Linux

Reference Link: http://zhuhaibobb.blog.163.com/blog/static/2744006720101049030606/ The Linux kernel provides a/DEV/MEM driver, provides a direct access to the physical address of the memory method, the implementation of two methods, one is device

In the daily use, or in the server, there are two network cards configured two addresses, access to different network segments, this situation is very common phenomenon, but, We need to add additional routing tables to determine which packets are

Reading notes 2013-2 Linux kernel design and implementation aIntroduction to the design and implementation of Linux kernelsThis book does not want to analyze Linux source code as a line of the book, but from the Linux history, Linux philosophy,

U-boot will pass a lot of parameters to the Linux kernel, such as: Serial port, RAM,VIDEOFB, etc. Linux kernel also reads and processes these parameters. The arguments are passed between the two through the struct tag.U-boot the object to be passed

Debugging for Linux under multi-process:(1)Follow-fork-modeSet Follow-fork-mode [parent | child] ———— Fork to select whether to debug a parent process or a subprocess(Parent:fork continues after the parent process is debugged; Child:fork after the

In Linux, device is busy processing, devicebusy When Linux manages umount devices, it often encounters "device is busy". If a file system of umount encounters this situation, and you are not in the directory to uninstall. It is very likely that a

Cannot restore segment prot after reloc: Permission denied, segmentreloc Edit/etc/selinux/config and find the following link:# This file controls the state of SELinux on the system.# SELINUX = can take one of these three values:# Enforcing-SELinux

Generate a file named after the current time in Windows and Linux In Windows and Linux operating systems, batchcompute files and shellscripts are used separately to generate a file named "20110228_082905.txt" with the name "year, month, day, hour,

How to determine the number of CPUs in RedHat The/proc/cpuinfo file has been updated in the latest versions of some operating systems to support multiple platforms. If the/proc/cpuinfo file in your system correctly reflects the processor information,

Will Git be used now? No, what can I do with these 10 tricks? Previously, we sent some tutorials to familiarize you with Git basics and use Git in a team environment. The Git commands we discussed are sufficient for a developer to survive in the Git

Linux index node and Value Linux index nodes and values (essential ). Audience, [Root@www.linuxdc.com aaa] # ls-l test. c -Rw-r --. 1 root 3 Aug 1 07:49 test. c # Look at bold 1 raw test. the index node value of the c file is 1, that is, each

Timekpr-parent control application in Ubuntu 14.04 Most modern families have at least one computer and all have been connected to the Internet. This leads to a question that has been widely debated by all sectors of the society: for children, the

Use Shutter in Ubuntu to screenshot the website In Ubuntu, you can use gnome-web-photo to take screenshots of webpages, but some friends say that they will never succeed. The environment is Ubuntu 10.04. When gnome-web-photo is used, the command

Emacs installation in Ubuntu has encountered dependency problems and solutions. The Ubuntu Software Center emacs version is 23, and the latest version 24.3 is released on the Internet. Many dependency problems are encountered during compilation and

Linux index nodes and values (essential) Audience, [Root @ luozhonghua aaa] # ls-l test. c-Rw-r --. 1Root 3 Aug 1 test. c # check that the index node value of the original test. c file in bold 1 is 1, that is, each file is unique when it is

Install Xen 4.1.2 On CentOS 6.5 InCentosInstallXenNot very smooth, and encountered many problems. The installation process mainly involves the following two documents: Http://wiki.xen.org/xenwiki/RHEL6Xen4Tutorial? Action = fullsearch & value =

CentOS scheduled tasksCron is a linux scheduled execution tool that can run jobs without human intervention. Since Cron is a built-in service in Linux, but it does not automatically get up, you can use the following methods to start and close this

Linux Advanced Skills: heartbeat + lvs (2)The previous post introduced the separate use of heartbeat. Today we will first introduce the separate use of lvs, and finally combine the two. Provide a comprehensive service.1. Three load balancing

Common shell Command records in Linux HardwareCPU Problems Lscpu # view cpu statistics. cat/proc/cpuinfo # view CPU details, such as the Model and clock speed of each CPU.Memory-related Free-m # view the memory in brief. The unit here is

CentOS update system After CentOS is installed, you must first modify the update source and upgrade it to the latest system.Domestic fast update sources, I recommend:Http://mirrors.163.com Netease update source, just found, the speed can also. First