Basic Network Troubleshooting Commands in Linux

 Introduction

Networking issues are common, and Linux provides several built-in tools to diagnose and resolve them quickly.

Step 1: Check IP Address

ip addr show

➡️ Displays network interfaces and assigned IP addresses.

Step 2: Test Connectivity

ping google.com

➡️ Sends ICMP packets to check if the host is reachable.

Step 3: Trace Network Route

traceroute google.com

➡️ Shows the path packets take to reach a destination.

Step 4: Check DNS Resolution

nslookup google.com

or

dig google.com

➡️ Verifies DNS queries.

Step 5: View Active Connections

netstat -tulnp

➡️ Lists listening ports and active connections.

Conclusion

These commands form the foundation of network troubleshooting in Linux.