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#!/bin/bash
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# ============================================================
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# VPS 优化一键清理脚本
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# 还原 vps_optimize.sh 所做的所有修改
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# ============================================================
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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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CYAN='\033[0;36m'
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BOLD='\033[1m'
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NC='\033[0m'
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info() { echo -e "${CYAN}[INFO]${NC} $1"; }
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success() { echo -e "${GREEN}[OK]${NC} $1"; }
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warning() { echo -e "${YELLOW}[!]${NC} $1"; }
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error() { echo -e "${RED}[ERR]${NC} $1"; exit 1; }
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step() {
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echo -e "\n${BOLD}${BLUE}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
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echo -e "${BOLD}${YELLOW} $1${NC}"
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echo -e "${BOLD}${BLUE}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
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}
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RESULTS=()
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add_result() { RESULTS+=("$1"); }
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check_root() {
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[[ $EUID -eq 0 ]] || error "请使用 root 用户运行"
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}
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print_banner() {
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clear
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echo -e "${RED}"
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echo "╔══════════════════════════════════════════════════════╗"
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echo "║ VPS 优化一键清理脚本 ║"
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echo "║ 还原 vps_optimize.sh 所做的所有修改 ║"
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echo "╚══════════════════════════════════════════════════════╝"
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echo -e "${NC}"
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echo -e " ${YELLOW}${BOLD}警告: 此操作将还原所有优化配置，请确认后继续${NC}"
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echo ""
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read -rp " 确认清理? 输入 yes 继续，其他任意键退出: " confirm
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[[ "$confirm" == "yes" ]] || { echo "已取消"; exit 0; }
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}
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# ============================================================
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# 1. 清理 BBR 和内核参数
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# ============================================================
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clean_sysctl() {
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step "🔧 清理内核参数"
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local files=(
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"/etc/sysctl.d/99-bbr.conf"
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"/etc/sysctl.d/99-vps-optimize.conf"
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)
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for f in "${files[@]}"; do
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if [[ -f "$f" ]]; then
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rm -f "$f"
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success "已删除: $f"
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else
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info "不存在，跳过: $f"
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fi
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done
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# 重新加载 sysctl（恢复系统默认）
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sysctl --system >/dev/null 2>&1 || true
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local current
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current=$(sysctl -n net.ipv4.tcp_congestion_control 2>/dev/null || echo "unknown")
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info "当前拥塞算法: $current（已恢复系统默认）"
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add_result "✅ 内核参数: 已清理，重启后完全生效"
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}
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# ============================================================
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# 2. 清理文件描述符
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# ============================================================
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clean_nofile() {
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step "📁 清理文件描述符"
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local f="/etc/security/limits.d/99-nofile.conf"
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if [[ -f "$f" ]]; then
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rm -f "$f"
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success "已删除: $f"
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else
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info "不存在，跳过: $f"
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fi
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# 清理 systemd override
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for svc in sing-box nginx xray; do
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local d="/etc/systemd/system/${svc}.service.d/limits.conf"
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if [[ -f "$d" ]]; then
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rm -f "$d"
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# 如果目录空了也删掉
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rmdir "/etc/systemd/system/${svc}.service.d" 2>/dev/null || true
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success "已删除 systemd override: ${svc}"
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fi
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done
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systemctl daemon-reload 2>/dev/null || true
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add_result "✅ 文件描述符: 已恢复系统默认"
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}
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# ============================================================
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# 3. 清理 Nginx 相关
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# ============================================================
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clean_nginx() {
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step "🌐 清理 Nginx 配置"
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# 删除全局 snippet（如果残留）
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if [[ -f /etc/nginx/conf.d/99-optimize.conf ]]; then
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rm -f /etc/nginx/conf.d/99-optimize.conf
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success "已删除: /etc/nginx/conf.d/99-optimize.conf"
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else
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info "99-optimize.conf 不存在，跳过"
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fi
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# 还原 nginx 站点配置（从备份恢复）
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local nginx_conf
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nginx_conf=$(grep -rl "proxy_pass" /etc/nginx/sites-available/ 2>/dev/null | head -1 || true)
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if [[ -n "$nginx_conf" ]]; then
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# 找最新的备份
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local latest_bak
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latest_bak=$(ls -t "${nginx_conf}".bak.* 2>/dev/null | head -1 || true)
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if [[ -n "$latest_bak" ]]; then
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cp "$latest_bak" "$nginx_conf"
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success "已从备份还原: $latest_bak → $nginx_conf"
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# 删除所有备份
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rm -f "${nginx_conf}".bak.* 2>/dev/null || true
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success "已清理备份文件"
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else
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warning "未找到备份文件，nginx 站点配置未还原"
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warning "如需还原请手动处理: $nginx_conf"
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fi
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# 还原 nginx.conf worker 参数
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sed -i 's/worker_processes auto/worker_processes 1/' \
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/etc/nginx/nginx.conf 2>/dev/null || true
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sed -i '/events\s*{/,/}/{s/worker_connections 65535/worker_connections 768/}' \
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/etc/nginx/nginx.conf 2>/dev/null || true
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info "nginx.conf worker 参数已还原"
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else
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info "未找到反代配置，跳过"
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fi
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# 重启 nginx
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if command -v nginx &>/dev/null; then
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if nginx -t 2>/dev/null; then
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systemctl restart nginx 2>/dev/null || true
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success "nginx 已重启"
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else
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warning "nginx 配置测试失败，请手动检查"
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fi
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fi
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add_result "✅ Nginx: 已清理并重启"
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}
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# ============================================================
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# 4. 清理 CF 白名单 / ufw 规则
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# ============================================================
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clean_ufw() {
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step "🛡️ 清理 Cloudflare IP 白名单"
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if ! command -v ufw &>/dev/null; then
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info "ufw 未安装，跳过"
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add_result "⏭️ ufw: 未安装，跳过"
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return
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fi
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if ! ufw status 2>/dev/null | grep -q "Status: active"; then
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info "ufw 未启用，跳过"
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add_result "⏭️ ufw: 未启用，跳过"
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return
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fi
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# 删除所有 CF 相关规则
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info "删除 CF IP 白名单规则..."
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local deleted=0
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while true; do
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local num
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num=$(ufw status numbered 2>/dev/null | grep 'CF\|deny-direct' \
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| grep -oE '^\s*\[[0-9]+\]' | tr -d '[] ' | sort -rn | head -1 || true)
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[[ -z "$num" ]] && break
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ufw --force delete "$num" >/dev/null 2>&1 && (( deleted++ )) || break
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done
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success "已删除 ${deleted} 条 CF/deny-direct 规则"
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# 删除自动更新任务
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if [[ -f /etc/cron.d/update-cf-whitelist ]]; then
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rm -f /etc/cron.d/update-cf-whitelist
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success "已删除 cron 自动更新任务"
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fi
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if [[ -f /usr/local/bin/update-cf-whitelist.sh ]]; then
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rm -f /usr/local/bin/update-cf-whitelist.sh
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success "已删除更新脚本: /usr/local/bin/update-cf-whitelist.sh"
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fi
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ufw reload >/dev/null 2>&1 || true
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add_result "✅ CF 白名单: 已清理 ${deleted} 条规则"
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}
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# ============================================================
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# 5. 清理 nexttrace（可选）
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# ============================================================
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clean_nexttrace() {
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step "🔍 清理 nexttrace（可选）"
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read -rp " 是否同时删除 nexttrace？(y/N): " input
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input="${input:-n}"
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if [[ "$input" =~ ^[Yy]$ ]]; then
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if [[ -f /usr/local/bin/nexttrace ]]; then
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rm -f /usr/local/bin/nexttrace
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success "已删除 nexttrace"
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add_result "✅ nexttrace: 已删除"
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else
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info "nexttrace 不存在，跳过"
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add_result "⏭️ nexttrace: 不存在"
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fi
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else
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info "跳过 nexttrace"
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add_result "⏭️ nexttrace: 保留"
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fi
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}
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# ============================================================
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# 6. 最终报告
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# ============================================================
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print_report() {
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step "📋 清理完成报告"
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echo ""
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for r in "${RESULTS[@]}"; do echo -e " $r"; done
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echo ""
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echo -e " ${BOLD}当前服务状态:${NC}"
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for svc in nginx sing-box xray; do
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if systemctl list-unit-files 2>/dev/null | grep -q "^${svc}.service"; then
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if systemctl is-active --quiet "$svc" 2>/dev/null; then
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echo -e " ${GREEN}✔${NC} ${svc} 运行中"
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else
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echo -e " ${RED}✘${NC} ${svc} 未运行"
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fi
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fi
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done
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echo ""
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echo -e " ${BOLD}内核验证:${NC}"
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echo -e " 拥塞算法 : ${GREEN}$(sysctl -n net.ipv4.tcp_congestion_control 2>/dev/null)${NC}"
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echo -e " 队列算法 : ${GREEN}$(sysctl -n net.core.default_qdisc 2>/dev/null)${NC}"
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echo ""
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echo -e " ${BOLD}ufw 状态:${NC}"
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ufw status 2>/dev/null | grep -v "^$" | sed 's/^/ /' | head -10 || true
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echo ""
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echo -e " ${YELLOW}${BOLD}建议执行 reboot 使内核参数完全还原${NC}"
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echo ""
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}
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# ============================================================
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# 主流程
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# ============================================================
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main() {
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check_root
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print_banner
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clean_sysctl
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clean_nofile
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clean_nginx
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clean_ufw
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clean_nexttrace
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print_report
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}
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main
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