diff --git a/packages/hydrooj/bin/hydrooj.js b/packages/hydrooj/bin/hydrooj.js
index eb417e91..8269b934 100755
--- a/packages/hydrooj/bin/hydrooj.js
+++ b/packages/hydrooj/bin/hydrooj.js
@@ -5,6 +5,7 @@ const path = require('path');
 const cluster = require('cluster');
 const fs = require('fs-extra');
 const { argv } = require('yargs');
+const child = require('child_process');
 
 if (!cluster.isMaster) {
     const hydro = require('../dist/loader');
@@ -14,11 +15,25 @@ if (!cluster.isMaster) {
         process.exit(1);
     });
 } else {
-    fs.ensureDirSync(path.resolve(os.homedir(), '.hydro'));
-    const addonPath = path.resolve(os.homedir(), '.hydro', 'addon.json');
+    const hydroPath = path.resolve(os.homedir(), '.hydro');
+    fs.ensureDirSync(hydroPath);
+    const addonPath = path.resolve(hydroPath, 'addon.json');
     if (!fs.existsSync(addonPath)) fs.writeFileSync(addonPath, '[]');
     let addons = JSON.parse(fs.readFileSync(addonPath).toString());
 
+    if (argv._[0] === 'db') {
+        function buildUrl(opts) {
+            let mongourl = `${opts.protocol}://`;
+            if (opts.username) mongourl += `${opts.username}:${opts.password}@`;
+            mongourl += `${opts.host}:${opts.port}/${opts.name}`;
+            if (opts.url) mongourl = opts.url;
+            return mongourl;
+        }
+        const dbConfig = fs.readFileSync(path.resolve(hydroPath, 'config.json'), 'utf-8');
+        const url = buildUrl(JSON.parse(dbConfig));
+        return child.spawn('mongo', [url], { stdio: 'inherit' });
+    }
+
     try {
         const ui = argv.ui || '@hydrooj/ui-default';
         require.resolve(ui);
diff --git a/packages/hydrooj/locales/en.yaml b/packages/hydrooj/locales/en.yaml
index 45ec8636..ca277a2b 100644
--- a/packages/hydrooj/locales/en.yaml
+++ b/packages/hydrooj/locales/en.yaml
@@ -36,6 +36,7 @@ homework_main: Homework
 homework_scoreboard: Scoreboard
 judge_playground: Judge Playground
 main: Home
+manage_dashboard: Control Panel
 manage_module: Module Management
 manage_script: Scripts
 manage_setting: System Settings
@@ -58,6 +59,7 @@ perm_training: Trainings
 problem_create: Problem Create
 problem_detail: Problem Detail
 problem_edit: Problem Edit
+problem_files: Problem Files
 problem_import: Import Problem
 problem_main: Problem Set
 problem_solution: Problem Solution
@@ -87,6 +89,7 @@ setting_smtp: SMTP Settings
 setting_usage: Usage Preference
 timeago_locale: en_US
 training_create: Training Create
+training_detail: Training Detail
 training_edit: Training Edit
 training_main: Training
 user_detail: User Detail
diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 3d77d2d7..7c99d784 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.20.32",
+    "version": "2.20.33",
     "bin": "bin/hydrooj.js",
     "main": "dist/loader.js",
     "typings": "dist/loader.d.ts",
diff --git a/packages/hydrooj/src/service/db.ts b/packages/hydrooj/src/service/db.ts
index 424e12e1..460d064a 100644
--- a/packages/hydrooj/src/service/db.ts
+++ b/packages/hydrooj/src/service/db.ts
@@ -3,6 +3,7 @@ import * as bus from './bus';
 import { Collections } from '../interface';
 
 interface MongoConfig {
+    protocol?: string,
     username?: string,
     password?: string,
     host?: string,
@@ -19,12 +20,17 @@ class MongoService {
     public db2: Db;
     private opts: MongoConfig;
 
-    async start(opts: MongoConfig) {
-        this.opts = opts;
-        let mongourl = 'mongodb://';
+    static buildUrl(opts: MongoConfig) {
+        let mongourl = `${opts.protocol}://`;
         if (opts.username) mongourl += `${opts.username}:${opts.password}@`;
         mongourl += `${opts.host}:${opts.port}/${opts.name}`;
         if (opts.url) mongourl = opts.url;
+        return mongourl;
+    }
+
+    async start(opts: MongoConfig) {
+        this.opts = opts;
+        const mongourl = MongoService.buildUrl(opts);
         this.client = await MongoClient.connect(mongourl, { useNewUrlParser: true, useUnifiedTopology: true });
         this.db = this.client.db(opts.name);
         this.client2 = await MongoClient.connect(mongourl, { useNewUrlParser: true, useUnifiedTopology: true });