🚀 multix20 – Sysadmin & Full Stack Developer Portfolio

👤 About Me Juan Pablo Monsalve Suazo 📚 Primary School Teacher | 💻 Full Stack Developer (JS) | 🐧 Self-taught Linux SysAdmin

Passionate about blending education, development, and open-source infrastructure. Currently focused on building solid foundations in:

✔️ Ubuntu Server ✔️ Secure SSH configurations ✔️ Linux hardening for practical environments ✔️ Preparation for Red Hat certification

💡 I believe technology empowers education, automation, and freedom.

🌟 Practical Server Configuration Log My most recent Ubuntu Server setup (Virtual Machine, 2025):

✅ Installed Ubuntu Server 24.04 LTS ✅ Configured static IP for stability:

text Copiar código 192.168.0.11/24 via Netplan ✅ Hardened SSH Access:

Custom SSH port 2222

Disabled root login

Disabled password authentication

Enabled only SSH key-based access

Firewall (UFW) configured to allow only port 2222

✅ Created backup admin user with sudo privileges for safe recovery:

bash Copiar código sudo adduser respaldo sudo usermod -aG sudo respaldo ✅ Verified secure, key-only SSH login for all admin users.

✅ Kept both IPv4 and IPv6 connectivity operational.

📁 Featured Projects Project Description ubuntu-server-setup 🧰 Quick-start provisioning script for secure Ubuntu servers. ansible-educational-lab 📘 Ansible playbooks for educational or lab deployments. linux-hardening-basics 🛡️ Simple scripts and guidelines for securing Linux systems.

🛠️ Technical Stack 🧑‍💻 Development HTML • CSS • JavaScript • React

Node.js • Express.js • MongoDB • PostgreSQL

🐧 Linux Administration Ubuntu Server 24.04 (production ready)

Static networking with Netplan

SSH security: port change, key-only, no root

User management and permissions

CLI, services, and remote management

🤖 Automation & Tools Ansible (server automation)

Bash scripting

Git & GitHub workflows

PXE Boot & Syslinux (initial exploration)

🎓 Education & Certifications 🎓 Primary Education Degree

🖥️ Full Stack JavaScript Bootcamp (Desafío Latam)

🐧 Self-taught Linux Administration

🔜 Preparing for Red Hat Certified System Administrator (RHCSA)

📬 Contact Platform Link 🔗 GitHub github.com/multix20 💼 LinkedIn linkedin.com/in/your-profile (update this link) ✉️ Email [email protected]

📄 License This project is licensed under the MIT License. See the LICENSE file for details.

"Configuring servers is like teaching—establish structure, security, and allow growth." 🌱💻

✅ Próximos Pasos Documentados Automatizar configuraciones con Ansible

Configurar snapshots o backups de la máquina virtual

Aprender NGINX/Apache deployment

Continuar preparación RHCSA