Linux

As we all know, the kernel divides a linear address (also called a virtual address in most cases) into three parts: physical memory ing area, vmalloc ing area, and fixed ing address area. The first two types are discussed here. The so-called

I am familiar with Windows system and NT kernel.ProgramThis section compares the process thread concept in windows with the process thread in Linux. Process In Linux and Windows, the concept of process is basically the same, that is, an instance

According to foreign media reports, there must be a great woman behind a successful man ". Likewise, there must be a great man behind a great technology who is seeking for it. The following are the top 10 tech giants in the IT market to date: 1.

Linux learning advice http://you.video.sina.com.cn/a/2141327-1320045357.htmllinuxlearning recommendation 1 http://you.video.sina.com.cn/pg/topicdetail/topicPlay.php? Tid = 2141327 & uid = 1320045357 & t = 1 # 16520291linux learning advice 2

Configure the network connection.Step 1: Because virtualbox 3.0.8 has built-in bridging functions, you only need to install the corresponding services on the NIC. Details: Control Panel/network connection/Local

In order to improve disk access efficiency, Linux has made some careful designs, in addition to caching dentry (for VFS, accelerating the conversion of file path names to inode ), two major cache methods are also adopted: buffer cache and page cache.

CPU performance indicators: 1. CPU usage;CPU runs regular user processesCPU runs niced ProcessCPU runs Real-Time Processes 2. CPU usage of the system;For I/O management: interrupt and driverMemoryManagement: Page exchangeUser Process Management:

1. Use vmstat to analyze system I/O [root @ localhost ~] # Vmstat-N 3 (refresh every 3 seconds) Procs ----------- memory -------------------- swap --- Io ---- -- System ---- ------ CPU -------- R B SWPD free buff cache Si so Bi Bo in CS us Sy ID wa 1

At work, I need to copy the files on the remote server to the local computer, but I have to enter the password during SCP, and the document here cannot be implemented. Finally, I found a good job, wrong CT, automatic Login can be achieved. We can

Process Descriptor (process descriptor), as its name implies, is the description of a process. It is used to describe the data structure of a process and can be understood as the attributes of a process. For example, the Process status and PID are

Process: The address space where one or more threads are running and the system resources required by these threads. The process has its own stack space for saving local variables in the function.And control the call and return of functions. The

In fact, the question we want to talk about is a very mentally retarded question, because we have had such a question before, so write it down. I used to get started with RedHat 9 Linux when I was studying embedded systems. At that time, I was very

Generally,LinuxServerMostly throughSSHClient for remote login andManagementAfter logging on to the Linux host using SSH, how can we quickly interact with files on the local machine, that is, uploading and downloading files to the server and local

When the Linux kernel is looking for a new process to run on the CPU, you must only consider processes in the runable state (that is, processes in the task_running State ), because scanning the entire process chain table is quite inefficient, a

YesExec system callIn fact, in Linux, there is no exec () function form. Exec refers to a group of functions. There are 6 Functions in total: # Include Extern char ** environ; Int execl (const char * path, const char * Arg ,...); Int execlp (const

Author: gnuhpcSource: http://www.cnblogs.com/gnuhpc/ 1. Entry 1) makefile: Helps compile multiple files. 2) basic compiling example: Take the following four files as an example. //main.c#include"mytool1.h"#include"mytool2.h"int main(int argc,char

Author: gnuhpcSource: http://www.cnblogs.com/gnuhpc/ Linux initially did not need a graphical interface, because it had a very powerful text interface. By Ctrl-Alt-F1 (F1-F6 can generally be), and then wait for a while, will switch to TTY, that is,

Author: gnuhpcSource: http://www.cnblogs.com/gnuhpc/ Cron is a daemon that can be used to schedule the execution of repeated tasks based on the combination of time, date, month, and week.Cron assumes that the system continues to run. If the system

Author: gnuhpcSource: http://www.cnblogs.com/gnuhpc/ Linux/Unix is different from Microsoft's platform. The biggest advantage is the real multi-user, multi-task. Therefore, there are also special management ideas in task management.We know that in

Author: gnuhpcSource: http://www.cnblogs.com/gnuhpc/ /** =====================================================================================** Filename: more01.c** Description: A User Version of Command more** Version: 1.0* Created: 12/03/2008 06:3