90 lines
2.8 KiB
Bash
90 lines
2.8 KiB
Bash
#!/bin/bash
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# 颜色定义
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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BLUE='\033[0;34m'
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PURPLE='\033[0;35m'
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CYAN='\033[0;36m'
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NC='\033[0m'
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echo -e "${PURPLE}"
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echo "=================================================="
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echo " 🌈 智能DNS推荐系统"
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echo "=================================================="
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echo -e "${NC}"
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# 测试并推荐最佳DNS
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test_and_recommend() {
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declare -A dns_servers=(
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["119.29.29.29"]="腾讯DNS"
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["223.5.5.5"]="阿里DNS"
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["114.114.114.114"]="114DNS"
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["8.8.8.8"]="GoogleDNS"
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["1.1.1.1"]="Cloudflare"
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)
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declare -A results
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echo -e "${BLUE}🧪 测试各DNS性能...${NC}"
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for dns_ip in "${!dns_servers[@]}"; do
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total_time=0
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success_count=0
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test_domains=("baidu.com" "qq.com" "taobao.com")
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for domain in "${test_domains[@]}"; do
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start_time=$(date +%s%N)
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nslookup $domain $dns_ip >/dev/null 2>&1
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if [ $? -eq 0 ]; then
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end_time=$(date +%s%N)
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time_ms=$(( (end_time - start_time) / 1000000 ))
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total_time=$(( total_time + time_ms ))
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success_count=$(( success_count + 1 ))
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fi
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done
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if [ $success_count -gt 0 ]; then
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avg_time=$(( total_time / success_count ))
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results[$dns_ip]=$avg_time
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echo -e " ${dns_servers[$dns_ip]} ($dns_ip): ${avg_time}ms"
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else
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echo -e " ${RED}${dns_servers[$dns_ip]} ($dns_ip): 测试失败${NC}"
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fi
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done
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# 找出最快的DNS
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fastest_ip=""
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fastest_time=999999
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for ip in "${!results[@]}"; do
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if [ ${results[$ip]} -lt $fastest_time ]; then
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fastest_time=${results[$ip]}
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fastest_ip=$ip
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fi
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done
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echo -e "\n${GREEN}🎯 推荐使用: ${dns_servers[$fastest_ip]} ($fastest_ip)${NC}"
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echo -e "${GREEN}📊 平均解析时间: ${fastest_time}ms${NC}"
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# 设置推荐DNS
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echo -e "\n${BLUE}🔧 是否设置为推荐DNS？${NC}"
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read -p "输入 y 确认设置: " confirm
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if [ "$confirm" = "y" ]; then
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echo "nameserver $fastest_ip" > /etc/resolv.conf
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echo "nameserver 223.5.5.5" >> /etc/resolv.conf # 备用
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echo -e "${GREEN}✅ 已设置为 ${dns_servers[$fastest_ip]}${NC}"
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fi
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}
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test_and_recommend
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echo -e "\n${PURPLE}==================================================${NC}"
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echo -e "${CYAN}💡 重要提醒:${NC}"
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echo -e "${YELLOW}• DNS只影响域名解析速度${NC}"
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echo -e "${YELLOW}• 不影响已经建立连接的网络延迟${NC}"
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echo -e "${YELLOW}• 主要提升: 网页第一次打开速度${NC}"
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echo -e "${YELLOW}• 不影响: 视频缓冲、游戏延迟、下载速度${NC}"
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echo -e "${PURPLE}==================================================${NC}"
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