I am tryng to Run Host command through PL/SQL
I am Using Following Code

CREATE OR REPLACE AND COMPILE JAVA SOURCE NAMED "Host" AS
import java.io.*;
public class Host {
  public static void executeCommand(String command) {
    try {
      String[] finalCommand;
      if (isWindows()) {
        finalCommand = new String[4];
        finalCommand[0] = "C:\\winnt\\system32\\cmd.exe";
        finalCommand[1] = "/y";
        finalCommand[2] = "/c";
        finalCommand[3] = command;
      }
      else {
        finalCommand = new String[3];
        finalCommand[0] = "/bin/sh";
        finalCommand[1] = "-c";
        finalCommand[2] = command;
      }
  
      final Process pr = Runtime.getRuntime().exec(finalCommand);
      new Thread(new Runnable(){
        public void run() {
          BufferedReader br_in = null;
          try {
            br_in = new BufferedReader(new InputStreamReader(pr.getInputStream()));
            String buff = null;
            while ((buff = br_in.readLine()) != null) {
              System.out.println("Process out :" + buff);
              try {Thread.sleep(100); } catch(Exception e) {}
            }
            br_in.close();
          }
          catch (IOException ioe) {
            System.out.println("Exception caught printing process output.");
            ioe.printStackTrace();
          }
          finally {
            try {
              br_in.close();
            } catch (Exception ex) {}
          }
        }
      }).start();
  
      new Thread(new Runnable(){
        public void run() {
          BufferedReader br_err = null;
          try {
            br_err = new BufferedReader(new InputStreamReader(pr.getErrorStream()));
            String buff = null;
            while ((buff = br_err.readLine()) != null) {
              System.out.println("Process err :" + buff);
              try {Thread.sleep(100); } catch(Exception e) {}
            }
            br_err.close();
          }
          catch (IOException ioe) {
            System.out.println("Exception caught printing process error.");
            ioe.printStackTrace();
          }
          finally {
            try {
              br_err.close();
            } catch (Exception ex) {}
          }
        }
      }).start();
    }
    catch (Exception ex) {
      System.out.println(ex.getLocalizedMessage());
    }
  }
  
  public static boolean isWindows() {
    if (System.getProperty("os.name").toLowerCase().indexOf("windows") != -1)
      return true;
    else
      return false;
  }

};
/
CREATE OR REPLACE PROCEDURE Host_Command (p_command  IN  VARCHAR2)
AS LANGUAGE JAVA
NAME 'Host.executeCommand (java.lang.String)';
/
EXEC Dbms_Java.Grant_Permission('SCHEMA-NAME', 'java.io.FilePermission', '<>', 'read ,write, execute, delete');

EXEC Dbms_Java.Grant_Permission('SCHEMA-NAME', 'SYS:java.lang.RuntimePermission', 'writeFileDescriptor', '');

EXEC Dbms_Java.Grant_Permission('SCHEMA-NAME', 'SYS:java.lang.RuntimePermission', 'readFileDescriptor', '');
SET SERVEROUTPUT ON SIZE 1000000
CALL DBMS_JAVA.SET_OUTPUT(1000000);
BEGIN
  Host_Command (p_command => mv test1.txt test2.txt');
END;

But when I tried on a unix server I get the following error:
"Process err :/bin/sh: mv Not Found"

finalCommand[0] = "/bin/sh";
to
finalCommand[0] = "/bin ";

and what do you get?

thanks dbtoo2001, I Tried what you told But I am getting the Error
'can't exec: /bin is a directory'

Any Other Suggestion ??
Thanks
Uttam

It looks like it is not finding the mv command:
Process err :/bin/sh: mv Not Found"

do a which mv and see where it is located.  Then change your variable.