RAJUBK BLOGS

Category: DevOps

  • How can I schedule a nightly reboot?

    How can I schedule a nightly reboot?

    I’d use cron (should already be installed):

    sudo crontab -e

    The first time you might have to choose your preferred editor (like nano)

    Insert a line like

    0 4   *   *   *    /sbin/shutdown -r +5

    at the bottom. Explanation:

    m      h    dom        mon   dow       command
minute hour dayOfMonth Month dayOfWeek commandToRun

    would announce the reboot every day at 4:00am, then reboot 5 minutes later (at 4:05am).

    Ctrl+X, Y, Enter should get you out of crontab (if using nano)

    Note: you might have to run crontab -e as root, because shutdown needs root. crontab -e opens a file in /tmp instead of the actual crontab so that it can check your new crontab for errors. If there are no errors, then your actual crontab will be updated.

  • Nginx config for webserver

    Nginx config for webserver

    apt install nginx

cd /etc/nginx/sites-available
vim serivce

cd ../sites-enabled
ln -s ../sites-available/service

nginx -t

systemctl reload nginx
    server {
    server_name *.rajubk.com;
    client_max_body_size 1G;

    location / {
        proxy_pass http://localhost:9000;
        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;
    }

    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    ssl_certificate /etc/letsencrypt/live/domain.tld/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/domain.tld/privkey.pem;

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

    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers on;
    ssl_ciphers 'ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256';

    add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload" always;
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "no-referrer" always;
    add_header Permissions-Policy "geolocation=(), microphone=()" always;
    add_header X-XSS-Protection "1; mode=block" always;
}

# HTTP redirect block
server {
    listen 80;
    server_name *.rajubk.com;
    return 301 https://$host$request_uri;
}
    cd /etc/nginx/sites-enabled/
ln -s ../sites-available/minio
nginx -t
systemctl reload nginx
  • Install minio on ubuntu with docker compose

    Install minio on ubuntu with docker compose

    services:
  minio:
    image: minio/minio:RELEASE.2025-03-12T18-04-18Z-cpuv1
    container_name: minio-server
    environment:
      MINIO_ROOT_USER: minioadmin
      MINIO_ROOT_PASSWORD: minioadmin
    ports:
      - "9000:9000" # MinIO API and Console
      - "9001:9001" # MinIO Console (if using separate port for console)
    volumes:
      - minio_data:/data # Mount a named volume for persistent data
    command: server /data --console-address ":9001"
    restart: unless-stopped

volumes:
  minio_data: