Shared libraries are used to provide functions to the commands and executable of the Linux. ldd command can be used to list currently used shared libraries of given executable file. Help Even ldd command is a simple command which provide some parameters this can be listed with the –help option...
As programmers we generally use malloc() , free() and similar functions in order to allocate memory. They are provided by glibc() library. The actual work is done by mmap() and munmap()which is a Linux systemcall. What Does mmap() Function? mmap() function or system call will create a mapping in the virtual meory of the current...
gcc is very popular compiler in Linux world. gcc provides interpreter and compiler for programming languages like C, C++, Java etc. In this tutorial we will examine popular compiler options like error, pre-processor, output, optimization etc. Example C Application Code During this tutorial we will use following simple example code. As we...
Linux is a Operating System kernel and user space applications will create different distributions like CentOS, Ubuntu, Mint, Kali around this kernel. Kernel can be downloaded freely and used without any license fee. In this tutorial we will learn how to download Linux Kernel from kernel.org and compiling with GCC...
gdb is the short form of GNU Debugger. Debugger is a tool used to search and find and get detailed information about bugs in applications binaries. gdb is popular in Linux community which is used by most of the IDE, Programming tools event in Android IDE’s. In this tutorial we will look...
Binaries are created by building or compiling source like C, C++ etc. In simple applications we can build by using the compiler like gcc directly. But this is inconvenient if the application is big and have a lot of source code, configuration file and build options. Developers generally prefers build...
As a systems administrator I generally use package managers to install software. But in some situations I can not use package manager because provided software version is old or do not compatible. In this situations how can I install new software from source code by compiling. Software source code can...
[rps-include post=6557] Now we are here in start point. We will write a simple application which is generally a Hello World. This is very important because writing, compiling, running a C application is very important for beginners. Hello World Now our code is below. I have written this code very...
Cygwin is free software to provide Linux and Unix environment, tools and libraries in Windows operating systems. Cygwin is also called an emulator because it translates Linux system calls into Windows type systems calls. Cygwin generally used to run Linux tools like ssh,scp,bash, X11,gcc in Windows environment. Cygwin support following...
Linux applications, tools, services uses libraries to get necessary functionalities. Libraries provides a lot of functionality to the related applications, tools and services. One library can be used by different applications. This is called dynamic library using or loading. Shared Libraries Shared libraries reside in /lib , /lib64 and /usr/lib . Each library...
