diff --git a/src/main/java/com/github/hcsp/shell/Fork.java b/src/main/java/com/github/hcsp/shell/Fork.java
index 28e0700..11bacf7 100644
--- a/src/main/java/com/github/hcsp/shell/Fork.java
+++ b/src/main/java/com/github/hcsp/shell/Fork.java
@@ -3,6 +3,7 @@
 import java.io.File;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.util.Map;
 
 public class Fork {
     public static void main(String[] args) throws Exception {
@@ -10,6 +11,21 @@ public static void main(String[] args) throws Exception {
         // 工作目录是项目目录下的working-directory目录（可以用getWorkingDir()方法得到这个目录对应的File对象）
         // 传递的命令是sh run.sh
         // 环境变量是AAA=123
+        //设置1.可执行程序。2.参数
+        ProcessBuilder builder = new ProcessBuilder("sh", "run.sh");
+
+        //设置工作目录
+        builder.directory(getWorkingDir());
+
+        //设置环境变量
+        Map<String, String> env = builder.environment();
+
+        env.put("AAA", "123");
+        //从定向到输出到文件
+        builder.redirectOutput(getOutputFile());
+        //输出到当前进程
+//        pb.inheritIO();
+        builder.start().waitFor();
     }
 
     private static File getWorkingDir() {
@@ -20,4 +36,4 @@ private static File getWorkingDir() {
     private static File getOutputFile() {
         return new File(getWorkingDir(), "output.txt");
     }
-}
+}
\ No newline at end of file
diff --git a/working-directory/output.txt b/working-directory/output.txt
index e69de29..675331d 100644
--- a/working-directory/output.txt
+++ b/working-directory/output.txt
@@ -0,0 +1,7 @@
+AAA is: 123
+total 40
+-rw-r--r--   1 niuweizhe  staff    12B Dec 28 19:17 output.txt
+drwxr-xr-x  13 niuweizhe  staff   416B Dec 28 19:17 ..
+-rw-r--r--   1 niuweizhe  staff    47B Dec 27 17:19 run.sh
+drwxr-xr-x   5 niuweizhe  staff   160B Dec 27 17:19 .
+-rw-r--r--   1 niuweizhe  staff    11K Dec 27 17:19 .hidden.txt