🌐 Linux Networking

📖 What is Linux Networking?

Linux Networking என்பது Linux Operating System-ல் Network Interfaces, IP Addressing, Routing, DNS மற்றும் Network Services-ஐ நிர்வகிக்கும் செயல்முறை ஆகும்.

🌍 Check IP Address

ip addr show

ip a

hostname -I

⚙ Network Interface Management

ip link show

ip link set eth0 up

ip link set eth0 down

📡 Configure IP Address

ip addr add 192.168.1.10/24 dev eth0

ip addr del 192.168.1.10/24 dev eth0

🛣 Routing Commands

ip route show

route -n

ip route add default via 192.168.1.1

🌐 DNS Configuration

cat /etc/resolv.conf

nameserver 8.8.8.8

nameserver 1.1.1.1

📶 Connectivity Testing

ping 8.8.8.8

ping google.com

traceroute google.com

🔍 DNS Testing

nslookup google.com

dig google.com

host google.com

📊 Network Statistics

netstat -an

ss -tulnp

ifconfig

🔐 SSH Remote Access

ssh user@192.168.1.10

systemctl status ssh

✔ Remote Server Management

✔ Secure Administration

🔥 Linux Firewall

ufw status

ufw enable

ufw allow 22

✔ Secure Network Access

🌍 Real World Usage

✔ Telecom Networks

✔ ISP Infrastructure

✔ DNS Servers

✔ DHCP Servers

✔ Cloud Platforms

✔ Data Centers

✔ RailTel Networks

✔ NOC Operations

🎤 Interview Questions

How to check IP Address in Linux?

What is ip addr command?

How to check routing table?

What is DNS configuration file?

Difference between netstat and ss?

What is SSH?

How to test connectivity?

How to configure default gateway?

What is traceroute?

How to secure Linux Networking?

📝 Summary

Linux Networking என்பது Network Engineers, Telecom Engineers மற்றும் Linux Administrators-க்கு மிகவும் முக்கியமான Skill ஆகும்.

Linux Servers, Cloud Platforms மற்றும் Network Services அனைத்தும் Networking Knowledge-ஐ அடிப்படையாகக் கொண்டுள்ளன.

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