Compile and Install Linux Kernel on Ubuntu 20.04

sudo apt-get install git fakeroot build-essential ncurses-dev xz-utils libssl-dev bc flex libelf-dev bison


tar xvf linux-5.7.10.tar.xz

cd linux-5.7.10

cp /boot/config-$(uname -r) .config

make menuconfig


sudo make modules_install

sudo make install

sudo update-initramfs -c -k 5.7.10

sudo update-grub

*) used for trying new kernel api from linux (io_uring).

Nginx HTTP Load Balancer

$ sudo vim /etc/nginx/nginx.conf

http {

  # round robin
  upstream rumahpemuridan {
      server weight=3;
      server max_conns=2;
      queue 100 timeout=70;

  server {
    listen 80;
    location / {
      proxy_pass http://rumahpemuridan;

Install Nginx and Let's Encrypt on Ubuntu 20.04


  • You have domain name pointing to your server public IP.

Installation process

  • sudo apt update

  • sudo apt install nginx

  • sudo systemctl enable nginx

  • sudo apt install certbot

  • sudo openssl dhparam -out /etc/ssl/certs/dhparam.pem 2048

  • sudo mkdir -p /var/lib/letsencrypt/.well-known

  • sudo chgrp www-data /var/lib/letsencrypt

  • sudo chmod g+s /var/lib/letsencrypt

  • sudo vim /etc/nginx/snippets/letsencrypt.conf

location ^~ /.well-known/acme-challenge/ {
  allow all;
  root /var/lib/letsencrypt/;
  default_type "text/plain";
  try_files $uri =404;
  • sudo vim /etc/nginx/snippets/ssl.conf
ssl_dhparam /etc/ssl/certs/dhparam.pem;

ssl_session_timeout 1d;
ssl_session_cache shared:SSL:50m;
ssl_session_tickets off;

ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;

ssl_stapling on;
ssl_stapling_verify on;
resolver valid=300s;
resolver_timeout 30s;

add_header Strict-Transport-Security "max-age=15768000; includeSubdomains; preload";
add_header X-Frame-Options SAMEORIGIN;
add_header X-Content-Type-Options nosniff;
  • sudo vim /etc/nginx/sites-available/
server {
  listen 80;
  listen [::]:80;
  root /var/www/html
  include snippets/letsencrypt.conf;
  • sudo ln -s /etc/nginx/sites-available/ /etc/nginx/sites-enabled/

  • sudo systemctl restart nginx

  • sudo certbot certonly --agree-tos --email [email protected] --webroot -w /var/lib/letsencrypt/ -d

  • sudo vim /etc/nginx/sites-available/

server {
    listen 80;
    listen [::]:80;
    root /var/www/html
    include snippets/letsencrypt.conf;
    return 301$request_uri; # redirect http to https

server {
    listen 443 ssl http2;

    ssl_certificate /etc/letsencrypt/live/;
    ssl_certificate_key /etc/letsencrypt/live/;
    ssl_trusted_certificate /etc/letsencrypt/live/;
    include snippets/ssl.conf;
    include snippets/letsencrypt.conf;

  • sudo vim /etc/cron.d/certbot
    0 */12 * * * root test -x /usr/bin/certbot -a \! -d /run/systemd/system && perl -e 'sleep int(rand(3600))' && certbot -q renew --renew-hook "systemctl reload nginx"
  • sudo certbot renew --dry-run

Install Mongo DB CE on Ubuntu 20.04

Import the public key used by the package management system

  • sudo apt-get update && sudo apt-get install gnupg

  • wget -qO - | sudo apt-key add -

Add Mongo DB repository

  • echo "deb [ arch=amd64,arm64 ] bionic/mongodb-org/4.2 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.2.list

Install Mongo DB

  • sudo apt-get update && sudo apt-get install -y mongodb-org

Start Mondo DB on Boot

  • sudo systemctl enable mongod.service