connect via ssh to vps
--------------

ssh -i /home/xx/Desktop/id_rsa user@IPADDRESS

----------


secure copy files to vps
------------------
make sure logout session
scp -i id_rsa index-secure.js user@IPADDY:/home/user/nodejs/index-secure.js
scp -i id_rsa index.html user@IPADDY:/home/user/nodejs/index.html


upgrade debian
---------------
sudo apt update
sudo apt upgrade
password

-----------------


change dir
-----------
cd nodejs
-----------

sudo apt install npm
npm install express --save

use 0.0.0.0 for public not 127.0.0.1



nano index.js
---------------
const https = require('https');
const http = require('http');
const fs = require('fs');
const hostname = '0.0.0.0';
const port = 443;
const domain ='domain'

const options = {
  key: fs.readFileSync('/home/user/_.domain_private_key.key'),
  cert: fs.readFileSync('/home/user/domain_ssl_certificate.cer')
};

https.createServer(options, function (req, res) {
  res.writeHead(200);
  res.end("hello world secured\n");
}).listen(port, hostname);

// Redirect from http port 80 to https

http.createServer(function (req, res) {
    res.writeHead(301, { "Location": "https://" + domain  });
    res.end();
}).listen(80);

---------------
run process in background, connect, and kill daemon node js server
------------------------------------------------------------------
[5] 135928
cd nodejs
sudo -v
nohup sudo node index.js &

see process running
------------------
ps -ef | grep node


logout of vps while keeping process running poor man daemon systemd service
----------------------------------------------------------------------------
exit


kill process
--------------
pid process id
ppid parent process id
kill 25938
pkill -STOP -P the_ppid



favicon convert
----------------
sudo apt install imagemagick
convert image.png  -background white \
          \( -clone 0 -resize 16x16 -extent 16x16 \) \
          \( -clone 0 -resize 32x32 -extent 32x32 \) \
          \( -clone 0 -resize 48x48 -extent 48x48 \) \
          \( -clone 0 -resize 64x64 -extent 64x64 \) \
          -delete 0 -alpha off -colors 256 favicon.ico
          
secure copy files to vps
------------------
make sure logout session
scp -i id_rsa index.js user@IPADDY:/home/user/nodejs/index.js
scp -i id_rsa index.html user@IPADDY:/home/user/nodejs/index.html


list file sizes human readable
-------------------------------
ls -l -h

see what service is running on port 80
---------------------------------------
sudo lsof -i:80

stop apache2 server
-------------------
sudo service apache2 stop
sudo apt-get remove apache2


local vs secure tls difference
------------------------------
secure 0.0.0.0 :43
local 127.0.0.1 : 8000
http vs https
reading certificate