Networking
- TCP/IP, Subnetting, VLANs
- Routing & Switching
- OSPF, ACLs, NAT
- Network Troubleshooting
Operating Systems
- Linux (Ubuntu Server)
- Windows Server 2019 / 2022
- Windows 10 / 11
System Administration
- User & group management
- SSH configuration & hardening
- DNS, Web, and File Services
Tools & Technologies
- Git & GitHub
- DigitalOcean
- Termius
- PostgreSQL & SQL