linux 文件打不开网页

ping 8.8.8.8  # 测试与Google DNS服务器的连接
ifconfig -a    # 查看网络接口配置

nameserver 8.8.8.8
nameserver 8.8.4.4

sudo ufw status  # 查看Ubuntu系统的防火墙状态
sudo systemctl status firewalld  # 查看CentOS系统的防火墙状态

sudo systemctl restart networking  # 对于基于Debian的系统
sudo systemctl restart NetworkManager  # 对于基于Red Hat的系统

#!/bin/bash

echo "Checking network connection..."
ping -c 3 8.8.8.8 > /dev/null 2>&1
if [ $? -ne 0 ]; then
    echo "Network connection failed. Attempting to restart networking service..."
    sudo systemctl restart networking
fi

echo "Checking DNS configuration..."
cat /etc/resolv.conf | grep "nameserver"
if [ $? -ne 0 ]; then
    echo "Updating DNS servers..."
    echo "nameserver 8.8.8.8" | sudo tee -a /etc/resolv.conf
    echo "nameserver 8.8.4.4" | sudo tee -a /etc/resolv.conf
fi

echo "Checking firewall status..."
sudo ufw status