sudo apt update
sudo apt upgrade

curl -sL https://deb.nodesource.com/setup_18.x | sudo -E bash -
sudo apt install nodejs

node --version

UPDATE NODEJS VERSION (Optional)
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.7/install.sh | bash
source ~/.bashrc
nvm install v20.5.1

git clone https://github.com/...repo

#To add env file to your folder in ec2 instance 
nano .env

npm i pm2 -g   
pm2 start index

# Other pm2 commands
pm2 show app
pm2 status
pm2 restart app
pm2 stop app
pm2 logs (Show log stream)
pm2 flush (Clear logs)

# To make sure app starts when reboot
pm2 startup ubuntu

sudo ufw enable
sudo ufw status
sudo ufw allow ssh (Port 22)
sudo ufw allow http (Port 80)
sudo ufw allow https (Port 443)

sudo apt install nginx

sudo nano /etc/nginx/sites-available/default

  server {
        listen 80 default_server;
        listen [::]:80 default_server;

        root /var/www/html;
        index index.html index.htm index.nginx-debian.html;

        server_name _;

        location / {
            proxy_pass http://localhost:3000;  #whatever port your app runs on
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
        }
    }

# Check NGINX config
sudo nginx -t

# Restart NGINX
sudo nginx -s reload

sudo apt update
sudo apt install snapd
sudo snap install --classic certbot
sudo ln -s /snap/bin/certbot /usr/bin/certbot
sudo certbot --nginx -d yourdomain.com -d www.yourdomain.com

# Only valid for 90 days, test the renewal process with
sudo certbot renew --dry-run

# Restart NGINX and PM2
sudo systemctl restart nginx
PM2 restart all

Stop: sudo systemctl stop nginx
Start: sudo systemctl start nginx
Restart: sudo systemctl restart nginx
Reload: sudo systemctl reload nginx
Disable: sudo systemctl disable nginx
Enable: sudo systemctl enable nginx
Check status: sudo systemctl status nginx

pm2 start: - Starts a new process.
pm2 list: - Lists all running processes.
pm2 stop: - Stops a running process.
pm2 restart: - Restarts a running process.
pm2 reload: - Reloads a running process without downtime.
pm2 delete: - Deletes a process from the PM2 process list.
pm2 logs: - Displays the logs for a running process.
pm2 monit: - Opens a real-time monitoring dashboard for all running processes.
pm2 save: - Saves the current process list to a file.
pm2 startup: - Configures PM2 to run as a daemon service.

Example : pm2 start <processid> OR pm2 start all

ls - The most frequently used command in Linux to list directories
pwd - Print working directory command in Linux
cd - Linux command to navigate through directories
mkdir - Command used to create directories in Linux
mv - Move or rename files in Linux
cp - Similar usage as mv but for copying files in Linux
rm - Delete files or directories
touch - Create blank/empty files
sudo - super user do  (It is equal to the option "run as administrator" in Windows.)
clear - To clear the terminal
wget - Download files from the internet
sudo apt-get update - Update the package lists for available software packages from the configured repositories.
sudo apt-get upgrade - Install the latest versions of the packages currently installed on the user’s system from the sources enumerated in /etc/apt/sources.list.