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SimeonOnSecurity’s Guides

(Modified: 2026-03-10) — Written by — 4 min read
Learn how to improve website security and user trust by preloading HSTS settings on Chrome and Firefox. Follow our step-by-step guide for seamless implementation.
         

(Modified: 2026-03-10) — Written by — 5 min read
Become proficient in Git with this comprehensive guide covering everything from installation and configuration to branching, merging, and collaboration.
   

(Modified: 2026-03-10) — Written by — 7 min read
Discover the best methods for handling offline Linux updates on Ubuntu/Debian and CentOS/RHEL systems, using local repositories or caches.
         

(Modified: 2026-03-10) — Written by — 5 min read
Learn how to automate Linux patching and updates using Ansible, covering various distributions and setup instructions.
         

(Modified: 2026-03-10) — Written by — 4 min read
Learn how to update the firmware of Ubiquiti Unifi UDM Pro and UDM SE offline through command line SSH for optimal performance and security.
         

(Modified: 2026-03-10) — Written by — 4 min read
Streamline the process of updating Windows systems by automating with Ansible - step-by-step instructions and best practices included.
         

(Modified: 2026-03-10) — Written by — 4 min read
Learn how to set up Cloudflare Tunnels to streamline and protect your network traffic, enhancing performance and security.
         

(Modified: 2026-03-10) — Written by — 2 min read
Learn how to obtain file hashes on Windows using PowerShell, including SHA256, MD5, and SHA1, with step-by-step instructions and examples.
         

(Modified: 2026-03-10) — Written by — 3 min read
Learn how to obtain SHA256, MD5, and SHA1 hashes of files on Linux using built-in tools, ensuring data integrity and file authenticity.
     

(Modified: 2026-03-10) — Written by — 4 min read
Learn how to effectively set and handle time sources in Windows domains and standalone machines to ensure accurate time synchronization and avoid potential issues.

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