diff --git a/README.md b/README.md
index f576d1eb..fed739a8 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,6 @@ Hydro是一个高效的信息学在线测评系统。特点：易于部署，轻
 curl -sSL https://cdn.jsdelivr.net/gh/hydro-dev/Hydro@master/install/ubuntu-1604.sh | bash # ubuntu 16.04
 curl -sSL https://cdn.jsdelivr.net/gh/hydro-dev/Hydro@master/install/ubuntu-1804.sh | bash # ubuntu 18.04
 curl -sSL https://cdn.jsdelivr.net/gh/hydro-dev/Hydro@master/install/ubuntu-2004.sh | bash # ubuntu 20.04
-# 下方脚本未测试有效性，请尽量避免使用
 curl -sSL https://cdn.jsdelivr.net/gh/hydro-dev/Hydro@master/install/centos-7.sh | bash # centos 7
 ```
 
diff --git a/install/centos-7.sh b/install/centos-7.sh
index bfffea54..3dd24d12 100644
--- a/install/centos-7.sh
+++ b/install/centos-7.sh
@@ -6,6 +6,7 @@ MINIO_ACCESS_KEY=$(cat /dev/urandom | head -n 10 | md5sum | head -c 20)
 MINIO_SECRET_KEY=$(cat /dev/urandom | head -n 10 | md5sum | head -c 20)
 
 # Basic
+yum install wget
 mkdir -p /etc/yum.repos.d
 echo "[mongodb-org-4.4]
 name=MongoDB Repository
@@ -17,7 +18,8 @@ echo "yum install -y mongodb-org"
 yum install -y mongodb-org
 mkdir -p /var/lib/mongo
 mkdir -p /var/log/mongodb
-chown -R mongod:mongod /var/lib/mongo /var/log/mongodb
+mkdir -p /data/db
+chown -R mongod:mongod /var/lib/mongo /var/log/mongodb /data/db
 
 # Install NodeJS
 echo "Installing NodeJS"
@@ -50,10 +52,6 @@ pm2 del mongod >/dev/null
 echo 'pm2 start "mongod --auth"'
 pm2 start "mongod --auth"
 
-# Install Compiler
-echo 'Installing g++'
-apt-get install -y g++ >/dev/null
-
 # Install MinIO
 echo 'Installing MinIO'
 wget https://dl.min.io/server/minio/release/linux-amd64/minio
@@ -65,9 +63,9 @@ pm2 start "./minio server /data/file" --name minio
 # TODO: install basic addons?
 echo "Installing Hydro"
 yarn global add hydrooj @hydrooj/ui-default @hydrooj/hydrojudge
-wget https://github.com/criyle/go-judge/releases/download/v0.7.1/executorserver-amd64 -O /usr/bin/sandbox
-chmod +x /usr/bin/sandbox
-pm2 start "/usr/bin/sandbox"
+wget https://github.com/criyle/go-judge/releases/download/v0.9.4/executorserver-amd64 -O /usr/bin/sandbox_
+chmod +x /usr/bin/sandbox_
+pm2 start "/usr/bin/sandbox_"
 mkdir ~/.hydro
 echo "{\"host\":\"127.0.0.1\",\"port\":\"27017\",\"name\":\"hydro\",\"username\":\"hydro\",\"password\":\"$db_password\"}" >~/.hydro/config.json
 echo '["@hydrooj/ui-default","@hydrooj/hydrojudge"]' >~/.hydro/addon.json
@@ -77,3 +75,5 @@ pm2 start hydrooj
 echo "Done"
 echo "Database username: hydro"
 echo "Database password: $db_password"
+echo "MINIO_ACCESS_KEY=$MINIO_ACCESS_KEY
+MINIO_SECRET_KEY=$MINIO_SECRET_KEY" >~/.hydro/env
diff --git a/install/ubuntu-1604.sh b/install/ubuntu-1604.sh
index c1192679..29fa909c 100644
--- a/install/ubuntu-1604.sh
+++ b/install/ubuntu-1604.sh
@@ -75,4 +75,6 @@ pm2 save
 # Done
 echo "Done"
 echo "Database username: hydro"
-echo "Database password: $db_password"
\ No newline at end of file
+echo "Database password: $db_password"
+echo "MINIO_ACCESS_KEY=$MINIO_ACCESS_KEY
+MINIO_SECRET_KEY=$MINIO_SECRET_KEY" >~/.hydro/env
diff --git a/install/ubuntu-1804.sh b/install/ubuntu-1804.sh
index 86fe4ee2..339bc870 100644
--- a/install/ubuntu-1804.sh
+++ b/install/ubuntu-1804.sh
@@ -75,4 +75,6 @@ pm2 save
 # Done
 echo "Done"
 echo "Database username: hydro"
-echo "Database password: $db_password"
\ No newline at end of file
+echo "Database password: $db_password"
+echo "MINIO_ACCESS_KEY=$MINIO_ACCESS_KEY
+MINIO_SECRET_KEY=$MINIO_SECRET_KEY" >~/.hydro/env
diff --git a/install/ubuntu-2004.sh b/install/ubuntu-2004.sh
index a9a3f069..d576d81c 100644
--- a/install/ubuntu-2004.sh
+++ b/install/ubuntu-2004.sh
@@ -75,4 +75,6 @@ pm2 save
 # Done
 echo "Done"
 echo "Database username: hydro"
-echo "Database password: $db_password"
\ No newline at end of file
+echo "Database password: $db_password"
+echo "MINIO_ACCESS_KEY=$MINIO_ACCESS_KEY
+MINIO_SECRET_KEY=$MINIO_SECRET_KEY" >~/.hydro/env
diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 0279cd13..691de15b 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.15.6",
+    "version": "2.15.7",
     "bin": "bin/hydrooj.js",
     "main": "dist/loader.js",
     "typings": "dist/loader.d.ts",
diff --git a/packages/hydrooj/src/options.ts b/packages/hydrooj/src/options.ts
index 4ee655c1..19feaa4f 100644
--- a/packages/hydrooj/src/options.ts
+++ b/packages/hydrooj/src/options.ts
@@ -6,6 +6,14 @@ import { Logger } from './logger';
 const logger = new Logger('options');
 
 export = function load() {
+    const envFile = path.resolve(os.homedir(), '.hydro', 'env');
+    if (fs.existsSync(envFile)) {
+        const content = fs.readFileSync(envFile).toString();
+        for (const line of content.split('\n')) {
+            process.env[line.split('=')[0]] = line.split('=')[1];
+        }
+    }
+
     let f = path.resolve(process.cwd(), 'config.json');
     if (!fs.existsSync(f)) f = path.resolve(__dirname, 'config.json');
     if (!fs.existsSync(f)) f = path.resolve(os.homedir(), '.config', 'hydro', 'config.json');