Category: bash

  • ssh zip + download locally

    ssh mero 'cd ~/instax-app && zip -r - . \
-i "*.go" "static/*" "views/*" \
-x "static/videos/*"' > "/Users/sumnima/Documents/mero - backup/instax-app-backup.zip"

  • instax zip

    zip -r backups/instax-app-$(date +%F-%H-%M).zip . \
-i "*.go" "static/*" "views/*" \
-x "static/videos/*"

  • go build && systemctl restart

    cd /home/mero/instax-app  &&  go build -o mero-app . && sudo systemctl restart mero

  • tail

    tail -n +1 *.js

    #bookmark for my lazy memory!!

  • ssh mero

    ssh mero

  • Lightning-Fast Video Server on a $8 Droplet (Go + Nginx + SQLite)

    ✍️ Intro (why this setup)

    Modern stacks are heavy.

    Most tutorials still push full LEMP stacks—Linux, Nginx, MySQL, PHP—even when your app doesn’t need them. On a small 1GB server, that approach wastes memory and kills performance before you even start.

    This setup takes a different direction:

    • No MySQL
    • No PHP
    • No unnecessary services

    Instead, it focuses on what actually matters for a video-first app:

    • fast startup time
    • low memory usage
    • smooth playback on mobile networks

    ⚡ The idea behind this setup

    The goal is simple:

    Make videos start instantly, even on a tiny server

    To achieve that, we combine:

    • Go → lightweight backend (low RAM, fast response)
    • SQLite → zero overhead database (no separate server)
    • Nginx → efficient static + video delivery
    • FFmpeg (FastStart) → videos playable before full download

    This avoids the biggest bottleneck:

    heavy background services eating your RAM

    🧠 Why not LEMP?

    A traditional LEMP stack:

    • MySQL alone can use 300–400MB RAM
    • PHP-FPM adds more overhead
    • Leaves very little room for actual work (like video processing)

    On a 1GB droplet, that’s a problem.

    With this setup:

    • total base usage stays low
    • more memory is available for real tasks (video + users)

    🎯 What this is good for

    • MVPs and experiments
    • video-based apps (like short clips / reels)
    • solo developer projects
    • learning how to build efficient systems

    ⚠️ What this is NOT

    This is not:

    • a “scale to millions instantly” setup
    • a fully hardened production environment

    It’s a fast, minimal foundation you can build on.

    🔥 Final thought

    Instead of starting big and optimizing later, this approach flips it:

    Start small, fast, and efficient—then scale only when needed

    #!/bin/bash

set -e

echo "Starting lightweight video server setup..."

# -----------------------------
# 1. EMERGENCY RAM (2GB SWAP)
# -----------------------------
# Helps prevent crashes on 1GB droplets during FFmpeg spikes
fallocate -l 2G /swapfile || true
chmod 600 /swapfile
mkswap /swapfile || true
swapon /swapfile || true
grep -q swapfile /etc/fstab || echo '/swapfile none swap sw 0 0' >> /etc/fstab

# Reduce swap aggressiveness
sysctl vm.swappiness=10

# -----------------------------
# 2. KERNEL TUNING (TCP BBR)
# -----------------------------
# Improves network performance (especially mobile users)
grep -q "fq" /etc/sysctl.conf || echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf
grep -q "bbr" /etc/sysctl.conf || echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf
sysctl -p

# -----------------------------
# 3. INSTALL CORE PACKAGES
# -----------------------------
apt update
apt install -y curl gnupg2 ca-certificates lsb-release ubuntu-keyring ffmpeg snapd

# -----------------------------
# 4. INSTALL NGINX (WITH BROTLI)
# -----------------------------
mkdir -p /etc/apt/keyrings

curl -fsSL https://extras.getpagespeed.com/deb-archive-keyring.gpg \
  | tee /etc/apt/keyrings/getpagespeed.gpg >/dev/null

echo "deb [signed-by=/etc/apt/keyrings/getpagespeed.gpg] https://extras.getpagespeed.com/ubuntu $(lsb_release -sc) main" \
  | tee /etc/apt/sources.list.d/getpagespeed-extras.list

apt update
apt install -y nginx nginx-module-brotli

# -----------------------------
# 5. INSTALL GO
# -----------------------------
snap install go --classic

# -----------------------------
# 6. PREPARE APP DIRECTORIES
# -----------------------------
mkdir -p /var/www/app/videos
mkdir -p /var/www/app/db
chown -R www-data:www-data /var/www/app

# -----------------------------
# 7. BACKUP DEFAULT NGINX CONFIG
# -----------------------------
cp /etc/nginx/nginx.conf /etc/nginx/nginx.conf.backup || true

# -----------------------------
# 8. OPTIMIZED NGINX CONFIG
# -----------------------------
cat <<'EOF' > /etc/nginx/nginx.conf
user www-data;
worker_processes auto;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;

# Load Brotli modules (comment out if Nginx fails to start)
load_module modules/ngx_http_brotli_filter_module.so;
load_module modules/ngx_http_brotli_static_module.so;

events {
    worker_connections 2048;
    multi_accept on;
}

http {
    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    # Core performance
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;

    # Brotli (for text assets only)
    brotli on;
    brotli_comp_level 4;
    brotli_static on;
    brotli_types text/plain text/css application/javascript application/json image/svg+xml;

    # Logging (minimal)
    access_log off;
    error_log /var/log/nginx/error.log crit;

    server {
        listen 80;
        server_name _;

        root /var/www/app;
        index index.html;

        # -------------------------
        # VIDEO SERVING (FAST)
        # -------------------------
        location /videos/ {
            alias /var/www/app/videos/;

            sendfile on;
            tcp_nopush on;
            tcp_nodelay on;

            add_header Cache-Control "public, max-age=31536000, immutable";
            add_header Access-Control-Allow-Origin *;
            add_header Accept-Ranges bytes;
        }

        # -------------------------
        # GO BACKEND API
        # -------------------------
        location /api/ {
            proxy_pass http://127.0.0.1:8080;
            proxy_http_version 1.1;

            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;

            proxy_buffering off;
        }
    }
}
EOF

# -----------------------------
# 9. RESTART NGINX
# -----------------------------
nginx -t && systemctl restart nginx

echo "Setup complete. Your lightweight video server is ready."