Programming :: Executing "su" Command From Java
Nov 11, 2010
I'm developing a Servlet which when it gets a request, it has to execute a command. I've tried in Windows and it works fine, but when I "install" my web app in Linux, if I try to execute the commands I get permission error.
An example of one command I'm trying to execute is: Runtime.getRuntime.exec("rm file_name"); -> This commands outputs that I don't have permissions.
If I add "su" before the command, how do I add the password?
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Aug 24, 2010
what we are trying to do is, to let the customer click a button in the web browser, and then the web server to call a shell script to do the work. The output from the stdout && stderr of the script should be displayed in the web browser once finished or timeout, along with the exit code of the script.
The shell script is however not on the web server, but on another app server. So to call this script from the web server as the identity 'tomcat':
Code:
$ sh appuser@app-server:$appbin/app-script
The .ssh/id_rsa.pub thing is done, and we have no problem doing this in the command line so far.
Our loaded ex-colleage has left us the webpages (jsp) with code like these:
Code:
<%@ include file="jsp_functions.jsp" %>
<%
String cmd = "sh $appbin/app-script";
ExecResult r = new ExecResult();
[Code].....
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Jul 8, 2011
I need to execute an external command with Python from Web. I know there is subprocess module that executes external programs but I'm trying to execute a command registered for the execution of a program. In this case when I execute my file in the shell everything is Ok, but from the Web it doesn't work.
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Jul 26, 2010
I've just installed java (jre-6u21-linux-i586.bin) on Red Hat 4.4 AS and issued this command to check the java version: java -versionand got :bash :java: command not found
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Feb 12, 2011
I'm trying to execute the following command within a bash script:
Code:
tac /var/log/system.log | head -1
The script I wrote is:
[code]...
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Nov 11, 2010
I am running a java application on centos. For now I have a gsm modem connected via the the usb cable. Below is the message I get when I type the command dmesg | grep tty
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
00:0c: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
usb 2-2: pl2303 converter now attached to ttyUSB0
[code]....
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Oct 29, 2010
I am trying to make a java application run on a barebone computer connected to a tv screen trough hdmi. I want to make this run as light as possible so gnome probably is overkill. currently I'm running fluxbox but I would like to encapsulate video and some other gui stuff in the program and run it command line(trough startup script.) Another way to do this would be running it when fluxbox starts in full screen. But I really don't know how to do this or where to edit the startup script so I can run it. I'm using ubuntu 10.04 server edition and only installed jre, fluxbox, and of course ssh-server.
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Jan 19, 2010
Java is installed in linux machine and when I enter the command java -version it shows java is not found.At the same time when i run from the folder where its installed with ./java -version it works.
first of all why its not working from any other place? also why do I need to give ./ from the folder?
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Aug 6, 2010
I have a some c source code files that i have to copy to linux machine from a windows machine over a network. This source code folder has to be copied into a particular directory structure in the linux system at the other end. After copying the file into the appropriate folder in the linux server i have to instruct the linux machine to make(using the make file that is there with the c files) this source code from the windows machine. Does anyone have any idea in regard to how this can be implemented?? i am trying to have a gui client that has the above mentioned options(copying and inserting the c files into the appropriate directory and then for making the files and getting the executable.)
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Apr 7, 2010
im searching for this answer now a pretty long time and i know that many similar questions where asked and i all looked themIm trying to run a the command "vncserver" on our opensuse11.2 server when its booted.many posts here endet in "put a sh script into your /kde4/Autostart" but that didtn help for me because the server runs without a screen and normally nobody is logged in. When i logged in that worked fine.i also tried to add the command "vncserver" to "/etc/init.d/boot.local " but that didnt work too. i think its to early executed to work.i also tried to activate the service to start up at boot with chkconfig vncserver start but the service vncserver is "unknown". when i type vncserver into the console after logging in everything is alright.you see i really tried a lot and searched a long time at google and in this forum but nothing worked
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Dec 17, 2010
I tried to execute a shell command by M-! cmd RET but it did not work.M-! does not turn up in the microbuffer no matter how many times I press Alt+!.But if I go to Tools menu and select Shell Command... option then it writes M-! to the microbuffer and everything works fine.What is the problem here?
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Mar 31, 2010
I want to fix my dns if I issue command service named restart it just wont execute the command all it say is connection refused error from rc.d just cannot figure out what the problem is my server is ruining on red hat Linux 9 which is also my proxy server.
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May 27, 2011
I'm trying to run an application from the command prompt. I've set the path in .bashrc. My executable file and all other files needed by it are saved in the same directory as the path. When I enter the executable name to run it, I get an error message saying that the command is not found.
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Oct 5, 2010
If I type this manually on the command line, it works
Quote:
ssh -Y user@machine 'firefox &'
I ssh into the remote machine as the named user and pop an instance of firefox from that machine back to my own. If I put the same thing into a shell script though, it fails.
Quote:
#!/bin/bash
ssh -Y user@machine 'firefox &'
I'm just left sitting at a command line on the remote machine. Why does the script fail and how can I make it work?
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Aug 20, 2010
I have the following command:ssh $USER@$HOST "ls /ops/pkg/ec/`grep "PKRTS" /ops/pkg/ec | awk '{print $1}'`* > /tmp/tmp_file"What the above SHOULD do..is, ssh to the host then execute the command.The command should first execute the grep and awk between the back ticks, and generate a file name, then ls using that filename* and write that data to a temp file.However, it executes the grep and awk before even SSH'ing and the command that goes to the server is simply an "ls /ops/pkg/ec/* > /tmp/tmp_file" since the grep and awk return nothing on the local machine.
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Feb 11, 2010
I wrote a shell script and tried to execute it in separate terminal using command 'gnome-terminal -e <script>'. When executing first time, it went fine.From second time, I am getting error 'There is error creating child process for this terminal' repeatedly.
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Nov 16, 2010
I have a php file that I need to execute via a cronjob. This file should be run by the www-data user as its a file in my /var/www/project folder. When I run this file under root (php -f cron.php) everything works perfectly, but I want it to run under the www-data to be safe. Before I run it vai crontab I tried it via command line as the www-data user and I receive errors:
Fatal Error: Allowed memory size of 8388608 bytes expired (tried to allocate 232 bytes).
But when I run it as the root user I get no errors and everything works correctly. The file cron.php is used to process automated tasks in my CRM. So I don't really want to have the root user running a crontab every few minutes for this.
Must the www-data user be given more permissions? I am using Ubuntu 6.06LTS
PHP - 5.1.2
Apache - 2.0.55
MySQL - 5.0.22
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Mar 28, 2011
I was just curious if cron had to be enabled before use. i have a crontab, and the cron daemon is running, but the command isn't executing...
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Jul 30, 2011
I want to execute a awk command, which reads from txt files and sums the numbers from the first column for those listed only inside a <init> block -- The awk command is like
Code:
awk '/</?init>/{x = !x}x{a++}x && a > 2{sum+=$1}END{printf"%E" "
", sum}
So, I want to execute it inside a perl script, and execute the awk command for the infile which is also defined outside awk loop, ie doing something like
Code:
foreach $infile (@ARGV) {
$gzin = gzopen($infile, "r") || die ("Couldn't open file $infile
");
# No. events and cross-section from current file
[code]....
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Jun 14, 2011
When i try to execute scp command:
scp -r /localhostdirectory username@remotehostservername:/remotehostdirectory
I get the following error
0509-036 Cannot load program /usr//bin/ssh because of the following errors:
0509-150 Dependent module /homepath/server/bin/libcrypto.a(libcrypto.so.0.9.8) could not be loaded.
0509-153 File /homepath/server/bin/libcrypto.a is not an archive or
the file could not be read properly.
0509-026 System error: Cannot run a file that does not have a valid format.
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Nov 13, 2009
I use a Dell inspiron 1525, with windows 7 and fedora 8 in dual boot. Ihave broadcom 4310 wireless card to use.. how ever i could not activate my wireless.. so i guess this the right place where i can get a solution to the problem. After installing the ndsiwrapper by yum, i tried to execute the command ndiswrapper -i bcmw15.inf This returns with an error couldn't open bcmw15.inf: No such file or directory at /usr/sbin/ndiswrapper line 219.
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Aug 23, 2010
I m using Redhat Linux 5......I am trying to install Nero 4 DVD Writer s/w...It is an exe file ...
I have given permission like this:
Then i execute the file like this:
Its showing error like this:
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Mar 3, 2011
Why is the timer not executing?
Code: #include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <signal.h>
#include <time.h>
#include <pthread.h>
void func(union sigval sv)
[Code]....
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Aug 3, 2011
I tried to install ndiswrapper , but its showing error,while executing make command
make[1]: Leaving directory `/usr/src/linux-source-2.6.35.8'
make: *** [LINUX] Error 2
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Oct 13, 2010
I am having the following error while executing script and initialing my application
./ss.sh: line 1: kk.sh: command not found
./ss.sh: line 2: mon.exe: command not found
Can somebody assist ASAP.
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Nov 2, 2010
I have an application, probably cpu-intensive because sometimes it leaves the cpu with 0% idle (in top). Sometimes it hangs ("Done" does not print) when executing this part, but most of the time it executes just fine. Is there any wrong with this code?
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Aug 25, 2010
I need a way to read and delete text found before a unique string, then delete the string. I would like to have the text stored in a variable--or better yet--executed it as a shell script directly.I intend to execute the stored text in bash. It does not matter much what language the program is it, however efficiency is desirable. This script is not going to be used on large files, but it may be executed many times sequentially so the faster the script works the better. Here is an example:
exclamation-"It worked!"
echo $exclamation
cd
[code]....
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Mar 20, 2010
what i did is created a file called pro3types but the script starts & by pass the file. i added +x to file ran the process but still no luck. i was wondering what else i should change to get the menu to the sub-categories of product3 after users selecting it. all I need to get the pro3types runs after users selecting product3 from the previous menu. need more info please see the thread: "Adding New Selections to the existing Script"
[URL]
but here is code:
Code:
#!/bin/sh
echo SELECTTYPE
export -n selecttypechoice
[code]....
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May 25, 2011
I am learning about OS and I wrote this simple forking program... Here's the code..
Code:
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
[Code].....
How can it print the first statement, that is BEFORE the fork() statement twice?
I am running Natty 11.04 btw..
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May 6, 2009
I am fairly new to linux still and I'm currently trying to write a shell script (which I have never done) that is supposed to run the xrestop(like top) program. What I want to do is execute the program and check the identifier column to see if a certain program is running. If it is running I want to strip the data from that row of the terminal say every 5 seconds or so and put it in a text file. Is this going to be a complicated thing?
Heres a list of the columns when you run xrestop program res-base Wins GCs Fnts Pxms Misc PxmMem Other Total PID Identifier.
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