Linux

What is the main advantage of creating links to a file instead of copies of the file?A: The main advantage is not really that it saves disk space (though it does that too),Rather, that a change of perpermissions on the file is applied to all the

If there are not many developers involved, JDK is indispensable. Now I will record the configuration party to facilitate future use. First download the JDK package and configure the environment variables. Computer properties, add the

Install JDK in Linux as follows: Step 1: Check whether the built-in JDK of Linux is installed (1) Check the installed JDK: # Java-version Step 2: Install JDK download from sun Jdk1.6.0 _ 29-linux-i586-rpm.bin orjdk1.6.0_29-linux-i586.binCreate a

I want to begin to read the Linux source code carefully, first from the simplest Linux-0.11. I will repost an article below to encourage myself. Http://www.51testing.com/html/11/n-817111.html How to read Linux source code With the gradual

With the rapid development of the Internet and the maturity of Linux enterprise applications, Linux is widely used in the server field. How to implement remote management of Linux becomes the primary task of network administrators. We often see

Linux kernel essence: 75 skills required to be proficient in Linux Kernel The kernel is the core of the operating system. The basic functions of the operating system are provided by the kernel. File generation and data packet transmission are also

For the IA64 architecture, in Linux operating systems, especially for multi-CPU Systems with SMP or NUMA architectures, when describing the private data of each CPU, the Linux operating system provides the per_cpu mechanism. The per_cpu mechanism

This article is published in the Linux format magazine. The author explains in depth how Linux kernel works. I believe it will be of great help to Linux developers.   The definition of the word "kernel" in the Oxford dictionary is: "A soft, usually

You can install VMWare on a virtual machine and in windows. Then, you will know about it in Baidu; I directly installed Ubuntu 12.04 with a USB flash drive. After using Ubuntu for a long time, I felt better than windows. I haven't used windows for

KernelThe link compilation process relies on the vmlinux. LDS file ArmFor example, the vmlinux. LDS file is located in the kernel/ARCH/ARM/vmlinux. LDS, The vmlinux-armv.lds is generated in the kernel/ARCH/ARM/makefile Ifeq ($ (config_cpu_32),

So far, we have been engaged in QNX, RTLinux, uC/OS-II, Nucleus PLUS, vrtx, VxWorks, and ECOs, which have the following features:ECos: multi-task preemption mechanism, configurable (special), configurable File System uC/OS: few code, multi-task

  1. Compile the header file and source file of the library. 2. compile all involved source files as the target file in the following way:# G ++/GCC-g-C-FPIC-O library1.o library1.cpp# G ++/GCC-g-C-FPIC-O library2.o library2.cpp#......# 3. link all

There are many methods for inter-process communication in Linux, such as "Pipeline", "signal", "Shared Memory", "message queue", and "socket. However, I personally prefer "message queue ". Message queues and pipelines have at least the following

When I first started to contact Linux, I always had some simple problems and did not know how to solve them. I first called "Linux entry-1" as a summary.   1.Connect to ADSL: sudo Pon DSL-provider Disconnect ADSL: sudo poff View ADSL status: plog 2.

Shell: Bash. I use Bash's VI command line method. Editor: vim, emacs Program Development: GCC, GDB, make, LD, scheme48, j2sdk, Perl, Python, Tcl/tk... Thesis, magic lamp tool: latex, Context Drawing tool: metapost. This language is so powerful that

Build one of the basic Linux frameworks Building a Linux by yourself can not only deepen your understanding of Linux, but also help you learn embedded Linux. The process of building a Linux (kernel compilation, file system creation, graphical

Build your own Linux 2 busybox Port   Busybox is a software that integrates more than one hundred common Linux commands and tools. It even integrates an HTTP server and a Telnet server, all these functions only have a size of about 1 MB. the Linux

Linux driver framework. I. Linux Device Drivers and external interfaces can be divided into three parts:: 1. interfaces between the driver and the operating system kernel. This is done through the file_operations (include/Linux/fs. h) data structure.

Build your own Linux 3 Preliminary improvement (providing network functions) 1 add profile file # Ash profile # VIM: syntax = sh # No core files by default # ulimit-s-c 0>/dev/null 2> & 1 # user = "'id-UN'" // not supported yet user Login function,

  Gpio (generalpurpose input/output) is the chip pin, and the pin is programmable to set the working mode of the pin: input mode (detect the input signal ), output Mode (output 0 or 1), high-impedance (usually used in the adswitch), and prohibit or