How to execute a system command on a remote UNIX server?

I would like to execute a system command (for example "df") on a remote UNIX machine.
A simple example would be welcome...
Thanks

I would like to execute a system command (for example
"df") on a remote UNIX machine.
A simple example would be welcome...None will be forthcoming.
Executing a process is relatively simple. However doing this on a remot system is another matter.
See http://sourceforge.net/projects/sshtools/
and/or http://javassh.org/space/start
Other resources to be found with Google.

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Hi,
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Any help on how to execute Operating System commands from stored procedures will be appreciated.
Nanditha.

Search the forums for 'External Procedure' and you will find example code that has been posted before.

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System: IBM pSeries AIX
Oracle: 11g Enterprise
Is there a quick way to execute operating system commands from PL/SQL?
Without creating a JAVA class....
I need to execute a Loader script.
I want to do this from within PL/SQL.
I need to to do 4 things.
Three require SQL scripts.
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Just let me know.

Is there a quick way to execute operating system commands from PL/SQL?
NO
Without creating a JAVA class....
I need to execute a Loader script.
I want to do this from within PL/SQL.
WHY ON EARTH, such action will create a new connection and become a resource hog?
I need to to do 4 things.
Three require SQL scripts.
The fourth is SQL*Loader.
The usual way is with a UNIX script calling 3 SQL scripts and one Loader control file.
Which is perfect for the purpose.
Is there way to do all this from within ONE PL/SQL SCRIPT ??
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Sybrand Bakker
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Hi Experts
Looking for advise if one can use operation system commands using TSQL without enabling xp_cmdshell.
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Best Regards
khalil

>but the user needs some operating system commands to execute for file manipulation from sql server session
See article here
http://www.mssqltips.com/sqlservertip/2014/replace-xpcmdshell-command-line-use-with-sql-server-agent/:
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I need to run something from the command-line, but based on best practices xp_cmdshell has been disabled. The task that needs to run is an internal process that will originate from within SQL Server. Is there a way to do this without using xp_cmdshell?
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The use of xp_cmdshell is generally frowned upon and is now recommended to be disabled, unless it is absolutely necessary. There is a solution that works around this restriction via the use of SQL Server Agent.
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Kalman Toth Database & OLAP Architect
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New Book / Kindle: Beginner Database Design & SQL Programming Using Microsoft SQL Server 2014

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Hello,
I would like to execute a systemcall out of a PL/SQL-package (e.g. execute a shell script). Seems like that this is just possible with a external procedure call.
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Rgds
JH

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Hello
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Here is some code to tell you how to do:
First a small Java program that taker a string as a parameter and executes it as an os-command
import java.lang.Runtime;
import java.lang.Process;
public class Commands extends Object {
* Constructor
public Commands() {
// On NT the command should be like this "cmd /c del c:\temp\readme.txt"
// exec execute('cmd /c del c:\temp\readme.txt');
public static void execute (String cmd ) {
try {
Process p = Runtime.getRuntime().exec(cmd);
try {
p.waitFor();
catch (java.lang.InterruptedException intex ) {
intex.printStackTrace();
System.out.println("Return = "+ p.exitValue());
System.out.println(" Done ...");
catch ( java.io.IOException iox) {
iox.printStackTrace();
===================end of java ====
Use loadjava to load it into the database and create a pl/sql wrapper around the java code.
See the manual about loadjava details.
Log in to sqlplus as SYSTEM and create a role for this purpose e.g. 'JAVA_ROLE'
and exec the following as SYSTEM or SYS to make sure the user has the the needed privs.
dbms_java.grant_permission('JAVA_ROLE','SYS:java.io.FilePermission','<<ALL FILES>>','read,write,execute,delete');
dbms_java.grant_permission('JAVA_ROLE','SYS:java.lang.RuntimePermission','writeFileDescriptor',null);
dbms_java.grant_permission('JAVA_ROLE','SYS:java.lang.RuntimePermission','readFileDescriptor',null);
and you're done.

How to call Operating System commands / external programs from within APEX

Hi,
Can someone please suggest how to call Operating Systems commands / external programs from within APEX?
E.g. say I need to run a SQL script on a particular database. SQL script, database name, userid & password everything is available in a table in Oracle. I want to build a utility in APEX where by when I click a button APEX should run the following
c:\oracle\bin\sqlplusw.exe userud/password@database @script_name.sql
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Thanks & Regards,

Hi Guys,
I have reviewed the option of using scheduler and javascript and they do satisfy my requirements PARTIALLY. Any calls to operating system commands through these features will be made on the server where APEX is installed.
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sqlplusw.exe user/password@database @script1.sql
sqlplusw.exe user/password@database @script2.sql
sqlplusw.exe user/password@database @script3.sql
sqlplusw.exe user/password@database @script4.sql
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Hi All,
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for further reference check the below link
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html?page=3
and don't forget to go through API documentation for java.lang package
http://java.sun.com/j2se/1.5.0/docs/api/java/lang/package-summary.html
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File file = new File("<present_directory_path>");
if(file.isDirectory()){
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fileNames = null;
        or for detailed info use
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}and please do not forget to go through File API Documentation provided as recommended by my fellow poster.
hope this might help :)
REGARDS,
RaHuL

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hi,
I have been trying this out since a long time. How do I send system commands to command.com or cmd.exe from a java program and an output of the executed command back to the java application.
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import java.io.*;
public class cmddemo2
public static void main(String arg[])
try
System.out.println("cmd");
Process p=Runtime.getRuntime().exec("cmd.exe");
DataInputStream din=new DataInputStream(p.getInputStream());
DataOutputStream dout=new DataOutputStream(p.getOutputStream());
System.out.println("after streams");
String s;
dout.writeChars("type cmddemo2.java");
while((s=din.readLine())!="\n")
System.out.println(s);
dout.writeChars("dir");
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System.out.println(s1);
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attempting to run forms 6 on vista... the forms app attempts a call sqlplus using the host builtin to populate some tables before calling the report.
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the forms app attempts a call sqlplus using the host builtin to populate some tables before calling the report.What about putting the logic from the SQL*Plus-scripts into a database-procedure and call that instead. I think,, with the current approach you will get problems at least when you have to migrate to Web (e.g. Forms 10g).

How to use Operating System Commands while using define in sqlplus

How to use Operating System Commands while using define in sqlplus . The Host OS is Linux
define report_name=PROD_${host date "+%b"}.html
The above is not working.
The output should be
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Regards,
DB

of course I was talking nonsense: the problem here is the mixing of bind variables and DEFINE variables.
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variable snap1 number
variable snap2 number
variable rptname varchar2(20)
begin
SELECT min(snap_id) into :snap1 FROM dba_hist_snapshot WHERE CAST(begin_interval_time AS DATE) >= SYSDATE-1;
SELECT max(snap_id) into :snap2 FROM dba_hist_snapshot WHERE CAST(begin_interval_time AS DATE) >= SYSDATE-1;
end;
col file_name_value new_value report_name noprint
select 'PROD_'|| to_char(sysdate,'MON') || '_' || to_char(sysdate,'DD') file_name_value from dual;
define report_type = 'html'
define num_days=2
define begin_snap=:snap1
define end_snap=:snap2
@@?/rdbms/admin/awrrpt.sql

How do you clear system and application logs in a server?

Hello all,
How do you clear system and application logs in a server?
thanks,
mike

go to start button,all programs,assosories, System tools T event viewer. now select application & rt click & clear & do not save.similarly do for sytem too.

How to execute a cvs command using System Call?

hi all,
how to execute a cvs login command using system call ?
thanks,
dam

To anyone that reached this post and still dont have a hint, try this small sample - it logs on CVS using installed CVSNT and execute a fake update:
package testeCVS;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
public class execCMD
    String password="yourPassword";
    String directory="C:\\CVS\\yourPathToProject";
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    public int sendCMD(String[] command) throws IOException, InterruptedException
        ProcessBuilder pb = new ProcessBuilder(command);
        pb.directory(new File(directory));
        pb.redirectErrorStream(true); // merge stdout and stderr
        Process p = pb.start();
        InputStreamReader isr = new InputStreamReader(p.getInputStream());
        BufferedReader br = new BufferedReader(isr);
        String lineRead;
        StringBuilder buffer=new StringBuilder();
        System.out.println("Return of shell:");
        while ((lineRead = br.readLine()) != null)
            buffer.append(lineRead + "\n");
        System.out.println(buffer.toString());
        return p.waitFor();
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    public int sendDialogCMD(String[] command) throws IOException, InterruptedException
        ProcessBuilder pb = new ProcessBuilder(command);
        pb.directory(new File(directory));
        pb.redirectErrorStream(true); // merge stdout and stderr
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        PrintWriter writer = new PrintWriter( new OutputStreamWriter( p.getOutputStream() ));
        writer.println( password );
        writer.flush();
        InputStreamReader isr = new InputStreamReader(p.getInputStream());
        BufferedReader br = new BufferedReader(isr);
        String lineRead;
        StringBuilder buffer=new StringBuilder();
        System.out.println("Return of shell:");
        while ((lineRead = br.readLine()) != null)
            buffer.append(lineRead + "\n");
        System.out.println(buffer.toString());
        return p.waitFor();
    public static void main(String a[]) throws IOException, InterruptedException
        execCMD e=new execCMD();
        String[] command = new String[5];
        command[0] = "cvs";
        command[1] = "-q";
        command[2] = "-d";
        command[3] = ":pserver:yourUserID@localhost:2402/path/of/yourProject"; //in this case using CVS port 2402
        command[4] = "login";
        System.out.println("exit value=" + e.sendDialogCMD(command));
        command = new String[8];
        command[0] = "cvs";
        command[1] = "-q";
        command[2] = "-d";
        command[3] = ":pserver:yourUserID@localhost:2402/path/of/yourProject";
        command[4] = "-n";
        command[5] = "-q";
        command[6] = "update";
        command[7] = "-dA";
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}It is possible to send the password on the same command, but I had problems when the password had the character '@' because CVSNT took it as the separator between the username and server name. In that case the command is: ":pserver:yourUserID:yourPassword@localhost:2402/path/of/yourProject"

How to execute a shell command in java?

here, my environment is redhat 7, jdk 1.5.
i don't know how to use the shell command in java.
i want to use this function:
#include <stdlib.h>
int system(const char * string);
please give me some ideas. and Thank you so much if coming with a little demo.

i know i should use JNI. because i have to use C lib.
but i have already use JNI to wrapper the original code the cpp code and java code is :
//: appendixb:UseObjImpl.cpp
//# Tested with VC++ & BC++. Include path must
//# be adjusted to find the JNI headers. See
//# the makefile for this chapter (in the
//# downloadable source code) for an example.
#include <jni.h>
#include <stdlib.h>
extern "C" JNIEXPORT void JNICALL
Java_UseObjects_changeObject(
JNIEnv* env, jobject, jobject obj) {
jclass cls = env->GetObjectClass(obj);
jfieldID fid = env->GetFieldID(
cls, "aValue", "I");
jmethodID mid = env->GetMethodID(
cls, "divByTwo", "()V");
int value = env->GetIntField(obj, fid);
printf("Native: %d\n", value);
env->SetIntField(obj, fid, 6);
env->CallVoidMethod(obj, mid);
value = env->GetIntField(obj, fid);
system("preprocess -path sha.c");
printf("Native: %d\n", value);
} ///:~
//: appendixb:UseObjects.java
// From 'Thinking in Java, 2nd ed.' by Bruce Eckel
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
class MyJavaClass {
public int aValue;
public void divByTwo() { aValue /= 2; }
public class UseObjects {
private native void
changeObject(MyJavaClass obj);
static {
// System.loadLibrary("UseObjImpl");
// Linux hack, if you can't get your library
// path set in your environment:
System.load(
"/root/jproj/UseObjImpl.so");
public static void main(String[] args) {
UseObjects app = new UseObjects();
MyJavaClass anObj = new MyJavaClass();
anObj.aValue = 2;
app.changeObject(anObj);
System.out.println("Java: " + anObj.aValue);
} ///:~
i modify this two file which is from TIJ-2edition.
the output is
Native: 2
Native: 3
Java: 3
but what i want to be executed "preprocess -path sha.c" does not work.
i have change the command to, such as "df", "ls" etc. but none of them works
please help me.

How to execute a system command on a remote UNIX server?

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