Linux

Fourth chapter: Process schedulingone, multi-tasking1. Non-preemptive multi-taskingThe process is executed until it is actively stopped (this step is called concession)2. Preemptive multi-taskingThe Linux/unix uses a preemptive approach; the action

20135118 Roppongi Learning this week is the Linux kernel process scheduling, before we have in the operating system to explain the classification of process scheduling, as well as some scheduling algorithms. While the process scheduling in Linux is

Study notes:The timing analysis of process scheduling and process scheduling1. Different types of processes have different requirements for scheduling requirements:First Category:-i/o-bound: Frequent I/O, often spending a lot of time waiting for I/O

-----------------------------------------------------------------------------------The process of understanding process scheduling and process switching during the time-tracking analysis process--------------------------------------------------------

One, the script#!/bin/shDir=/data/ascenlink/logs#T = ' Find $DRI/*-type f-mtime +365 '#rm-RF $Ti=$ (df-h |grep-v data2 |awk '/data/{gsub ("'% '", "");p rint $4} ')If [$I-gt];thenMV $DIR/*.tar.gz/data2/backuplogecho "No enough free Disk Space for

It feels great to buy a new hard drive and install the CentOS 7 OS, and as a Java programmer, the first thing to do is to install a JDK. Used to download the TAR package and then unzip the configuration environment variable, today change, with RPM

1. Introduction to CommandsThe Touch command changes the access time and modification time for each file to the current time.2. UsageTouch [Options] ... File...3. Options -A only change the access time -C,--no- Create creates no

Start by creating a file system folder that forms the most basic file system directoryvar# mkdir Usr/bin usr/lib usr/sbin lib/modulesCreate a device file# CD rootfs/dev# mknod-m 666 console C 5 # mknod-m 666 NULL C 1 3Compiling BusyBoxDownload the

A practical example of a Linux link file1. Grammarln parameter source directory or file destination directory or file (link_name)Divided into hard links and soft links.2. Establish linksLn-s/file1/file23. Delete linkRM-RF Link Name4. Note:A, general

start the first step --load the BIOSwhen you turn on the computer, the computer loads the BIOS information first, and the BIOS information is so important that the computer must find it at the very beginning. This is because the BIOS contains

Modify/Current user/.bash_profile file, modify export PATH, add your own executable program directoryFor example:/root/. Bash_profileexport PATH= $PATH:/usr/local/autoconf/bin:/usr/local/libtool/binOnce modified, exit the current session and

Introduction and classification system operating level Run Level meaning 0 Shutdown 1 Single-user mode, which can be imagined as a safe mode for Windows, primarily for system

1. Join me at present with VI compiler a.txt, but I want to go back to the shell to do something else, together I am esc-->:!ls so now is Z Ctrl + Put VI into the backstage, go to shall under operation, want to go back to VI under command [[email

Check to see if the CentOS JDK is installed.Yum List installed |grep java.If you have a JDK with your own installation, uninstall the CentOS system from your Java environment?Yum-y Remove java-1.7.0-openjdk*.Yum-y Remove Tzdata-java.noarch.When the

/*********************************************************************** * Linux Watchdog Test Program * Description: * Because the previous reset has not been resolved, so this watchdog function has not been processed, * Now the problem solved, so

Data disks mounted to centos and data mounted to centos First, check whether the hard disk device has a data disk. Fdisk-l 2. Hard Disk partitioning Fdisk/dev/vdb Third, ext3 format Partition Mkfs. ext3/dev/vdb1 4. mount a new partition

RHEL genuine authorization yum Registration MethodRHEL Registration MethodThe Red Hat service is based on submodules. That is to say, after you buy RHEL, You need to register your installation version with RHN so that you can download and update the

Install libreoffice and 14.04 libreoffice in ubuntu 14.04 x64 LibreOffice is an office software on ubuntu. Many people know Microsoft's Word, Excel, PowerPoint, and Outlook, but few know LibreOffice. LibreOffice is maintained by volunteers from all

Qilin open-source bastion host network device usage SolutionPart 1 Project Overview 1.1 Requirement Analysis Most companies have not yet formed a complete set of management methods for O & M management of network devices. Some companies have

Nginx networking 403 Forbidden static files cannot be viewed Nginx 403 Forbidden errors indicates that you are requesting a resource file, but nginx does not allow you to view it. 403 Forbidden is only an HTTP status code. Like 404,200, it is not