SRJahirTech

Linux Tutorial — Part 11: Networking Basics

Linux servers live on networks. Understanding networking is mandatory.

1. Check IP Address

ip a

2. Ping Test

ping google.com

3. Check Open Ports

ss -tuln

4. netstat (older)

netstat -tulnp

5. Test Connectivity

curl https://example.com

6. DNS Resolution

nslookup google.com

7. Why Firewalls Matter

Open ports are attack surfaces.

Next, we combine everything into real server thinking.