the most common DevOps tools we use and let us know benefits of them. The most DevOps tools are Ansible, Puppet, Chef, Git, Jenkins, Bamboo, Docker, Docker Swarm, Kubernetes, Openshift, Nagios etc. Few details are as: Ansible, Puppet are configuration Management tool. Git is versioning tool. Docker is used for container services. […]
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