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,

It said so many common commands, there is a function we also often use, is the timer, schedule, generally through the crontab to run;crontab specifies that specific scripts are executed at fixed or fixed intervals; crontab has the following 3 common

Linux under chage command detailed Function: Modify the expiration date of the account and passwordUsage:chage[-l][-m mindays][-m maxdays][-i inactive][-e expiredate][-w warndays][-d lastdays]usernameOptions and Parameters:- L : Lists the

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

"Bird Brother's Linux private cuisine" Basic study P382 said that in bash "=" and "= =" are the same, all mean to judge whether the equality, but because other languages generally written using "= =", it is recommended to use the latter. but in the

2014-07-29 23:36:10Use file descriptors to represent device files and normal files under Linux. The file descriptor is an integral type of data, and all operations on the file are implemented through file descriptors.The file describes the hub in

The meaning of the number represented by the man command1. View by Man 7 Mans1 commands or executable files that the user can manipulate in a shell environment such as which2 system core can call functions and tools, etc.3 some commonly used

This article is a summary of their work encountered in the common Linux commands, will continue to update!1. File path switchGo to CDReturn to the previous level CD.2. CopyCP source file name destination folderCP Log.log TEST53. Edit File VIWhen

Disks and partitionsHard disk partitions are divided into primary partitions, extended partitions, and logical partitions. A hard disk can have up to 4 primary partitions, where one primary partition can be replaced with an extended partition, and a

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,

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

How to mount iscsi targets on centos Few users set authentication passwords on iscsi targets. This is not safe. You can talk about the mounting process here: First, you need to download the Mount utility: Yum search iscsi: Iscsi-initiator-utils

Linuxcsocket source code case Service end # Include # include # include # include # include # include # include # include # include # include # define MYPORT 8887 # define QUEUE 20 # define BUFFER_SIZE 1024int main () {// defines sockfd

View the running path of a process in linux In linux, you may think of ps-ef | grep XXX. But what we see is not the full path. How can we see the full path? After each process is started, there is a pid path under/proc. Example: ps-ef | grep

Linux Advanced Skills: Cluster construction (1)1. Cluster introduction:Cluster technology is a new technology. With cluster technology, you can obtain relatively high performance, reliability, and flexibility at a low cost, task Scheduling is the