I'm just a student and I'm learning ShellScript in my college. In college lab, our ma'am just asked to enter and IP in PUTTY and launch it, open vi editor and do programming. How do I do it at home? I run XP on my computer. I tried asking her, but God bless her, she doesn't even know the syntax of if ... else and she came to teach us. ...
Hello. I'm porting a small C++ console application from windows to linux, GCC 4.3.2. When compiling I get strange error that I'm unable to solve. Labels.cpp: In function ‘void DumpSymbols()’: Labels.cpp:68: error: invalid conversion from ‘int’ to ‘std::_Ios_Openmode’ Labels.cpp:68: error: initializing argument 2 of ‘std::basic_ofstrea...
I am making a C++ program. One of my biggest annoyances with C++ is its supposed platform independence. You all probably know that it is pretty much impossible to compile a Linux C++ program in Windows and a Windows one to Linux without a deluge of cryptic errors and platform specific include files. Of course you can always switch to ...
I'm writing a web-server in Python as a hobby project. The code is targeted at *NIX machines. I'm new to developing on Linux and even newer to Python itself. I am worried about people breaking out of the folder that I'm using to serve up the web-site. The most obvious way to do this is to filter requests for documents like /../../etc/pa...
Hello, I need to write a simple program: There will be a Parent and a few programs [children] (started via execl in Parent). Children communicate to one another in this way: Child I sens to Parent number J, Parent sends a message (something like -- "there is a message to you") to J, J send to Parent number K etc. etc. And there is a pr...
ok, so I finally got a Macbook pro and to tell the truth I am astonished by both the architecture, speed, and os on this laptop. Mac OS X is a beautiful system, from the mach kernel up to finder and spotlight and speaking of spotlight, it truly blew me away when I just needed to execute this command to get all unix executables and ONLY ...
$ apropos mkfifo mkfifo (1) - make FIFOs (named pipes) mkfifo (1posix) - make FIFO special files mkfifo (3) - make a FIFO special file (a named pipe) mkfifo (3posix) - make a FIFO special file mkfifoat (3) - make a FIFO (named pipe) relative to a directory file ... So I have man pages for Linux Pro...
1) I am in some directory 2) I want to find out how much free space is left there Is there a simple command that does this? I don't want to look in fstab or whatever, having to map the devices & mount points in my mind in order to determine how much free space I have left. ...
We have a number of embedded systems requiring r/w access to the filesystem which resides on flash storage with block device emulation. Our oldest platform runs on compact flash and these systems have been in use for over 3 years without a single fsck being run during bootup and so far we have no failures attributed to the filesystem or ...
Under Linux, how do I find out which process is using the swap space more? Any scripts/links appreciated.. ...
I have a logger system which basically is a fancy way of writing my data to std::clog in a thread safe way. I also, redirect std::clog to a file like this: int main() { std::ofstream logfile(config::logname, std::ios::app); std::streambuf *const old_buffer = std::clog.rdbuf(logfile.rdbuf()); // .. the guts of the applicat...
Program is part of the Xenomai test suite, cross-compiled from Linux PC into Linux+Xenomai ARM toolchain. # echo $LD_LIBRARY_PATH /lib ...
Hi, I would like to discover the machine architecture type of a big number of machines. I have the hostname of each machine. The machines have Debian 4 linux, SunOS 9, SunOS 10 or Apple Darwin. All are unix-like, but with minor differences. I would like to know: - architecture (x86, x86_64, ia64, sparc, powerpc...) - processor type (in...
Is there a way for a Java GUI application to respond to system shutdown or logoff events, other than to use JNI? (On Windows, the JNI would use WM_QUERYENDSESSION, on Linux?) The method should allow the program to prompt users to save, etc., and then continue the logoff process. ...
On linux, I am opening a pseudo tty on the master side. While there is no client on the slave side, the pseudo tty seems to be echoing everything I am writing to him, which is not what I am expecting. Consider the folowing code : int main(int argc, char * argv[]) { int ptyfd; int rc; /* return code */ char readbuf[3]; ...
On my Ubuntu linux box I can easily mount USB connected drives or CDROM clicking on devices icons that I can found on the Desktop. For example if I click on a USB connected drive icon the following things happen: a /media/LABEL directory is automatically created (where LABEL is the label of the disk and may vary from disk to disk) the...
I'm writing a new daemon, which will be hosted on Debian Linux. I've found that /var/log has root only write permissions, so my daemon cannot write log files there. However, if it writes there, it appears it will gain automatic log rotation, and also work as a user might expect. What is the recommended way for a daemon to write log en...
I'm trying to compile the following simple DL library example code from Program-Library-HOWTO with g++. This is just an example so I can learn how to use and write shared libraries. The real code for the library I'm developing will be written in C++. #include <stdlib.h> #include <stdio.h> #include <dlfcn.h> int main(int argc, char **...
I have a simple scenario, where two servers are connected through a gigabit link. I run iperf on both sides to measure the throughput. What surprises me, whenever I run the traffic bidirectionally, it always favor one side only (eg. ~900Mbps vs. ~100Mbps). If I run the traffic unidirectional, each side got ~900Mbps. If I connect one of...
I've noticed that a OpenGL app I've been working on has significant performance difference when run on Linux vs WindowsXP. Granted, there are a lot of textures and shadow buffers but I would estimate that the app runs about 10x slower on Windows XP. Any ideas? Any suggestions for porting the code to DirectX? Can that be done easily...