Two ways to install Jenkins

Step to install jenkins on AWS
How can you easly setup jenkins on AWS ec2 instance(Ubuntu)

Step 1
Install java

Update your system
sudo apt update

Install java
sudo apt install openjdk-11-jre

Validate Installation
java –version

It should look something like this
openjdk 11.0.17 2022-10-18
OpenJDK Runtime Environment (build 11.0.17+8-post-Ubuntu-1ubuntu222.04)
OpenJDK 64-Bit Server VM (build 11.0.17+8-post-Ubuntu-1ubuntu222.04, mixed mode, sharing)

Step 2
Install Jenkins
Just copy these commands and paste them onto your terminal.
curl -fsSL https://pkg.jenkins.io/debian/jenkins.io.key | sudo tee \ /usr/share/keyrings/jenkins-keyring.asc > /dev/null echo deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc] \ https://pkg.jenkins.io/debian binary/ | sudo tee \ /etc/apt/sources.list.d/jenkins.list > /dev/null

Add Repository Key
You have to add Jenkins repository into Ubuntu server, use below command for that.
wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -
Add Package Repository
Use below command to add package repository
sudo sh -c 'echo deb http://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list'
Now, to update the server you have to use below command;
sudo apt update

Now, you can use below command to install Jenkins
sudo apt install jenkins -y
Once jenkins installation completed you have to start Jenkins service for that use below command
sudo systemctl start jenkins
sudo systemctl status jenkins

Unlock jenkins
sudo cat /var/lib/jenkins/secrets/initialAdminPassword
And get the password.

Install jenkins using Docker
First of all stop all the running jenkins

Check the status of running jenkins

sudo systemctl status jenkins

Install docker first.

Command to install docker

sudo apt install docker.io Y

Command to install jenkins using docker

sudo docker pull jenkins/jenkins

sudo docker run -d -p 8080:8080 docker.io/jenkins/jenkins:latest

Now you can access jenkins with port 8080
Ip address of your instance:8080(http://54.178.81.5:8080/)

Now we have to unlock jenkins first

How to get the password

sudo docker exec -it <container_id> bash //come inside the container

cd /var/jenkins_home/secrets
cat initialAdminPassword

And get the password and copy paste into jenkins and install all the suggested password.