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Original link: http://blog.chinaunix.net/uid-22548820-id-3181798.html Fork (/directory/script.sh): If the shell contains execution commands, the subcommands do not affect the parent's commands. When the subcommand executes and then executes

RPM: The difference between fork, source, and exec in LinuxThe shell commands can be divided into internal commands and external commands. Internal commands are implemented by special file formats. Def, such as cd,ls. While external commands are

(I) DD: reads data from one source and writes it to another destination address in bits. [root@linwaterbin ~]# dd if=/dev/zero of=/home/oracle/disktest bs=1M count=512 conv=fdatasync NoteIf: from whereOf: where to goBS: size of data blocks read each

Centos performance monitoring series 2: initial solution of CollectlFor a Linux system administrator, it is the primary responsibility to ensure that the system managed by the Administrator is in a good state.Linux administrators can find many tools

0x00– Error InjectionMySQL error injection, we sometimes encounter no normal data echo injection. At this point, we need to inject the error to get the data we need.We used to have floor (), Updatexml (), Extractvalue () find some functions by

Grid system in English as "grid systems", but also translated into "grid system", the use of fixed grid design layout, its style neat and concise, after the Second World War is popular, has become the main style of publication design today.In 1692,

Script A (test example 1) The code is as follows Copy Code #!/bin/bashEcho ' Your are in the ' Q) Call another script file in the current script file? Method One: Using source Script second (test example 2)

Description: function name: SleepFunction: Execution hangs for a period of timeUsage: unsigned sleep (unsigned seconds);Using the top file in VC#include In the GCC compiler, the header file used differs depending on the GCC versionThe header files

Introduction to several tools for stress testing on Linux disks or other types of servers (I) dd: reads data from one source and writes it to another destination address in bits [SQL] [root @ linwaterbin ~] #

First, risk management1. What are the six processes of risk management? RememberFor:(1) Risk management planning;(2) risk identification;(3) Qualitative risk analysis;(4) Quantitative risk analysis;(5) Preparation of the response plan;(6) Risk

Preface: PHP in the operation of various types of database support, the operation of the file also has a very rich operation method, many friends now operation is still based on the file operation but sometimes in the operation of the file there is

Author: Yang Zongwei Objective: PHP in the operation of various types of database support, the operation of the file also has a very rich operation method, many friends now operation is still based on the file operation but sometimes in the

1. String Type commandSet value: Set ID 001 Gets the value: Get ID Delete key value: Del ID verify key exists: Exists IDShow All Key:keys *INCR, Incrby specify how much to increase, DECR, Decrby specify how much to reduce127.0.0.1:6379> Set counter 1

[Copyright notice] 　　 Copyright (c) 1999 　　　　 This tutorial is translated by * huluwa * and is modified as needed, so that it can be freely used for non-commercial purposes. However, this [copyright notice] Must be copied during

Introduction to several tools for stress testing on Linux disks or other types of servers (I) dd: reads data from one source and writes it to another destination address in BITs [SQL] [root @ linwaterbin ~] # Dd if =/dev/zero of

1. C and C + + differences2. What is the use of const There are three main points:1: Define read-only variables, constants2: parameter of modifier function and return value of function3: The definition body of the modifier function, where the

PHP Operation File FAQ Objective: PHP for various types of database operations have support, the operation of the file also has a very rich way to operate, many friends are now operating or based on file operations but sometimes in the operation of

Grid system in English as "grid systems", also some people translated as "mesh system", the use of fixed lattice design layout layout, its style neat and concise, in the Second World War after the great popularity, has become today's publication

1. What is the idea of object-oriented program design? A: The data structure and the methods of operation of the data structure are encapsulated to form an object. 2. What is a class. A: Classify objects that have commonalities to form a set,

Preface: PHP for various types of database operations have support, the operation of the file also has a very rich way to operate, many friends are now operating or based on file operations but sometimes in the operation of documents there are still