• Introduction
• Basic Usage of netstat
• Common Use Cases
• Advanced netstat Techniques
• Conclusion

Introduction

The netstat command is a powerful tool for monitoring network connections and activity in Linux. It provides detailed information about the network status and can be used for troubleshooting and security purposes.

Basic Usage of netstat

Syntax

The basic syntax of netstat is:

netstat [options]

Example

To display all active network connections:

netstat -a

Common Use Cases

• Listing Listening Ports: Use netstat -l to see which ports are listening for incoming connections.
• Identifying Process IDs: Add the -p option to see the process ID (PID) associated with each network connection.

Advanced netstat Techniques

Filtering Output

You can use various options to filter the netstat output, such as -t for TCP connections or -u for UDP connections.

netstat -antp | grep 80

Conclusion

Understanding the netstat command is crucial for monitoring and troubleshooting network-related issues in a Linux environment.