Linux

During the development process, we often find that the virtual machine's hard disk is not enough. In this case, we need to expand the hard disk for the virtual machine. You can use the following method. (1) In VM -- settings -- hard disk -- add,

Many people always ask this question, so here is a summary document for your reference. Here, we must first describe that the following steps are for Linux systems and not for wince. Maybe you will notice that there are far more people doing Linux

SSH is regarded as an enhanced version of Telnet. The password and information of Telnet are not encrypted, while SSH is encrypted. To use securecrt to connect to Linux-Ubuntu, you need the support of the SSH service. Many Linux systems do not

It is often the case that garbled characters occur during development or system management in Linux. The default Chinese encoding in Windows is bg2312, while in Linux it is UTF-8. Many timesCommunication with the Windows platform is free from

Multi-thread download tool in Linux-Axel Axel is a multi-thread download tool under the command line. It supports resumable data transfer, which is usually several times faster than wget.Its official website: Http://wilmer.gaa.st/main.php/axel.html :

Wireless Nic Configuration This article introducesConfigure the wireless network card manually on the command line interface. Currently, most popular releases support the network-Manager is easy to configure without using the original method

Library files are used when they are connected (static databases and shared libraries) and run (only programs that use shared libraries). Their search paths are set in the system. In LinuxAnd/usr/libThe two directories are used as the default

6.2.2 wall time Wall time: during system startup, the RTC chip stores data for initialization, maintains the data by the system clock during system operation, and synchronizes the data with the RTC chip at the appropriate time. The wall time is

  LinuxIs based onRunning level(Run-levels)The concept is calledSysvinit.It may be completely different on different systems, so it cannot be considered as a script inLinuxThe release is working properly. Sysvinit (called "init" from now on) works

The above examples are just some common sysfs attribute usage. In actual systems, there are often many other sysfs attributes that have never been seen before. Therefore, only examples are not enough, even if you maintain a sysfs attribute usage

3.6 access to I/O memory resources Although I/O port space was once widely used on the X86 platform, it is very small, so most modern bus devices use the memory ing method (memory-mapped ).Maps its I/O Ports (I/O registers) and peripheral memory.

Author:Liu Hongtao, senior lecturer of Huaqing vision embedded College, and an expert of arm authorized by ATC. In the previous article "using udev and sys to dynamically create device nodes", the device driver mainly relies on the following two

Abstract: For Linux users, ramdisk is no stranger, but why does it need it? This article introduces the role of ramdisk in the kernel startup process and its internal mechanism.TitleInitrd and initramfs processing in the kernelTemporary root

Processing Model Linux kernel startup involves initialization of many components and related configurations. These configuration parameters are generally configured through command line. Before proceeding with the subsequent analysis, let's take a

Access)Related functionsStat, open, chmod, chown, setuid, setgidHeader file# Include Define functionsInt access (const char * pathname, int mode );Function DescriptionAccess () checks whether an existing file can be read/written. The mode parameter

Blog master Press: In fact, I have long wanted to write this I2C, during which there are a variety of things to delay. Write this for reference by the comrades during the May Day holiday. It will take some time to study the kernel in the future.

This post describes the differences between kernel APIs (mainly semaphores and spin locks) provided by Linux kernel to address concurrency-caused competing states, focusing on usage. The Code-level reading is intended to be added.The competing state

Software Version:Operating System: ubuntu10.04Kernel version: Linux version 2.6.32-36-generic Content: If a program frequently accesses a large number of files, the Cache Usage will increase dramatically and it will not be automatically released

Iptux Tools: Operating System: ubuntu10.04Kernel version: Linux version 2.6.32-36-generic Directory: 1. Introduction2. Install and run3. Set4. send and receive5. References 1. Introduction I believe that on Windows, you must have used tools such as

Install and configure j2sdk in Linux!  1. Download a JDK for Linux platform. We recommend that you download the RPM self-extracting format(Rpm in self-extracting file, j2sdk-1_4_2_06-linux-i586-rpm.bin );2. Upload