1, Introduction to crontab
1. crontab is used to allow users to execute programs at fixed times or intervals If you need to implement the task scheduling function on linux platform, you can write cron script to implement it. Perform tasks at a certain frequency linux will start the crond process by default. The crond process does not need to b ...
Posted by lrsdsout on Sun, 15 May 2022 18:18:13 +0300
For the maintenance and management of Linux system, its performance monitoring is very important, especially the real-time monitoring data. This data is helpful for us to judge the load pressure of the server, adjust the resource allocation in time, and better serve the business. So today, the migrant worker brother gives you a Linux performanc ...
(please leave a message for advice on the inadequacies of the first learning experience)
Environment tools (VMware, MobaXterm, CentOS7, JDK8, Hadoop 2.9.2)
The required tool environment can be extracted in this link Link: https://pan.baidu.com/s/1VCXtS6fm6YvHMtBFrgNx6Q Extraction code: xpgu 1, VMware installation The i ...
Posted by CrusaderSean on Sun, 15 May 2022 07:54:17 +0300
Day01: Let's regain our love for our dream lover C and C + + [IT C/C + + Series Courses] Operating System Fundamentals Course
A "shuangwen" programming tutorial of "against the sky"
BILIBILI IT goose BILIBILI@IT goose
[C/C + + Series Courses] Operating System Fundamentals Course This cours ...
Posted by PHPcoder25 on Sun, 15 May 2022 00:51:08 +0300
In Linux system applications, it is often necessary to obtain the current time information. The Linux kernel provides some corresponding functions for operation. The standard calling format is described as follows:
char *asctime(const struct tm *tm);
char *asctime_r(const struct tm *tm, char *buf);
char *ctime(const ...
Posted by w4designs on Sat, 14 May 2022 14:16:42 +0300
TLS(Transport Layer Security (secure transport layer), TLS is a protocol built on the TCP protocol of the transport layer and serves the application layer. Its predecessor is SSL (Secure Socket) Layer, which realizes the function of encrypting the message of the application layer and then sending it to TCP for transmission.
Posted by aggrav8d on Sat, 14 May 2022 13:51:49 +0300
1, Introduction to Harbor
Harbor is an open source enterprise dockerregistry (warehouse) project of VMware. The project address is https://github.com/vmware/harbor.
Harbor's goal is to help users quickly build an enterprise level DockerRegistry service.
Based on docker's open source registry, Harbor provides functions required by enterprise u ...
Posted by sith717 on Sat, 14 May 2022 10:39:11 +0300
System call: System calls are some functions provided by the operating system for programmers to call. These calls have been encapsulated in the form of C functions, but they are not part of standard C.
General applications run in user mode (using 0 to 3G memory), and system calls work in kernel mode (using 3 to 4G memory).
The commonly used ...
Posted by ghostdog74 on Sat, 14 May 2022 06:43:50 +0300
When using multithreading for development, you will probably encounter deadlock problems. How to troubleshoot the deadlock problem has also become very important.
In the first step, we can capture the information of the current program running stack through pstack. After multiple capture and comparison, we can find the deadlock. Next, you can ...
Posted by gpong on Sat, 14 May 2022 05:03:21 +0300
1, Basic format of command
rootCurrent login userlocalhosthost name~Current directory#Prompt for superuser$Prompt for ordinary users
command [option] [parameter]
==Note: = = individual commands do not follow this format. When there are multiple options, they can be written t ...
Posted by lancia on Fri, 13 May 2022 23:53:07 +0300