diff --git a/src/main/java/com/github/hcsp/shell/Fork.java b/src/main/java/com/github/hcsp/shell/Fork.java
index 28e0700..6cd8aa0 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 +11,18 @@ 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
+        // 可执行程序 // 2 参数
+        ProcessBuilder pb = new ProcessBuilder("sh","run.sh");
+        // 工作路径
+        pb.directory (getWorkingDir ());
+        // 环境变量
+        Map<String,String > envs = pb.environment();
+        envs.put ("AAA","123");
+        //pb.inheritIO ();
+        pb.redirectOutput (getOutputFile ());
+        pb.start ().waitFor ();
+
+
     }
 
     private static File getWorkingDir() {
diff --git a/working-directory/output.txt b/working-directory/output.txt
index e69de29..d3c8754 100644
--- a/working-directory/output.txt
+++ b/working-directory/output.txt
@@ -0,0 +1,7 @@
+AAA is: 123
+total 40
+-rw-r--r--   1 a  staff    12B Apr 29 09:53 output.txt
+drwxr-xr-x  13 a  staff   416B Apr 29 09:53 ..
+-rw-r--r--   1 a  staff    47B Apr 29 07:38 run.sh
+drwxr-xr-x   5 a  staff   160B Apr 29 07:38 .
+-rw-r--r--   1 a  staff    11K Apr 29 07:38 .hidden.txt