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In Linux, the fork system call can be used to create a child process. The child process will inherit most of the properties of the parent process, and then the child process will call the exec cluster function to run other programs. Let's take a concrete example to illustrate the relationship between parent-child processes #include <stdio.h ...

Oracle's machine was blown up, so that the little partners could not open the free machine, so they wrote a script and robbed it on the server. When the resources came out, they could basically open it. This script uses Terraform to call API to execute tasks. The following is a brief description. Oracle ARM has been used by everyone for a wh ...

Title Description Given two arrays of length m and N, the elements are composed of 0-9, representing the numbers on each bit of two natural numbers. Now select k (k < = m + n) numbers from the two arrays and splice them into a new number. The numbers taken from the same array are required to maintain their relative order in the origina ...

Multithreading Create thread There are three ways to create threads Inherit the Thread class and override the run methodImplement Runnable interfaceImplement Callable interface Inherit Thread class Inherit the Thread class and override the run method package Thread; public class MyThread extends Thread{ @Override public void run( ...

preface The ECS that Alibaba cloud bought for 95 yuan is about to expire. It needs more than 1000 to renew. I thought there was nothing important on the server, so I took advantage of Tencent cloud discount and spent 288 to buy a three-year CVM. CVM is a cloud virtual machine. Let's call it a server for the time being. 1 core 2G, it seems tha ...

object-oriented The essence of object-oriented programming is to organize code in the form of classes and encapsulate data in the form of objects 1. Relationship between class and object Class is an abstract data type. It is the overall description / definition of a certain kind of transaction, but it can not represent a specific thing Pe ...

What's Helm? Helm is the package manager of Kubernetes. Like package management tools such as yum and apt, helm can easily deploy the applications we want with one click. Writing Helm has three main goals: 1. Easily realize "from zero to Kubernetes"; 2. Provide a software package management system similar to the operating syste ...

1, PXE 1. Principle and concept: The pre boot execution environment (PXE), also known as the pre execution environment, provides a mechanism for starting a computer using a Network Interface. This mechanism allows the computer to start without relying on the local data storage device (hard disk) or the locally installed operating system. Ser ...

1, Definition of singleton mode Definition: ensure that there is only one instance of a class and provide the global access point of the instance. The advantage of this is: for some instances, only one global instance is enough. Using the singleton mode can avoid the frequent creation and destruction of a global class, which consumes system r ...

  compare some differences between C and C + + definition categories to Stack as an example:    C language defines the stack is nothing more than defining a structure and then defining some functions. Its data and functions are separated. When operating data, you need to call the initialization function after defining the t ...