What are the main benefits of using Mono over Java (or any other "free" or Linux-friendly language/runtime)? Mono will always trail behind the latest developments in the .NET framework, why would you want to use Mono over another traditional open-source language/framework (Java)? EDIT: Like someone mentioned below, I guess the root que...
I'm connecting a socket asynchronously (O_NONBLOCK + connect). POSIX standard specifies that after socket has been connected is should signal the event by making the file descriptor for the socket ready for writing. It doesn't seem to say anything about failures during async connect. When testing it on Linux, it seems that sometimes I'm...
According to wikipedia ( http://en.wikipedia.org/wiki/Fork_bomb ), the forkbomb ":(){ :|:& };:" can be stopped with the zsh command "while (sleep 100 &!) do; done", which will supposedly spawn sleep 100 processes until all the forkbomb processes are gone. This seems like magic to me. Can anybody explain why/how this works? I'm especia...
I'm currently in the process of learning assembly language. I'm using Gas on Linux Mint (32-bit). Using this book: Programming from the Ground Up. The machine I'm using has an AMD Turion 64 bit processor, but I'm limited to 2 GB of RAM. I'm thinking of upgrading my Linux installation to the 64-bit version of Linux Mint, but I'm worried ...
Hi! We're trying to read data from 2 usb mice connected to a linux box (this data is used for odometry/localization on a robot). So we need to continuously read from each mouse how much it moved. The problem is that when a mouse is not moving, it doesn't send any data, so the file stream from which we get the data blocks execution and t...
Looking for information regarding the advantages and disadvantages of both fcntl and lockf for file locking. For example which is better to use for portability? I am currently coding a linux daemon and wondering which is better suited to use for enforcing mutual exclusion. ...
The command-line can be powerful but it can also be risky, which is why it is never recommended to login as root for your day-to-day work. Sometimes the command line can catch you out if you're not careful. So for example rm -rf . /dir instead of rm -rf ./dir can have a completely different result to what you intended. Here is a great c...
In linux kernel, mem_map is the array which holds all "struct page" descriptors. Those pages includes the 128MiB memory in lowmem for dynamically mapping highmem. Since the lowmem size is 1GiB, so the mem_map array has only 1GiB/4KiB＝256KiB entries. If each entry size is 32 byte, then the mem_map memory size = 8MiB. But if we could use...
Which Linux Certification would you best recommend? LPI, Novell or Redhat ...
Hello, I have a c++ class and I am trying to run it in ubuntu: #ifndef WRONGPARAMETEREXCEPTION_H_ #define WRONGPARAMETEREXCEPTION_H_ #include <iostream> #include <exception> #include <string> using namespace std; #pragma once class WrongParameterException: public exception { public: WrongParameterException(char...
In Unix all disks are exposed as paths in the main filesystem, so os.walk('/') would traverse, for example, /media/cdrom as well as the primary hard disk, and that is undesirable for some applications. How do I get an os.walk that stays on a single device? Related: Is there a way to determine if a subdirectory is in the same filesyst...
Hello I am looking to install Apache-Tomcat on a RedHat linux and I am interested if there is a standard place for this to be installed. in other work I have seen tomcat installed at /opt/apache-tomcat-[VERSION]/ but I would expect it to be found under /usr. Best answer will have a link to authoritative site. Thanks so much, David. ...
Is there a way to tell Linux that it shouldn't swap out a particular processes' memory to disk? Its a Java app, so ideally I'm hoping for a way to do this from the command line. I'm aware that you can set the global swappiness to 0, but is this wise? ...
I am redirecting the g++ compiler output(both stderr and stdout) to a file on linux. But it is creating an empty file. I read in some other post that stdout is not flushed after every line. Thats ok, but what about stderr. In my case there are compilation errors running several screens. So, I am interested in stderr output. There is no ...
I have a Fedora 10 64-bit server where I want to set up a nightly fresh install. The server is an exact clone of our customer's hardware and is used for running acceptance tests. I would have liked to set this up using a virtual machine, but that's prohibited due to problems we've had with the different video and network drivers on t...
Is there a way to detect IP address changes on the local machine in Linux programmatically using C++? ...
I was just wondering who knows what programming languages Windows, Mac OS X and Linux are made up from and what languages are used for each part of the OS (ie: Kernel, plug-in architecture, GUI components, etc). I assume that there are multiple languages for each and obviously I know the Linux kernel is written in C. I'm totally guessi...
My friend has allowed me to have access to his server, he has been coding PHP a lot longer than me and still uses php version 4.3.9 and doesn't want to upgrade this current version. Is there anyway for me to install php version 5.2 and use that while he still runs 4.3.9? I require some functions which are only available in 5.2. The serve...
I wrote this program in C++ and on Linux platform. I wrote a client and server socket program. In that client program, I wrote socket function and immediately after that I am doing some other actions not at all depending on socket (I wrote 2 for loops for some other logic). After that I prepared the structures required for the socket ...
I have a bunch of long-running scripts and applications that are storing output results in a directory shared amongst a few users. I would like a way to make sure that every file and directory created under this shared directory automatically had u=rwxg=rwxo=r permissions. I know that I could use umask 006 at the head off my various scr...