How to use Python scripts for network monitoring on Linux servers

How to use Python scripts for network monitoring on Linux servers

Introduction:
With the development of technology and the popularity of the Internet, the Internet has become an important part of people’s lives and an integral part of the job. However, network stability and security have always been important concerns. In order to ensure the normal operation of the server, network monitoring is essential. This article will introduce how to use Python scripts for network monitoring on Linux servers and provide specific code examples.

1. Install the necessary libraries
Before we start, we need to ensure that python-related libraries are installed on the server, including psutil, socket and time.

For Debian and Ubuntu, you can use the following command to install:

sudo apt-get install python-psutil

For CentOS and Fedora, you can use the following command to install:

sudo yum install python2-psutil

2. Obtain the IP address of the server
Before network monitoring, we need to obtain the IP address of the server. This step can be achieved through the socket library. Here is an example:

import socket

def get_ip_address():
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    s.connect(("8.8.8.8", 80))
    ip_address = s.getsockname()[0]
    s.close()
    return ip_address

ip_address = get_ip_address()
print("服务器IP地址是：" + ip_address)

The above code creates a socket connection and connects to Google's DNS server, and then obtains the IP address of the server.

3. Check the server’s network connection
Next, we will use the psutil library to check the server’s network connection and obtain related information about the network connection. The following is an example:

import psutil

def check_network_connection():
    connections = psutil.net_connections()
    for connection in connections:
        if connection.status == 'ESTABLISHED':
            print("本地地址：%s，远程地址：%s，状态：%s" % (connection.laddr, connection.raddr, connection.status))

check_network_connection()

The above code uses the net_connections method of the psutil library to obtain the server's network connection list, and prints out the local address, remote address and connection status of all connections with a status of ESTABLISHED.

4. Monitoring the server’s network bandwidth
Monitoring the server’s network bandwidth is very important for evaluating network conditions and optimizing server performance. We can use the psutil library to monitor network bandwidth. The following is an example:

import psutil

def measure_network_bandwidth():
    network_interface = psutil.net_io_counters(pernic=True)
    for interface, data in network_interface.items():
        print("接口：%s，接收字节数：%s，发送字节数：%s" % (interface, data.bytes_recv, data.bytes_sent))

measure_network_bandwidth()

The above code uses the net_io_counters method of the psutil library to obtain the server's network interface data, and prints out the number of received bytes and the number of sent bytes for each interface.

Conclusion:
Network monitoring on a Linux server is a simple and effective way by using Python scripts. This article explains how to use Python scripts to obtain the server's IP address, check network connections, and monitor network bandwidth. These functions can help us evaluate network conditions, optimize server performance and detect potential problems in a timely manner.

Note: The code examples provided in this article are for reference only. Actual application may require appropriate modification and optimization based on the actual situation.

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