DevOps Classroomnotes 04/Oct/2023

Ansible Contd

Authentication in Linux or Credentials

• Linux uses SSH (Secure Shell) for connecting to other instances
• There are two types of credentials
  • username and password
  • username and key pair

Lab Setup

• Overview
  
• We will create a user called as devops on server 1 and server 2
• Enable password based authentication
• Try to login from server 1 to server 2 using devops user

Solution

• Enable password based authentication
  • check the value of PasswordAuthentication in file /etc/ssh/sshd_config and change it to yes
  • Restart sshd sudo systemctl restart sshd
• Create a user called as devops

sudo adduser devops

• Now repeat the above steps on server 2
• Now from server 1 connect to server2 ssh devops@<server2-ip>

Exercises

• Login into linux vms from your laptop
• establish ssh between two vms in cloud
• changing file permissions
• using sftp and ssh
• Learn using vim Refer Here or nano editor
• Release cycle of ubuntu and Release cycle of Redhat