Execute unix command using java

Hello
Can we execute a unix command using java? If it is how we can execute. Is this affect the performance of the program.
Thanks

I tried what you said. But its not working and returning error message,
java.io.IOException: CreateProcess: ls -a error=2
     at java.lang.ProcessImpl.create(Native Method)
     at java.lang.ProcessImpl.<init>(Unknown Source)
     at java.lang.ProcessImpl.start(Unknown Source)
     at java.lang.ProcessBuilder.start(Unknown Source)
     at java.lang.Runtime.exec(Unknown Source)
     at java.lang.Runtime.exec(Unknown Source)
     at java.lang.Runtime.exec(Unknown Source)
If i try this statement,
Runtime.getRuntime().exec("c\windows\notepad");
It is working fine.
Any idea about this.
Plz ...........

Similar Messages

Executing UNIX command in Java

I am having problems executing a command in Java. Here's the code I have for executing:
Process p = Runtime.getRuntime().exec(cmd);
                                        BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
     while((display = input.readLine()) != null)
                         num_1 = Double.parseDouble(display);
                         percent = (num_1 * 100) / (50000000);
                    flip = 1;
                    catch(IOException e)
                    e.printStackTrace();
                    System.exit(1);
Now, when I run the script, I receive the following errors:
Exception occurred during event dispatching:
java.security.AccessControlException: access denied (java.io.FilePermission /Netadmin/UCDSNMP/bin/snmpdelta execute)
at java.lang.Throwable.fillInStackTrace(Native Method)
at java.lang.Throwable.fillInStackTrace(Compiled Code)
at java.lang.Throwable.<init>(Compiled Code)
at java.lang.Exception.<init>(Compiled Code)
at java.lang.RuntimeException.<init>(RuntimeException.java:47)
at java.lang.SecurityException.<init>(SecurityException.java:39)
at java.security.AccessControlException.<init>(AccessControlException.java:57)
at java.security.AccessControlContext.checkPermission(Compiled Code)
at java.security.AccessController.checkPermission(Compiled Code)
at java.lang.SecurityManager.checkPermission(Compiled Code)
at java.lang.SecurityManager.checkExec(SecurityManager.java:789)
at java.lang.Runtime.exec(Compiled Code)
at java.lang.Runtime.exec(Compiled Code)
at java.lang.Runtime.exec(Runtime.java:152)
at snmp.actionPerformed(Compiled Code)
at java.awt.Button.processActionEvent(Button.java:308)
at java.awt.Button.processEvent(Button.java:281)
at java.awt.Component.dispatchEventImpl(Compiled Code)
at java.awt.Component.dispatchEvent(Compiled Code)
at java.awt.EventQueue.dispatchEvent(Compiled Code)
at java.awt.EventDispatchThread.pumpOneEvent(Compiled Code)
at java.awt.EventDispatchThread.pumpEvents(Compiled Code)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:83)
The user is entering the parameters for the UNIX command from a Java applet. Everything looks right, but I can't seem to run the file? Please help! All is appreciated.
Jason Banks
Northeastern University

Sorry, this is a bug that I've reported -- see Sun's response and my original report (along with how to get around the problem) shown below:
Hi Vira Van.,
The bug you have reported is a duplicate of Bug ID: 4522533.
Thank you for providing us with additional information
that can be used in the resolution of this bug.
This bug can be monitored via the the Java Developer
Connection Bug Parade at:
http://developer.java.sun.com/developer/bugParade/index.jshtml
The Java Developer Connection is a free channel that is
maintained by staff here at Sun. Access this web page to join:
http://developer.java.sun.com/servlet/RegistrationServlet
The home page for the JDC is:
http://java.sun.com/jdc
Regards,
Girish
----------------- Original Bug Report-------------------
category : java
release : 1.4
subcategory : jar
type : bug
synopsis : signed applet: bad major version number on NN4.79 and ClassNotFound in IE5.5
description : FULL PRODUCT VERSION :
java version "1.4.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-b92)
Java HotSpot(TM) Client VM (build 1.4.0-b92, mixed mode)
FULL OPERATING SYSTEM VERSION : Windows 98 [Version
4.10.2222]
ADDITIONAL OPERATING SYSTEMS :
BROWSERS: Netscape Navigator 4.79
        : Internet Explorer 5.5
EXTRA RELEVANT SYSTEM CONFIGURATION :
Applet failed to start in Netscape, the following error
message appeared in the Java Console:
Netscape Communications Corporation -- Java 1.1.5
Type '?' for options.
Symantec Java! ByteCode Compiler Version 210.065
Copyright (C) 1996-97 Symantec Corporation
# Applet exception: error: java.lang.ClassFormatError: Bad
major version number
java.lang.ClassFormatError: Bad major version number
at java.lang.ClassLoader.defineClass(Compiled Code)
at netscape.applet.AppletClassLoader.findClass(Compiled
Code)
at netscape.applet.AppletClassLoader.loadClass1(Compiled
Code)
* at netscape.applet.AppletClassLoader.loadClass(Compiled
Code)
at netscape.applet.AppletClassLoader.loadClass(Compiled
Code)
at
netscape.applet.DerivedAppletFrame$LoadAppletEvent.dispatch(
Compiled Code)
at
java.awt.EventDispatchThread$EventPump.dispatchEvents(Compil
ed Code)
at java.awt.EventDispatchThread.run(Compiled Code)
at
netscape.applet.DerivedAppletFrame$AppletEventDispatchThread
.run(Compiled Code)
The same applet
A DESCRIPTION OF THE PROBLEM :
Unable to run signed applet with Netscape 4.79 and IE5.5
native JVM.
REGRESSION. Last worked in version 1.3.1
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1.compile program and copy class files to a temp directory
2.sign the applet for Netscape as follows:
signtool -k aok -d \progra~1\netscape\users\viravan -Z
FIO.jar temp
3.sign the applet for Internet Explorer as follows:
cabarc -p n FileIO.cab FileIO*.class
setreg 1 true
makecert -sk aok -n "CN=aok" aok.cer
cert2spc aok.cer aok.spc
signcode -j javasign.dll -jp LOWX -spc aok.spc -k aok
FileIO.cab
Run the applet with the following HTML file:
<html><head><Title>Self-Signed Applet</Title>
<script>
document.layers ? parm=1 : parm=0;
</script>
<body>
This file I/O applet lets you read and write to the user's
local disk.<br>
<br>
<script>
document.writeln('<APPLET CODE = "FileIO" CODEBASE = "."
ARCHIVE = "FIO.jar" WIDTH = 10 HEIGHT = 10 NAME = "JSF">');
document.writeln('<param name="Netscape"
value="'+parm+'">');
document.writeln('<param name="cabbase"
value="FileIO.cab">');
document.writeln('</APPLET>');
</script>
</body>
</html>
EXPECTED VERSUS ACTUAL BEHAVIOR :
A frame with a textarea and some buttons should popup in the
center of the screen.
ERROR MESSAGES/STACK TRACES THAT OCCUR :
Applet signed with signtool failed to start in Netscape, the following error
message appeared in the Java Console:
Netscape Communications Corporation -- Java 1.1.5
Type '?' for options.
Symantec Java! ByteCode Compiler Version 210.065
Copyright (C) 1996-97 Symantec Corporation
# Applet exception: error: java.lang.ClassFormatError: Bad major version number
java.lang.ClassFormatError: Bad major version number
at java.lang.ClassLoader.defineClass(Compiled Code)
at netscape.applet.AppletClassLoader.findClass(Compiled Code)
at netscape.applet.AppletClassLoader.loadClass1(Compiled Code)
* at netscape.applet.AppletClassLoader.loadClass(Compiled Code)
at netscape.applet.AppletClassLoader.loadClass(Compiled Code)
at netscape.applet.DerivedAppletFrame$LoadAppletEvent.dispatch(Compiled Code)
at java.awt.EventDispatchThread$EventPump.dispatchEvents(Compiled Code)
at java.awt.EventDispatchThread.run(Compiled Code)
at netscape.applet.DerivedAppletFrame$AppletEventDispatchThread.run(Compiled
Code)
The same applet signed with signcode failed to start in Internet explorer, the
error message in the Java Console is:
Error loading class: FileIO
java.lang.NoClassDefFoundError
java.lang.ClassNotFoundException: FileIO
        at com/ms/vm/loader/URLClassLoader.loadClass
        at com/ms/vm/loader/URLClassLoader.loadClass
        at com/ms/applet/AppletPanel.securedClassLoad
        at com/ms/applet/AppletPanel.processSentEvent
        at com/ms/applet/AppletPanel.processSentEvent
        at com/ms/applet/AppletPanel.run
        at java/lang/Thread.run
This bug can be reproduced always.
---------- BEGIN SOURCE ----------
import java.io.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class FileIO extends Applet implements ActionListener {
   public static void main(String[] args) {
      new FileIO();
      F.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent e) {
            System.exit(0);
   public void init() {
      String tmp=getParameter("Netscape");
      if (tmp!=null) {
         if (tmp.equals("1")) {
            try {
netscape.security.PrivilegeManager.enablePrivilege("UniversalFileAccess");
               NS=true;
            } catch (Throwable exception) {}
      new FileIO();
      F.setResizable(false);
   public void stop() {
      F.dispose();
   public FileIO() {
      newline=System.getProperty("line.separator");
      F.setLayout(new BorderLayout(0,0));
      String line,inbuf="";
      String newline=System.getProperty("line.separator");
      text=new TextArea(inbuf,24,80,TextArea.SCROLLBARS_BOTH);
      text.setFont(new Font("Courier",Font.PLAIN,12));
      text.setBackground(Color.cyan);
      text.setForeground(Color.black);
      F.add("Center",text);
      Panel pan=new Panel();
      pan.setLayout(new FlowLayout(1,0,0));
      pan.setBackground(Color.yellow);
      TF=new TextField(40);
      TF.setFont(new Font("Courier",Font.PLAIN,12));
      pan.add(TF);
      OP=new Button("Open");
      OP.addActionListener(this);
      pan.add(OP);
      FS=new Button("Save");
      FS.addActionListener(this);
      pan.add(FS);
      SA=new Button("Save-As");
      SA.addActionListener(this);
      pan.add(SA);
      reset=new Button("Reset");
      reset.addActionListener(this);
      pan.add(reset);
      F.add("South",pan);
      F.pack();
      Dimension screen=Toolkit.getDefaultToolkit().getScreenSize();
      Dimension size=F.getSize();
      int X=(screen.width-size.width)/2;
      int Y=(screen.height-size.height)/2;
      F.setLocation(X,Y);
      F.setVisible(true);
   public void actionPerformed(ActionEvent event) {
      String tmp="";
      String O=text.getText();
      StringTokenizer tkn=new StringTokenizer(O,newline);
      int ntkn=tkn.countTokens();
      Object ev=event.getSource();
      if (ev.equals(OP)) {
         FileDialog fd=new FileDialog(F,"File to open",FileDialog.LOAD);
         fd.setFile("*.java");
         fd.show();
         tmp=fd.getDirectory();
         if (fd.getFile()==null) {text.requestFocus(); return;}
         tmp+=fd.getFile();
         TF.setText(tmp);
         try {
            if (NS)
{netscape.security.PrivilegeManager.enablePrivilege("UniversalFileRead");}
            BufferedReader reader=new BufferedReader(new FileReader(tmp));
            String line;
            String crlf="";
            tmp="";
            while ((line=reader.readLine())!=null) {
               tmp+=crlf+line;
               crlf="\n";
            reader.close();
            text.setText(tmp);
         } catch (Throwable e) {
            e.printStackTrace();
      } else if (ev.equals(FS) || ev.equals(SA)) {
         try {
            if (ev.equals(SA)) {
               FileDialog fd=new FileDialog(F,"File to save",FileDialog.SAVE);
               fd.setFile("*.java");
               fd.show();
               tmp=fd.getDirectory();
               tmp+=fd.getFile();
            } else {
               tmp=TF.getText();
            if (tmp.length()==0) {text.requestFocus(); return;}
            if (tmp.indexOf(".java")<0) tmp+=".java";
            TF.setText(tmp);
            if (NS)
{netscape.security.PrivilegeManager.enablePrivilege("UniversalFileWrite");}
            FileOutputStream fos=new FileOutputStream(tmp);
            BufferedWriter out=new BufferedWriter(new OutputStreamWriter(new
DataOutputStream(fos)));
            for (int i=0;i<ntkn;i++) out.write(tkn.nextToken()+newline);
            out.flush();
            out.close();
            if (NS)
{netscape.security.PrivilegeManager.revertPrivilege("UniversalFileWrite");}
            System.out.println(tmp+" saved");
         } catch (Throwable e) {
            e.printStackTrace();
      } else if (ev.equals(reset)) {
         text.setText("");
         TF.setText("");
      text.requestFocus();
   private String replace(String input, String srch, String repl) {
      int i=input.indexOf(srch);
      while (i>=0) {
         input=input.substring(0,i)+repl+input.substring(i+srch.length());
         i=input.indexOf(srch);
      return input;
   private Button OP,FS,SA,reset,TB;
   private boolean newLine,NS=false;
   private TextArea text;
   private TextField TF;
   private final char NL='\n';
   private String content,newline;
   private static Frame F=new Frame("FileIO");
---------- END SOURCE ----------
CUSTOMER WORKAROUND :
build the signed applet with SDK1.3.1 or make it a signed
applet that uses Java Plugin 1.4.0 (i.e., sign it with jarsigner).
workaround :
suggested_val :
cust_name : Vira Van.
dateCreated : 2002-03-24 19:52:18.4
dateEvaluated : 2002-04-01 18:48:10.858

Running unix command using java shows error

Hi All,
I am trying to run UNIX move command using Java exec method but its throwing error, unable to rename. Here below is the code i am trying to run to move all files from one directory to another directory. source and destination directory exists.
public class Demo
    public static void main(String args[])
        try
            Runtime rt = Runtime.getRuntime();
            Process proc = rt.exec("mv /home/demo1/* /home/demo2");
            int exitVal = proc.waitFor();
            System.out.println("Process exitValue: " + exitVal);
        } catch (Throwable t)
            t.printStackTrace();
}if i give "mv /home/demo1 /home/demo2" in exec method, its working, with * character its giving problem.
Please help me in resolving the problem.
Thank you

Characters like *, >, &, |, etc. are interpreted by the command shell--that is by the bash, zsh, etc. programs. When you execute a command with ProcessBuilder or Runtime.exec, you're not going through one of those shells, so their interpretation of those characters is not available.
In your code, the character * is being delivered directly to the mv command (which doesn't think * is anything special), as opposed to being turned into a list of files and directories as it would be when it's interpreted by the shell. The mv command doesn't know anything about the * character being special.
If you want to have those shell interpretations, you need to execute the command through a shell. One example is like so, but a) you'll want to read up on the methods in exec() that take arrays of String, and b) you'll want to read up on ProcessBuilder, and c) you'll need to check your shell's man pages to see the exact syntax and arguments.
runtime.exec("/bin/bash -c 'mv x/* y'");

Execute unix commands from Java

Hi,
I have a client application running on windows. This client should connect to a unix server and check for the existence of a file and display the result as "File found/File not found". In order to connect from windows to the unix server, I used the sockets and the connection is successfully established. The second part is to check for the presence of the file in unix server. I searched in google.com and the option I found to execute a unix command from java is the "Runtime.exec()". Runtime.exec is considered as the less effective (not a favorable) one.
Is there any other option available (other than the Runtime) to execute the unix command from java? Can you please let me know.
Thanks a lot
Aishu

So, please let me know how I can execute the above unix commands without Runtime.exec()You have a client and a server.
You want something to run on the server, not the client.
That means that something must in fact being running on the server before the client does anything at all.
For example telnet. Or a J2EE server application.
So is something like that running?
If not then there absolutely no way to do what you want, even with Runtime.exec().
If yes then what you do depends on what is running. So Runtime.exec() would be pointless if a J2EE server was running.

How to execute unix command in java or jsp

have a peace day,
please send some sample code for
"execute the unix command in java or jsp"
thank you
regards
rex

i execute this coding
its compiling. while running i get the error " java.io.IOException: CreateProcess: \ls-l error=2 "
import java.io.*;
import java.util.*;
public class Test
   public static void main(String[] args) throws Exception
     try
          String[] cmd = {"/ls-l"};
Runtime.getRuntime().exec(cmd);
     catch (Exception e)
           System.out.println(e);
}what can i do for that
thank u

Execute Unix command from Java program running on windows

Hello,
I need to write a java program that fetches file count in a particular unix machine directory. But java program will be running on windows machine.
The program should execute unix list command and fetch the output of that command.
Can anyone help me on this?
Thanks.

Hi there,
I had a similiar problem, though years ago. It was to have a java program execute any other. Lately, I've had to have a java program running on a unix machine execute a shell script. Entirely two different scenarios. I'm not sure what you will need for your app, but look into this:
Java Native Interface for executing C/C++ code.
C/C++ Code for launching the program you need to run.
java.lang.Runtime(?).exec(....)
With a combination of that stuff, you can make a launcher for any os that has Java running on it, and with Runtime, you can exec() pretty near any sort of unix shell or app command you'd like.
Good luck.
Tim

Executing Unix command through Java

Hi,
Hi, I am trying to run some unix command through:
Runtime.getRuntime().exec("some unix command line");
I am running the code on Linux platform. However, I always got some errors. Here are the stack trace of them:
java.io.IOException: Cannot allocate memory
java.io.IOException: java.io.IOException: Cannot allocate memory
        at java.lang.UNIXProcess.<init>(UNIXProcess.java:148)
        at java.lang.ProcessImpl.start(ProcessImpl.java:65)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:451)
        at java.lang.Runtime.exec(Runtime.java:591)
        at java.lang.Runtime.exec(Runtime.java:429)
        at java.lang.Runtime.exec(Runtime.java:326)Anybody has any idea why is this happening? Thanks.
Aulia

Hi, thanks for your reply so far. I tried the following code:
     public boolean executeCommand() {
          boolean success = true;
          for (int i = 0; i < 5; i++) {
               Process p = null;
               try {
                    p = Runtime
                    .getRuntime()
                    .exec("ls");
                    InputStreamReader inR = new InputStreamReader(p
                              .getErrorStream());
                    BufferedReader buf = new BufferedReader(inR);
                    String line;
                    while ((line = buf.readLine()) != null) {
                         System.out.println(line);
                    p.destroy();
               } catch (Exception e) {
                    System.err.println(e.getMessage());
                    e.printStackTrace();
                    success = false;
               } finally {
                    p = null;
          return success;
     }However, it still throws the same exception. Yes, I put it in a tight loop, but not recursively.

Problem about Executing Unix command in java

Hi All,
Does someone know why the following codes didn't run correctly?
String cmd = "tar cvf 123.tar *.*";
try
Runtime rt = Runtime.getRuntime();
rt.exec(cmd);
catch (Exception ex)
ex.printStackTrace();
Thanks.

Because "*" is interpreted by the shell--bash, zsh, ksh, sh, csh, tcsh...
The shell turns *.java into a.java b.java. The tar program never sees the *.
You don't typcially have these shells when you invoke a command like that, so the tar program sees the * you pass and takes is as a file name. It's like adding quotes or a backslash in a terminal window:$ tar cvf foo.tar '*.java' So either use the File and FileFilter classes to get a list of the files you want to pass and send that to Runtime.exec, or Runtime.exec a shell and pass tar as its command.
For bash, I think what you'd pass to Runtime.exec would be something like sh -c tar cvf foo.tar *.java but check the man page for your shell to find out the details of how to invoke it in non-interactive mode and pass it a command.

Problem in executing a unix command through java

hi
i'm trying to execute unix command through java
simple shell command like "ls -l >test " but i'm not able to see the result.
there are no error messages.
Code is:
import java.lang.Runtime.*;
class ExecDemo
     public static void main(String[] args)
          Runtime r=Runtime.getRuntime();
          Process p=null;
          try
               p=r.exec("ls -l > test");
          catch (Exception e)
               System.out.println("Error executing nedit.");
}can anyone help please.

get the the inputStream of the runtime object after executing the command.
now use the readLine() function until it becomes null.
egs: with reference to ur code.
InputStream is=p.getInputStream()
while(is!=null)
String s=is.readLine();
if the command don't execute try giving the full path also like /sbin/ls -l

Spanish characters getting garbled while executing command using Java code

Hi,
I try to execute a command using java code. output of the command contains spanish characters. Few of these characters getting garbled after the command execution.
Runtime r = Runtime.getRuntime();
          Process p = null;
String pgm="ipconfig /all";
          try
                    p = r.exec(pgm);
BufferedReader br=new BufferedReader(new InputStreamReader
                              (p.getInputStream()));
while((val = br.readLine()) != null){ System.out.println(val);
          catch (Exception e)
                    return (null);
I tried to run the code using -Duser.language=es -Duser.region=ES -Dfile.encoding=Cp850, but this did nt help. I could see the outputs properly in command prompt,
If i redirect the output to a text file , it is getting garbled,
Please let me know to solve this issue.

884543 wrote:
Hi,
I try to execute a command using java code. output of the command contains spanish characters. Few of these characters getting garbled after the command execution.
Runtime r = Runtime.getRuntime();
          Process p = null;
String pgm="ipconfig /all";
          try
                    p = r.exec(pgm);
BufferedReader br=new BufferedReader(new InputStreamReader
                              (p.getInputStream()));
while((val = br.readLine()) != null){ System.out.println(val);
          catch (Exception e)
                    return (null);
I tried to run the code using -Duser.language=es -Duser.region=ES -Dfile.encoding=Cp850, but this did nt help. I could see the outputs properly in command prompt,
If i redirect the output to a text file , it is getting garbled,
Please let me know to solve this issue.Set the character set to UTF-8 to your InputStreamReader, for More details on usage refer the java api :
http://download.oracle.com/javase/6/docs/api/java/io/InputStreamReader.html

Invoking Unix command with java stored procedure

Hi,
I have a perfectly working environment and now I am trying to replicate the same in another server. I have a java stored procedure which invokes the Unix command using java Runtime.exec() in my code named "run". I am sure that the code is called and the java class run is resolved in oracle as I could see that in dba_java_resolvers dictionary. But I am not sure whether the function in java is called or whether a exception is thrown. how to identify this? Could there be any thing to do with settings in oracle side? please help me.
Thanks in advance,
Marutha

Hi,
Do you get any output while running the code?
I'm testing similar solution and if there are any errors or Oracle can't execute the program due to permissions or other issues the error information will be displayed. Also in the Java class itself you need to catch exceptions and print stack trace to standard output.
declare
x number;
begin
dbms_output.enable(1000000);
dbms_java.set_output(1000000);
x:=system_command.run_command('testconnect.sh');
dbms_output.put_line('Returned value='||x);
exception
when others then dbms_output.put_line('Sql error='||substr(sqlerrm,1,250));
end;
<system_command.run_command> - replace with a call to your java stored procedure.

To run a command using java code

hi all,
There is a command
"java -jar selenium-server.jar -interactive"
which i am running through command prompt after going to D:\MyFolder\Examples .
i want to execute this command using java code .please help

subratjyetki wrote:
please answer in detail or if posible can u give the code for thisThe detail is given in the reference. Why don't you read it?
I could give you the code but it will cost you ?100 per hour.

"at" UNIX Command in Java Program

Friends,
1. "at" command in UNIX execute Unix command at a scheduled time. 2. For each user there will be a table maintained internally which can be accessed by "at" with "-l" argument.
3. A mail will be sent to the owner with the output of the commands as a message.
I tried to run the "at" command of Unix in JSP, which gets succesfully executed in Oracle 10g App Server container (Installed in Solaris machine). I have tested the successful execution of command with the log file. But I haven't got any mail for the output. If anyone had any idea, please help me.
The code I have wtitten is
Runtime rt = Runtime.getRuntime();
Process proc = rt.exec(new String[] {"sh","-c","at 2115 Dec 7 < /export/home/usr1/abc.sh"});
InputStream stderr = proc.getErrorStream();
InputStreamReader isr = new InputStreamReader(stderr);
BufferedReader br = new BufferedReader(isr);
String line = null;
logger.info("<ERROR>");
while ( (line = br.readLine()) != null)
logger.info(line);
logger.info("</ERROR>");
int exitVal = proc.waitFor();
logger.info("Process exitValue: " + exitVal);
My doubts are:
1. Who is the owner of the output of "at"command, which gets executed under Oracle 10g App Server container?
2. If no one is the owner, then where will the output of "at" command will go?
3. Is there any other way to execute "at" command of UNIX in java program? If so, then please help me.
Thanks in advance.
regards
Nandha Kumar.M

filestream I have to ask - what's a chav ?
I have doubts abut what it is :-)
Seriously though, what is that an abbreviation for?
That's a new one to me.
http://www.chavscum.co.uk
chavs are roughly analogous to rednecksI wouldn't use that analogy. While both may lack certain social graces, rednecks typically don't receive ASBOs.
Chavs favor small cars with lots of bling whereas rednecks are likely to drive a pickup or a large sedan.
Chavs have pitbulls in their yards (gardens), rednecks an '84 Mustang LX on cinder blocks.
etc, etc.
Message was edited by:
filestream
Message was edited by:
filestream

How execute UNIX commands?

Hi, does anyone know how to execute an UNIX command in Java? Command->
find -name '*.dmp' in a directory called /db/Backup? What are the parameters that i've to pass in for this function-> Runtime.getRuntime().exec(); ??? And how do i get the filenames of the files searched?

Do i have to pass the path to-> Runtime.getRuntime().exec();Of course. Just do the following:
final String command = ;
Runtime.getRuntime().exec("find /tmp -name Bar.class");Or, you can use the alternative exec and pass your command-line arguments in a String array.
Check the AP:
http://java.sun.com/j2se/1.4.1/docs/api/java/lang/Runtime.html#exec(java.lang.String[])

Executing Unix Commands

Hi
I realise there is a Runtime class to help execute Unix commands from within Java code, but how would this work if the command required a password.
For example, were I to try to execute:
ssh -Y myserver.domain.com -u Myself -p
How would this work with supplying the password (which is prompted for after the command is sent to the shell)?
Thanks
Dave

from the ssh man page under "environment variables":     SSH_ASKPASS
              If ssh needs a passphrase, it will read the passphrase from the
              current terminal if it was run from a terminal. If ssh does not
              have a terminal associated with it but DISPLAY and SSH_ASKPASS
              are set, it will execute the program specified by SSH_ASKPASS
              and open an X11 window to read the passphrase. This is particu-
              larly useful when calling ssh from a .xsession or related
              script. (Note that on some machines it may be necessary to
              redirect the input from /dev/null to make this work.)

Execute unix command using java

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