Sandeep Palod

To check the NetworkIn logs on an Amazon EC2 instance running Ubuntu, you can follow these steps:

1. Log in to your instance using SSH or connect to it through the EC2 Console.
2. Once you are logged in, you can use the dmesg command to display the kernel ring buffer messages. This will show you the system messages including the network activity.
3. You can also use the sar command to display the system activity in real-time including the network activity. If the sar command is not installed on your instance, you can install it using the following command:udo apt-get install sysstat
4. To view the NetworkIn logs, you can use the sar -n DEV command which will display the network activity statistics for all network interfaces on the system.Copy codesar -n DEV This will show you the NetworkIn and NetworkOut statistics for each network interface on the system.
5. If you want to view the NetworkIn logs for a specific network interface, you can use the following command:csharpCopy codesar -n DEV -I <interface-name> Replace <interface-name> with the name of the network interface that you want to view the logs for.

That’s it! You can now check the NetworkIn logs on your Amazon EC2 instance running Ubuntu using the above steps.

High NetworkIn logs on an Ubuntu Amazon EC2 instance can be caused by various factors, including network congestion, a misconfigured application or service, or a compromised instance. Here are a few steps you can take to try to fix the issue:

1. Check for network congestion: Run the iftop command to monitor network traffic in real-time and identify if there is high network traffic or a bottleneck in the network. You may need to optimize your network or upgrade your instance to a larger size if it is unable to handle the network load.
2. Check for misconfigured applications or services: Run the netstat command to identify which processes are listening on network ports and check if there are any misconfigured applications or services that are causing high NetworkIn logs. You may need to adjust the configurations of these services or optimize their usage.
3. Check for compromised instances: Run the ss -tuna command to check for any suspicious network connections or activities that may indicate that the instance has been compromised. If you suspect that your instance has been compromised, you should immediately isolate the instance from the network and take remedial actions such as running malware scans and updating security settings.
4. Optimize your instance: If your instance is running low on resources, you may need to optimize it by upgrading to a larger instance size, adding more CPU, RAM, or storage resources. You can also consider optimizing the operating system, the applications or services running on the instance, or enabling network-level optimizations such as TCP tuning.

By following these steps, you should be able to identify the root cause of high NetworkIn logs on your Ubuntu Amazon EC2 instance and take the necessary steps to fix the issue.