Linux

When we use VMware virtualization software, we often find that they can all Virtualize a nic, which seems amazing. In fact, in Linux, there are two kinds of virtual backup, point-to-Point device in Tun. Tap indicates an Ethernet device. It is used

Job: a process or a group of processes associated with pipelines/redirection. Foreground: The environment in which the client session interacts with you. Background: The environment that does not interact with you, but is related to the current

In the previous article "ok6410 matrix keyboard driver linux2.6.36" http://blog.csdn.net/sun_rise2011/article/details/7626818 has been given in detail the custom matrix keyboard driver, mainly from the kernel separation, as a separate driver module,

1. symptom description On the surface, the man-machine program crashes and all functions cannot work properly. This problem has appeared many times. It took a week to understand it. Later, we summarized the tracking process and analysis and provided

The first two sections of this series discuss clock sources for timing: clocksource and some representation of kernel internal time, but for real users, we perceive the real time of the real world, that is, the so-called wall time. clocksource can

Reprinted: http://blog.csdn.net/sunmenggmail/article/details/7888746   A large application system usually requires collaboration among many processes. The importance of communication between processes (see Linux Process Concept 1) is obvious. This

In Linux Redhat 5.4, the recovery process for RM accidental deletion of database files is as follows:(Found online, tested OK)1. First, test RM's accidental deletion of database files. [Oracle @ primary dbwdn] $ LLTotal 2153164-RW-r ----- 1 Oracle

Generally, if the header file of the library is not in the/usr/include directory, you must use the-I parameter to specify the path during compilation. Because the same library may be located in different directories on different systems, users can

1: Due to work, I have been engaged in the development of 2 * 36port Expander in LSI for the past few months. It mainly parses and processes the SSP, SMP, and SES command protocols in SAS. The SDK of LSI uses the threadx operating system. The kernel

Question: Today I saw an article about viewing CPU and operating system information. I will share it with you, O (CPU _ memory) O!   Understanding CPU architecture Http://blog.csdn.net/wyzxg/archive/2009/12/17/5027738.aspx I briefly summarized the

Environment: Ubuntu 13.04 Student ID: SA * 310Update Kernel The kernel version of the directly installed system is generally not the latest. uname -a Command to view the kernel version number, for example, my is: Next, manually update the kernel

Linux can always implement a complex function in the simplest way, especially in terms of NetworkEven if this function is considered to be available only on high-end devices, Linux can easily implement it. The previous articles have already said

U-boot passes many parameters to Linux kernel, such as serial port, ram, and videofb. Linux Kernel also reads and processes these parameters. The two parameters are passed through the struct tag. U-boot stores the objects to be passed to the kernel

In struct bus_type, two linked lists are prepared for devices and drivers. The struct device represents two members, struct bus_type * bus and struct device_driver * driver. Similarly, the struct device_driver that represents the driver also has two

To add a system call, follow these steps:1. Add your system call entry to the system call table sys_call_table of the kernel. Select the file to be modified based on the number of kernel bits (32/64 bits:ARCH/MIPS/kernel/scall32-o32.S ------> 32bit

The system calls MMAP () to map a common file to implement shared memory. System V maps files in the SHM of a special file system to implement shared memory communication between processes.That is to say, each shared memory area corresponds to a

LinuxLowerVPNClient (p t p) Configuration Linux: Kernel kernel-2.6.9-42.EL You can go to the site: http: // pptpclient.sourceforge.net/ Required software: Kernel-devel-2.6.9-42.EL (built-in system) Dkms-2.0.10-2.fc5.noarch.rpm Dernel_ppp_mppe-0.0.5-

First, the real-time machine of Linux is analyzed. Then, based on the characteristics of multimedia applications, the embedded Linux System for multimedia applications is constructed by improving the real-time performance of Linux systems.

This series of articles is divided into two parts. Part 1 describes the concept of real-time and the metrics for measuring real-time performance. It analyzes in detail the requirements of embedded systems for Linux real-time performance and the

Document directory CPU Introduction Bus and Interface) I/O Storage Network System Monitoring These days, the progress is slow and reading is a bit boring. Let's start with Chapter 3: hardware support. I have read the CHM of the first