• Click on EC2 under Services and click on Launch Instance. A new webpage will open. Now give a name to your instance for your reference under the Name and tags heading.

• Scroll down to Application and OS Images (Amazon Machine Image). Under Quick Start, select Amazon Linux and choose the AMI which is free tier eligible to try out this service free of charge.

• Now move towards the Instance type and look for t2.micro. This instance type provides enough computing power to carry out the lab. Now create a new key pair for Key pair (login).

• A new dialog box will appear. Enter a name for your key pair and select RSA to encrypt the public key as it is secure and based on the mathematical properties of large prime numbers, setting up a secure communication channel. Now select the .pem private key file format for secure transmission of cryptographic keys and click on Create key pair. A public key with a .pem extension will be downloaded to your computer.

• Make sure that Auto-assign Public IP is enabled under the network settings for your instance to receive a public IP address automatically. Under Firewall and security groups, select an existing security group and choose the default VPC. Leave other settings and configurations to default and click on Launch Instance.

• Now open PuTTYgen and select RSA under the type of key to generate. Click on Load and select the .pem key that we generated earlier through the AWS key pair. If you cannot find your key pair, then select the file extension to All Files (*.*), click Open, and save the private key.

• Go back to your AWS instance and click on the Instance ID. From there, copy the public IP address of your instance.

• Open PuTTY and paste the public IP address under the Host Name.

• Navigate to Category under the Connection settings and select SSH/Auth/Credentials. Attach the private key file for authentication and click Open.

• A console version of PuTTY will open. Here, you can practice your Linux commands for today’s practical. Run your first command, ec2-user, to ensure you have the necessary permissions to configure and maintain your instance while using best practices for security and system administration.

Linux commands to Practice as a DevOps Engineer

• grant’s super user privileges and logs you in as the root user for the duration of your terminal session.

sudo su

• To view what’s written in a file.

cat

• To remove a directory/ Folder.

rm -r

• To view top 10 lines of a file

head

• To view last 10 lines of a file

tail

• To search for matching patterns in file

grep

• To Sort the lines in filename in a case-insensitive manner.

sort -f

• use to find the difference between two files

diff

• Display current processes.

ps -u

• To change file permission for owner, group and others

chmod

• To change the ownership of files

chown

• Kill a process by name

pkill