So I was reading one of the Unix Philosophy rules by Eric Raymond:# Rule of Composition:Design programs to be connected to other programs.How does one achieve that? I know one could several C programs and then use a bash script to feed in the stdin, but how do you do that with just pure C, do you do it with pipelines?
View 2 RepliesDoes someone know how to create desktop shortcuts to programs (e.g to rdesktop) to all users on Ubuntu 10.04 ?Where (in which file) do I put the shortcut so it will appare (clickable) on the dekstop for all users logging into the machine
View 1 Replies View RelatedI made this thread last night~[URL]... Because my Ubuntu failed, and i have no idea why. I hadnt done anything different or risky.. and Ive no idea what to do. So, It appears Im going to have to do a re-install. Which, I really dont mind too much... (especially with Ubuntu) But It will stink if i *again* lose all my bookmarks , and lose track of all my installed programs. The programs, not as much of an issue as the bookmarks in my browser.. I would like to know, If I can somehow access the HDD from the LiveCD, So that I can create just a simple text list of all programs installed on the hdd? I cannot access my HDD except through the LiveCD So is there a way I can do this? Some kind of simple command I can toss into terminal, and have it output me a text file of all programs installed? or something? I really am totally clueless on how I would be able to save my chromium bookmarks.
View 9 Replies View RelatedI know that Linux is open source but there must be ways of creating non-open source programs to be run on a Linux system? Does such a thing exist and/or have a name? Would any source code that has been compiled be unable to be read by anyone properly unless the soruce code was released?
View 9 Replies View RelatedWant create script that run in background 5 programs from 5 given dirs and all of them should be in one controlling screen. In other words how via script after created screen and attaching to it via screen -r via script vreate new window within that screen, run given program and detach for new itaration
View 7 Replies View RelatedI would like to create a custom boot disk that would include some programs already installed on my computer, so I wouldn't have to re download them, is there a way to do this?
View 2 Replies View RelatedI have an NTFS file system nfs-automounted on our RedHat servers. Users can read and write to the file system no problem, and can create new files, edit them, and delete them to their heart's content. The only issue is that utilities such as "dos2unix" cannot create temporary working files:
$ dos2unix events.0818.dat
dos2unix: converting file events.0818.dat to UNIX format ...
Failed to open output temp file: Operation not permitted
dos2unix: problems converting file events.0818.dat
This isn't limited to "dos2unix"; any other utility that creates a temporary working file gets the same problem. If I copy the file to a local file system like /tmp, it works fine. Here's the kicker: this works fine on Solaris systems. I can take the "dos2unix" utility over to a Solaris system that has that exact same NTFS file system automounted via NFS, and it works. No issues creating temporary working files at all.
I'm having problems with programs connecting to the internet. I typed in
sudo apt-get install wine
and I get the following:
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package wine
I KNOW there is a package called wine but it cant find it. I can't install any other programs from programs either. My gDebi package manager is supposed to automatically download and install dependencies but it doesn't do that either.
I am sure I am connected to the internet as I can browse just fine.
I've got a Gateway laptop, running 10.10. It's running: Mobile 4 Series Chipset Integrated Graphics Controller
When I connect my HDMI, I can see my desktop wallpaper, but no icons, or programs. And I haven't even attempted sound yet.
How to fix this so that I can get video OR sound?
I've always thought that the idea was very cool, but I get restricted by the way distros think that "httpd" and the like are the only things that should go into a runlevel - I mean Fedora doesn't even let you turn off the GUI!I want to do some lower-level hacking than that, so can someone help me?
View 1 Replies View Relatedi have two c++ programs, first one captures network packet from eth interface and save it in a file, second one uses this generated file for its purposes, data stream always exists then first program should always be running, although second program cannot read the file while the first program is writing in it, then i need to define a lock which can be checked by both progs before read/write, how is it possible to define this kind of lock in linux?
View 5 Replies View Relatedwants to do miniproject as part of the academic curriculum using Computer graphics on Linux using C or C++. Can any one direct me to a direction how i can proceed. I know basics of C and C++
View 9 Replies View RelatedI know this may be just me being a little bias on OS's but... I quite honestly believe that "some" programs run faster on linux than on windows.
Open Office for example, It runs amazingly fast on my linux distro but runs horribly (laggy) on my Vista machine.
Firefox also appears to run faster on my linux machine than on my Vista machine.
There are several more examples but I could go on and on with this.
My point is, do programs run faster on linux than on windows? Or is it just me that is in denial?
I am not sure if comparing linux to Vista is a good comparison in terms of program speed or not...
Also it should be noted that the Vista machine "hardware" is "several" times faster than my linux machine's "hardware".
I am not trying to start a flame war or anything like that, I am just trying to make sure I haven't totally lost my mind.
I work on Fedora 9 and I'm unable to compile my c++ program using the make in the terminal as well as in the IDE-Anjuta.although 'make' works fine with C programs,I get an error that g++ command is not found whenever I try it with C++ programs.
View 3 Replies View RelatedI am working on a program called writemusic that creates a file of structures representing musical glyphs (notes, rests, barlines, etc). Another program called Printmusic then reads this file and writes out the music as a PNG image which can be printed. I had noticed that the final barline was always duplicated and I wanted to know which program was resonsible, so I tried some experiments:
1). I created a file in writemusic and ran it through printmusic, leaving writemusic running. As I expected there were two barlines at the end. I went back to writemusic and added a couple of bars. Now the duplicate barline had vanished to reappear at the new end.
2) I created two files and concatenated them with cat. When I processed this composite file with printmusic each of the two sections ended with a double barline.
3) I created a file with writemusic, closed the program, relaunched it and reloaded the same file (writemusic allows you to do this). Then I added a few bars. When printmusic had processed this augmented file, there were three barlines at the end of the first section and two at the end of the second.
The results for 2) and 3) only make sense if writemusic is actually putting these duplicates into the file, but the result for 1) suggests that printmusic is doing it when the file is read back.
I ran into an inconsistency in handling timers (VTALRM) between AMD and intel platforms with threads. My understanding was that the timers are per process. I discovered I must call setitimer in the thread on intel though. AMD allows me to make the setitimer call once in the main thread as expected. The code below demonstrates the issue. I must add the code in the INTEL define for it to work properly on intel cpu's. Am I missing something dumb??
[Code]...
Well I have been interested in programming for a while, and just found out about Linux and Unix. I started out with Java, but now I know I bunch: Flash, C++, C and others. I was working on a mac so I made a few flash games then started to work on iPhone games. I was board one day and I found out about Unix and I thought that would be something else to try.So in an attempt to learn about Unix I have been reading different articles about it, and have heard of using different languages in one program. The article I was reading didn't give any examples, and it assumed the reader has programmed Unix before.
So how do you write programs in multiple languages, which languages would you use, and why would you want to do that?
A thread-aware version of gdb receives a system notification when a thread starts in the app it is debugging. GTK+ has hidden threads associated with loading icons into menus. So trying to debug a GTK+ program, even one that is apparently single-threaded, can produce a deadlock between gdb, the app and XWindows. The app (actually GdkPixbufLoader) grabs the focus, the mouse and the keyboard and then starts a thread when a menu is opened. If gdb has trouble with threads, it leaves the app blocked but still holding the mouse, et. al. Then you can't talk to gdb or any other GUI interface. To make gdb happy, all GTK+ apps need to be linked with -pthread, if you have the source. If not, gdb cannot be used. In order to break the deadlock, you need a non-GUI shell. If your /etc/inittab starts agetty, mingetty, or the like, and you can get to it with <CRTL><ALT><F3...F6>, you can do a kill -KILL <pid> on the offending app, recover and then go back to XWindows with <CTRL><ALT> <F1/F2>. Otherwise it's reboot time.
View 3 Replies View Relatedi am trying to do something very simple like a header and a footer for my first perl programs, what iam trying to do is that when i create a file in vim: lets say hello.pl , i would like that file to have already this in its header:
#!/usr/bin/perl
and this on the footer:
print "
";
so that i dont have to type everytime #!/usr etc i tried to do it this way but i get weird vim errors: header is a file that contains the header and footer $ vim hello.pl;header > is there another way to do it as a function in bash or some other one liner command?
I'm new to database programming but I'm working in a project that makes use of sqlite3. I know I should #include <sqlite3.h> but it is not there.... i have just sqlite.h. can anyone tell me what to do to have the sqlite3 headers and start using them in my programs
View 9 Replies View RelatedI would like to know the Tools which are used for Testing the performance of C and C++ programs under linux?
View 4 Replies View RelatedI am trying to replicate what is happening on this page under the tcsh shell, but using the bash shell found in Wheezy. Here is the page I am referring to:[URL] The command I am trying to replicate is on page 6 under figure 2.4. The command is "prompt> ./mem &; ./mem &".
I would like to run the same program twice, concurrently, but do not know how. Note that I am not trying to use a bash script, but rather by simply using syntax on the command line.
I was wondering about a package that can be used to write and compile/run programs in different programming languages. I was also wondering how possible it is to program in Visual Basic 2010 in openSUSE if at all.
View 9 Replies View RelatedI have list of programs which I have created during the past few days, all the programs are attached in txt files, and if anyone can do favor, and double check if they work, and what changes I can make to make it look different, or to improve it.
View 9 Replies View RelatedI am not sure if that Subject really explains it, basically I have a script that executes a CLI java-applet that requires a passphrase from the user. I can easily execute this by issuing the -p argument followed by the passphrase however that shows up on possible logs or at least on the results of the ' ps ' command. If you do not supply this -p argument it provides a new line with the echo " Enter Passphrase: " and asks for input.
how can I provide a result/input for the Passphrase request and is it still possible to throw this application in the background with the ' & ' following the command? I have seen a few examples that show a /bin/expect that expects a result and sends a command however I would like to refrain from any extra dependencies. Example of Regular Execution of application:
Code:
$ /usr/local/***/**** -u USERNAME -r Default-Realm -f certificate.der
Password:
I tried a little C programming, and got a bunch of segmentation fault the first few tries. But from what I understand, the whole purpose of segmentation faults is the protect other programs from the damaging effects of my program. Yet, if I trigger a segfault enough times, weird things happen to my other running programs. I usually run a console inside Kate, and after 10 or so segfaults, Kate sometimes freezes or randomly highlights text, etc. just random behavior. Also, my desktop will occasionally hang and things will start failing, like copying files and such. I have to log out to restore everything to normal, but logging out is difficult since the logout prompt freezes. I have never experienced such behavior before I began programming, my system has been relatively stable. I run my program from inside Kate's console, so I was wondering if all KDE applications share memory or something, because this has happened once or twice, and only when I trigger a segfault many times.
View 4 Replies View RelatedIs it possible with minimal modification?
View 3 Replies View RelatedDo you know how to write programs that use electronic signatures in JAVA (although I am not pretentious about the language in any way).
When I say e-signatures I mean those USB smart cards(security tokens) that are capable of doing encryption by themselves and store securely the private key. I am particularly interested in how authentication works with a digital signature, how to sign data, and most importantly how to check that a digital certificate is valid. What do I need to store in the Database for authentication for example -- is it the serial or the Hash?
Do you know how to write a shell script that executes say 4 instances of the same program in different directories at the same time, and once ONE instance completes it executes a new instance of that program in a new directoryd so on, until 100 instances have been executed, each in their own directory
View 5 Replies View RelatedGenerating avi files for movies directly from gfortran programs. I make movies from my Fortran codes using seismic unix - SU. Need to modernize this method to make avi movies or something similar. I am quite adept at generating "C" binary files from Fortran. Have not been able to find the documented definition of AVI file format.
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