touchpoint systems

As a saying, I would like to give some suggestions to students eager to learn embedded systems: (1) the software and hardware of embedded systems are closely related, so we must lay a solid foundation for software and hardware. In fact, as long as you find the correct method and work hard, any science and engineering students, or even non-science and engineering students, can learn embedded

A file system is a directory structure that includes storage devices or partitions. Generally, an application storage device can contain one or more file systems. Generally speaking, a file system stores files or data in an organized manner, with the aim of making it easy for the operating system to query and access data. Common file systems include FAT3, NTFS, Ext3, and Reiserfs. However, different operati

Address: http://www.cnblogs.com/ibook360/p/3159544.html 1. Background Many companies' platforms generate a large number of logs (generally stream data, such as search engine PVs and queries) every day. to process these logs, a specific log system is required. Generally, these systems must have the following features: (1) build bridges between application systems and analysis

the metadata information. Obviously, the larger the file system to be detected, the longer the detection process takes. For partitions with a size of dozens of G, it can take a long time to detect. As Linux starts to be used for more and more important applications in large servers, it is becoming more and more intolerable for long time machines. This requires more sophisticated and sophisticated file systems to replace Ext2. Therefore, the log-file

1 What is an operating systemOperating system is located between the computer and application software, is a coordination, management, control of computer hardware resources and software resources of the program2 Why do I have an operating system?1. Control the hardware. 2, the complex operation of the hardware package into a beautiful simple interface, to users or applications to usea complete set of computer systems consists of three parts.Applicati

Unix system is widely used Linux system, and based on the Linux kernel also has a lot of other derived systems, including Debian, Ubuntu, such as the system, in the Linux system usually use the habit of booting/etc/rc.local or/etc/ Rc.d/rc.local There is no, that in Debian, Ubuntu need to start when the need to use UPDATE-RC.D to define the boot command, to give a simple example in Debian, Ubuntu boot iptables:In Debian, Ubuntu iptables is not made si

, China's education has a lot of loopholes, From the computer system alone, for the children of the ideological indoctrination, at least now is not right, because now almost all are learning how to use Windows, indeed, this is easy to learn, but now with the progress of science and technology, more and more places to use Linux, Linux needs to instill this system of thought, open source ideas, not just graphical interfaces, from a young age. Now, regardless of science and technology, thinking sty

1. Locking system Important filesThe system operator may sometimes encounter situations where a file cannot be modified or deleted by the root user, most likely because the file is locked. The command to lock a file under Linux is Chattr, which allows you to modify the file properties of the Ext2, ext3, and Ext4 file systems, but this command must be performed by Superuser root. The command corresponding to this command is lsattr, which is used to que

Content:Automated installation of Linux systems with kickstartMake CD, u disk boot diskfirst, the System Automation installation :1, AnacondaFrom the previous study we know that the system starts the process:Bootloader-->kernel (INITRAMFS)-->rootfs-->/sbin/initTherefore, the bootloader can be fully bootable by the CD, and during the boot process, the process is automatically installed with the help of Kickstart.Anaconda is the installation management

Systems two times;Redhat is divided into Rhel and Fedora,rhel are enterprise-oriented systems, very stable and reliable, fedora is a user-oriented system for personal use, updated very fast, the latest features, CentOS system is fully compatible with Rhel, and eventually by Redhat company acquisition, Become a product.3, describe the philosophy of Linux, and according to their own understanding of its inte

Adding partitions, file systems, and permanent mountsOne, disk partitioning1. Concept: A disk partition can divide a hard drive into multiple logical storage units, also known as partitions. 2. disk partitioning scheme:MBR partitioning scheme,GPT partitioning scheme(1) MBR partitioning scheme:MBR partition scheme (Master Boot Record Partitioning scheme), which refers to the running BIOS how the disk should be partitioned on the firmware's system.

This is a series of articles about Linux systems, which I found in learning Linux.The author introduces this series of articles in this article: In this series of articles I describe the basic concepts of Linux. The Linux operating system inherits from UNIX. An operating system is a set of software that controls and uses computers. UNIX is a set of rules that all UNIX systems obey the same philosophic

initializing secondary cards), and in systems with ATOM bios The command tables is used for setting up, the displays and changing things like engine and memory clocks. Next, we initialize the BIOS scratch registers (Radeon_combios_initialize_bios_scratch_regs () via Radeon_combios_init () ). These registers is a-on-the-same-the-firmware on the system to communicate state to the graphics driver. They contain things like connected outputs, whether the

Shmmax maximum value in Linux x86 and x86-64 systemsReference text:Maximum SHMMAX values for Linux x86 and x86-64 (document ID 567506.1)Goal:Problem 1:32-bit (x86) maximum value in Linux system systems?Problem 2:64-bit (x86-64) maximum value in Linux system systems?Solution:Answer 1:Oracle Global Customer Support official recommendation SHMMAX The maximum value is less than 4GB, or 4294967295The maximum siz

Users who are accustomed to Windows systems may initially have a bad grasp of the Linux system, and many features may not be used very well. This article introduces a small application of Linux systems: Use mail to send Internet Mail under Linux. But before I introduce mail, let's take a look at the SendMail service. The SendMail service on Red hat is typically started automatically. You can view the statu