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Enables EventLoop to handle timer events Timing function Used to make the program wait for a period of time or schedule a scheduled task: sleep alarm usleep nanosleep clock_nanosleep getitimer / setitimer timer_create / timer_settime / timer_gettime / timer_delete timerfd_create / timerfd_gettime / timerfd_settime chooses this method. ...

How kubedm works Install master When initializing the master, just execute the kubedm init command: kubeadm init --pod-network-cidr 10.244.0.0/16 --kubernetes-version st able This command will automatically: System status inspection;Generate a token;Generate self signed CA and client certificate;Generate kubeconfig to connect kubelet to A ...

Most of the environments described in this article are based on linux. For a program, under Linux, we can find the corresponding process ID according to the program response information: ps -ef | grep java | grep -v grep | |awk '{print $2}' In this way, we can get the process id and PID of the corresponding program After obtaining the PI ...

catalogue 1. Install the package on which Nginx compilation depends  2. Download and install Nginx Generate certificate: Configure nginx https: 1. Install the package on which Nginx compilation depends In centos, you can use yum to install the following dependent packages: yum install -y gcc gcc-c++ pcre pcre-devel zlib zlib-deve ...

1. Foreword When looking at Chapter 8 of advanced programming in unix environment, I mentioned orphan process and zombie process. I have been vague about these two concepts. Today, I was asked what is the orphan process and zombie process, what problems will be brought about and how to solve them. I just stay on the concept without going deep. ...

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 ...

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 ...

catalogue 12.1MySQL configuration file (1) Configuration section (2) Basic configuration (3) Memory and optimized configuration (4) Log configuration 12.2 data backup and restore (1) Data backup (2) Data restore (3) Binary log 12.3 multi instance deployment 12.4 master slave replication 12.1MySQL configuration file (1) Configu ...

1. Definition of variables A variable is the address of an area of memory Meaning of variables The command cannot manipulate the value that changes all the time. Using a fixed string of characters to represent an unfixed target can solve this problem 2. Variable definition method in shell script Environment level: the variable becomes invalid a ...