1. Flask
2. PostgreSQL
3. Sqlalchemy
4. Oatu2Client
5. psycopg2

1. Set up grader
	- $ sudo adduser grader
	- Add "grader ALL=(ALL:ALL) ALL" text into the /etc/sudoers.d/grader
	- Set grader password using:
		$ passwd grader
	- I set it as "P@ssw0rd!123"
	
2. Create key pair for grader and added into grader's authorized key
	- (local machine)$ssh-keygen
	- set the private key file to grader.rsa and copy to ~/.ssh/
	- set the public key file to grader.pub and also copy to ~/.ssh/
	- $sudo mkdir /home/grader/.ssh
	- $sudo nano /home/grader/.ssh/authorized_keys
	- put the content of the grader.pub into this authorized_keys file and save
	- restart the ssh to make change effective: $sudo service ssh restart
	- Now the grader can login with the rsa file like:
		$ ssh -i ~/.ssh/grader.rsa [email protected]

3. Disabled root login
	- Clear up everything from the root ssh keys:
		$ sudo nano /home/root/.ssh/authorized_keys
		
4. Change the ssh port to 2200
	- Enable the port 2200 from lightsail firewall portal
	- Edit the sshd_config by: 
		$ sudo nano /etc/ssh/sshd_config
		- change Port 22 to Port 2200
		- change PermitRootLogin to PermitRootLogin no
		- change PasswordAuthentication to PasswordAuthentication no
	- restart the ssh to make change effective: $sudo service ssh restart
	- Now the grader can login with the rsa file like:
		$ ssh -i ~/.ssh/grader.rsa [email protected] -p 2200
	
5. Enabled firewall and only allow 80, 2200 and 123 port connections
	- login ssh and configure the firewall and ports
		$ sudo ufw default deny incoming
		$ sudo ufw default allow outgoing
		$ sudo ufw allow 2200
		$ sudo ufw allow 2200/tcp
		$ sudo ufw allow 80
		$ sudo ufw allow 80/tcp
		$ sudo ufw allow 123
		$ sudo ufw allow 123/tcp
	- After configured, activate the firewall and check the status to confirm
		$ sudo ufw enable
		$ sudo ufw status

6. Updated all the package
	- $ sudo apt-get update
	- $ sudo apt-get upgrade
	
7. Install Apache, WSGI, and Git, followed by installing my catalog project
	- install the apache 2: $ sudo apt-get install apache2
	- install WSGI for Apache:
		$ sudo apt-get install python-setuptools
		$ sudo apt-get install libapache2-mod-wsgi
	- Enable WSGI: 
		$ sudo a2enmod wsgi
	- Restart apache:
		$ sudo service apache2 restart
	- we can check to see if the default Apache page is loaded or not by visiting the IP address:
		http://54.213.242.166
		
	- install the Git: $sudo apt-get install git-all 
		
8. Create and set up the PostgreSQL database
9. Configure the catalog project to make it able to be enabled in public using flask
	- renamed the original view.py to __init__.py
	- updated all the engine from  
		engine = create_engine('sqlite:///catalog.db')  
	  to
	  	engine = create_engine("postgresql://catalog:catalog@localhost/catalog")
		
	- Change the application run statement from 
		app.run(host='0.0.0.0', port=8000)
	  to
	  	app.run()

10. Configure the PSQL  database to support the catalog project
11. Added the new public domain url to my google key 

1. SSH
2. Terminal
3. AWS Lightsail web portal
4. Udacity Forum