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
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Code: cmd='date | wc'
$cmd If this script is executed, an error is generated. The reason written was that "The execution fails because the pipe is not expanded and is passed to date as an argument".What is meant by expansion of pipe. When we execute date | wc on the command line, it goes fine.then | is not treated as an argument. Why?
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
View 4 Replies View RelatedI 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.
View 4 Replies View RelatedI need to know if there are better burning utilities , I am using the default Brasero with many writing errors
View 2 Replies View RelatedI've been running Lenny for quite a while and have always been plagued by strange CD writing/erasing errors in K3B. I also tried erasing my CDRWs using wodim from the command prompt but had erratic results there also. I was researching these problems on Google recently and finally found a solution as well as an explanation of the cause of all the difficulties. Go here [URL], do some reading and then download/install cdrtools-3.00 from the link on the main page. The package did all the work for me including updating the default programs in K3B - now everything works as it should. I sincerely hope Debian will reconsider the trouble-prone fork of the original cdrecord (wodim) and make Jorg Schilling's excellent cdrecord the package of choice for future releases of Debian.
View 14 Replies View RelatedI always wanted to get into writing open source applications for debian. The only problem I ever saw was that I do not know C++ which seems to be the popular language to build applications. My expertise is Java and I think that java applications could run on debian just as good as C++ applications. What I do at work is write applications in java for unix systems so I think I porting my skills over to debian would not be a problem. I have not seen any applications in java on debian yet and thought people might have a problem with them. Is there any reason more java applications are not being written on debian? Also does anyone know of hand if there is any orphaned java application for debian. I had a look on this page but it is hard to know what language the application is written in. [URL]
View 5 Replies View Relatedhow we can we write java programs in java and how we execute it.. to produce output?
View 2 Replies View RelatedJava 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?
I am running Valgrind on my program. It shows me two errors but mentions only addresses against them and not actual code even on a debug build.
The output is
==23002== Memcheck, a memory error detector.
==23002== Copyright (C) 2002-2005, and GNU GPL'd, by Julian Seward et al.
==23002== Using LibVEX rev 1575, a library for dynamic binary translation.
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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?
Recently, I've been tasked with a bit of db stuff that uses a vpn and java client (I don't think I can talk too much about it). The java client runs fine over the ciscovpn connection on an xp machine, however my problem is running it on Linux: the application successfully connects to the server over vpn to download the application, however it then throws an error about RMI being unable to connect later, and to check if the RmiServer is running...
I don't know too much about the application, other than its made by UC4 (Intelligent Service Automation), however if the following stack trace is helpfull:
Code:
java.net.SocketException: Network is unreachable
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
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I was just wondering is 2.5mb a second normal to write to a usb2 pendrive with the 'dd' command?
I know dd maybe having an influence on writing time, but it still seems really low for usb2 transfer?
Is there a command to measure the time a file takes to transfer from HD to usb pen? (not using dd).
I'm trying to write a 100MB file for example all with 0xFF so in the hex editor it should look like "FF FF FF FF FF FF" etc. I know you can write a 0x00 with this line:
Code:
dd if=/dev/zero of=myfile bs=1M count=100
But how to do 0xFF or another character?
I want to use the 'dd' command because with the 'bs=1M' argument it is 100 times faster than any other shell command I've seen.
Currently we are using Unix machine & the activity are logged in the file using following code used in profile
.profile code
# /ln/aud_root/dds_ibm/.profile
trap 'print "not allowed"' INT
trap 'print "not allowed"' QUIT
trap 'print "not allowed"' TSTP
[Code].....
how to write a command (for loop) that would ping a Class C subnet to make it so that it only replies once and does not show the statistics?
View 2 Replies View RelatedI am going to write a TCP server program using c. Can anyone give me some advices on whats and what not to do specially when using select?
There would be a lot of data to be transferred both on the server and back to the client. I already have a simple server here but the server uses a lot of resources. Maybe 3 to 4 connections and the server's load would rise to unacceptable levels.
Which do you think is better to use fork or select?
I want to write some PHP for a website that'll have the data that the script will generate written inside a table with thin black line around it, much like LQ itself. My problem is: how do I draw the box that the text will be inside of, since the amount of text will vary - if I have a GIF with a picture of a box, that'll be of a fixed length, and my script can then only generate that much text, for it to look nice. Or do I need to fiddle with the GD library to get done what I want?
View 4 Replies View RelatedSo basically, there is a really cool writing system I have been working on. It could be viewed (for simplification purposes) like an encryption method for the Latin script.
Facts about the writing system:
It has a little over 300 symbols.
It is syllable-driven.
It is highly compositional (eg. "c", "ca", "cae", "ca " and "ci." all map to different symbols - and NOT by overlaying elements)
Symbols have medium graphical complexity (comparable to Korean Hangul, or Japanese Hiragana)
Has a rather complex set of diacritics (~10, some of which can go on any symbol)
Has no ligatures
How transliteration occurs:
Sequences of Latin symbols map to certain symbols. Example below:[G][rou][p ][hu][g.]Characters sequences between "[" and "]" map to a single symbol (so it would take only 5 symbols to write "Group hug.").
How I want it to work:
I would like to have a daemon that: Intercepts all text displayed on the screen.
Converts it to my writing system (changes letter sequences with individual Unicode codes)
Leaves unsupported symbols unchanged.
Displays all the text on the screen using my font and characters intertwined with the fonts and characters left unchanged.
For example, if you take the following line of C++ code:for (i = 1; i <= n; i++)
I would like it displayed like this:[fo][r ]([i ]= [1]; [i ]<= [n]; [i]++)
Bold-symbols should be in my Unicode font with special symbols defined for this writing system, and the rest should be in its original font and encoding. Also, I would like this encoding to hold for display-purposes only. The data in the memory should remain unaffected. This also means real-time adjustments: if I open a text editor (say, from the OpenOffice Suite) and I start typing, I would like to see what I type encoded with my writing system, even though the document actually contains Latin letters. This also means that the symbol immediately before the cursor may change as you type.
I have written a daemon server. I would like to add the ability for the daemon to update itself. That is, it should be able to download the latest version of the code (when it receives a signal from a client) and then restart itself. I am stuck on getting the daemon to restart itself. The problem is killing the old daemon without killing the process that is starting the new daemon. In my latest attempt, the daemon that is updating itself runs a program in a subshell (using system) that starts a restarter daemon that runs the original daemon (again using system) with the restart command option. With the restart option, the new version of the daemon sends a terminate signal to the old version. Obviously, when I run the original daemon manually with the restart option, it restarts reliably. I figured that issuing the same restart command from a daemon would adequately isolate the process doing the restarting from the program being restarted. Using ps, I can see that the daemon does actually restart. However, the client locks. In fact, a few times, the OS locked and I had to reset.
View 7 Replies View RelatedHow to write a mkdir with -p option. I am struggling for creating subfolders. the chdir() is not working and thus subdirectories can't be created.
Code:
I'm not able to write to a file using my perl cgi script which is as fallows:
Code:
#!/usr/bin/perl -w
use strict;
print "Content-type: text/html
[Code]....
I am trying to write .pgm images using the O_DIRECT flag in open().I have a char* buffer which has the image data. I know that I have to align the buffers and have done that using posix_memalign() yet only a part of the image gets written.Has someone used O_DIRECT for writing files successfully?
View 1 Replies View RelatedI'm trying to write a simple, console based application in linux, in c++. I know how to start in Eclipse and I have some experience in c++ from Windoze. I would like to ask, if there is some tutorial available on writing console apps. I mean, I know from using linux that there are two conventions on using parameters in command line (-v and --version for example).
View 2 Replies View RelatedMy platform is linux Centos 5. I have read that to learn programming is to read well-written code and take some project to work with. I am always fascinated by routers and firewalls. Like pfsense and vyatta. May be my searching skills are worst but i am not able to find any good tutorials. Ofcourse i dont expect anyone to write a complete router on their blog but wasnt even close to it.
View 1 Replies View RelatedCode:
int main ()
{
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I have assignment to write bash script and I have to submit it after tommorow . I do not have experience to finish it by myself.I am really need help if any one can contact me. on my email I will be thanks him/ her.
View 14 Replies View RelatedReading and writing text files in C?
View 9 Replies View RelatedI would like to write a program that can read every ethernet frame arriving on a specific hardware NIC, without a TCP/IP stack otherwise doing anything on that NIC. Likewise I want to be able to write out to that NIC. So every arriving ethernet frame, of all types, would be readable (probably one at a time to preserve frame boundaries). And every write of exactly that same data would send frames out. The data read and written would be the whole ethernet frame. The kernel would do nothing else with this data, but other NICs would still operate as usual.
What I would be doing is that on 2 separate NICs, copying frames from one to the other, as in bridging. But I would also be doing modifications per what my program needs to do (not at liberty to say what that would be). What facility would I need to be looking at to do this? There is no ethernet device file. Would raw sockets be able to do this? The programming language will be C.
I created a small C++ program which starts a server in a separate thread and waits the user to press q using the standard input/output. Something like:
Code:
printf(...);
server->Start();
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