Linux Networking Commands

📅 2026-06-12 | 📂 Linux

Introduction

Linux provides powerful networking tools for configuration, troubleshooting, and monitoring. These commands are essential for any network engineer or system administrator working with Linux servers.

Network Configuration

# Show IP addresses
ip addr show

# Show routing table
ip route show

# DNS lookup
nslookup google.com
dig google.com

Connectivity Testing

# Ping a host
ping -c 4 google.com

# Trace route
traceroute google.com

# Test port connectivity
nc -zv localhost 80 8080

Network Statistics

# Show active connections
ss -tuln

# Show listening ports
ss -lntp

# Network statistics
netstat -s

File Transfer

# Download files
wget https://example.com/file.zip
curl -O https://example.com/file.zip

# Secure copy
scp file.txt user@host:/path/

# Sync directories
rsync -avz /local/ user@host:/remote/

Firewall Configuration

# UFW (Ubuntu)
sudo ufw allow 80/tcp
sudo ufw allow 443/tcp
sudo ufw enable
sudo ufw status

Summary

These networking commands help you configure interfaces, test connectivity, transfer files, and manage firewalls. Mastering them is critical for Linux server administration.

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