AWS : Connect EC2 in Terminal (Ubuntu) & Installing Apache2.

Prerequisite :

1. Make sure the EC2 instance running in AWS.
2. Key-pair to connect EC2

Step#1 :

Open the terminal in Ubuntu OS and move to directory where *.pem file saved in local. Then verify the file permission of the file.

devops@kaniyam:~/Desktop/Ponnarasu/Devops$ stat -c %a Ubuntu_Demo_server_key.pem
644

Step#2 :
Change the File permission to 600, which mean, only owner has access to read and write file and other doesn't have access.

devops@kaniyam:~/Desktop/Ponnarasu/Devops$ chmod 600 Ubuntu_Demo_server_key.pem
devops@kaniyam:~/Desktop/Ponnarasu/Devops$ stat -c %a Ubuntu_Demo_server_key.pem
600


Step#3 :
Connecting EC2 instance in Terminal by SSH.( SSH terminal should be open in EC2 ).

devops@kaniyam:~/Desktop/Ponnarasu/Devops$ **ssh -i Ubuntu_Demo_server_key.pem ubuntu@3.98.120.128**
The authenticity of host '3.98.120.128 (3.98.120.128)' can't be established.
ED25519 key fingerprint is SHA256:lNe/eooCjYSwIbu3p5HkbkB+WoW6I897bn0TaCBAYss.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '3.98.120.128' (ED25519) to the list of known hosts.
Welcome to Ubuntu 22.04.3 LTS (GNU/Linux 6.2.0-1012-aws x86_64)

Step#4 :
Update the Ubuntu OS

ubuntu@ip-172-31-1-176:~$ **sudo apt-get update**
Hit:1 http://ca-central-1.ec2.archive.ubuntu.com/ubuntu jammy InRelease
Get:2 http://ca-central-1.ec2.archive.ubuntu.com/ubuntu jammy-updates InRelease [119 kB]


Step#5 :
Set/update the root password using below command.

ubuntu@ip-172-31-1-176:~$ **sudo passwd root**
New password:
Retype new password:
passwd: password updated successfully

Step#6 : Command to find the Public IP in terminal.

`ubuntu@ip-172-31-1-176:~$ curl ifconfig.me
3.98.120.128

ubuntu@ip-172-31-1-176:~$ curl icanhazip.com
3.98.120.128

ubuntu@ip-172-31-1-176:~$ curl http://checkip.amazonaws.com
3.98.120.128
`

Installing APACHE2 in Instance.

buntu@ip-172-31-1-176:~$ sudo apt install apache2
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following additional packages will be installed:

Start :
ubuntu@ip-172-31-1-176:~$ sudo systemctl start apache2
ubuntu@ip-172-31-1-176:~$ sudo systemctl enable apache2


Status :
ubuntu@ip-172-31-1-176:~$ sudo systemctl status apache2


Open the Apache Webserver in Firefox.

Failed to Open.

Cause :
Only SSH port is on the EC2 Instance, so Apache server not connecting.

Adding http: port in the security group .

Step#1 :
Existing Security Group :

Step#2 :
Add rule by clicking the "Add Rule" button.

Step#3 :
Choose the Type as "HTTP" and select source as "0.0.0.0/0" to connect the public IP from anywhere.

After adding the New security rule.

Refresh the Apache page :