Hi, I’m Didi — The SysAdmin Behind the Terminal
I build, secure, and optimize Linux servers.
Most of my time is spent troubleshooting systems, automating repetitive tasks, and digging into logs to find what others overlook.
This site is my technical notebook — a collection of real-world solutions, performance tweaks, and configurations that I’ve tested in production environments.
If it’s here, it works.
What You’ll Find Here
Didi The SysAdmin is a growing hub for system administrators, self-hosters, and DevOps learners who want clear, practical answers.
You’ll find guides and notes about:
- Linux server setup and optimization
- Postfix, Dovecot, Rspamd & Amavis email stack
- Nginx reverse proxies and caching
- Security hardening & firewall management
- DevOps tools, monitoring, and automation
No clickbait. No fluff. Just technical clarity.
Why I Started This Site
For years I kept my configs and notes scattered across text files, sticky notes, and terminal histories.
Eventually, I realized those same notes could help others facing the same problems.
So this site became my documentation vault — but shared publicly.
It’s part logbook, part lab — a reflection of what I learn and fix every day.
Tools I Use
- OS: CentOS, Debian, Ubuntu, FreeBSD, Windows
- Editor: Vim, Nano, Notepad++
- Web Server: Nginx, Apache, IIS
- Database: MariaDB / MySQL
- Mail Stack: Postfix + Dovecot + Rspamd / Amavis + ClamAV
- Automation: Bash, Ansible, PowerShell and cron
- Programming Language: PHP, Python
Get In Touch
Have a question, collaboration idea, or something to share?
You can reach me via:
Contact Form
Let’s make systems run smoother — one command at a time.