jyhosts/synchosts.sh

#!/bin/bash

# 获取当前时间
current_time=$(date "+%Y%m%d%H%M")

# 备份/etc/hosts文件
backup_file="/opt/host/hosts.$current_time"
cp /etc/hosts "$backup_file"


# 下载远程文件
curl -s -o hosts_product.txt http://172.20.45.131:11082/BaseService/jyhosts/raw/master/hosts_product.txt 

# 检查文件是否成功下载
if [ $? -ne 0 ]; then
  echo "无法下载远程文件"
  exit 1
fi

# 对比文件内容并替换

add_count=0
while IFS= read -r line || [[ -n "$line" ]]; do
  domain=$(echo "$line" | awk '{print $2}')
  ip=$(echo "$line" | awk '{print $1}')
  
  # 检查是否存在域名
  grep -q "$domain" /etc/hosts
  
  if [ $? -eq 0 ]; then
    # 域名存在，检查IP是否一致
    existing_ip=$(grep "$domain" /etc/hosts | awk '{print $1}')
    if [ "$existing_ip" != "$ip" ]; then
      # IP不一致，进行替换
      add_count=$((add_count+1))
      sed -i "s/^$existing_ip[[:space:]]*$domain/$ip $domain/" /etc/hosts
    fi
  else
    # 域名不存在，新增
    add_count=$((add_count+1))
    echo "$ip $domain" >> /etc/hosts
  fi

done < hosts_product.txt

echo "replace success: ${add_count}"