Linux system running analysis tool - Summary of the use of the sarcommand

catalog   sar introduction sar usage sar installation and startup sar usage 1. Historical statistics 2. Statistics of CPU usage Sar-u 23 ා statistics every 2 seconds three times in total sar -q ා view average load 3. Check memory usage 4. View system Swap partition information 5. View I/O ...

Posted on Thu, 25 Jun 2020 23:21:20 -0400 by waq2062

The installation tutorial of MinGW-w64 for gcc

1, What is MinGW-w64? The full name of MinGW is: Minimalist GNU on Windows. In fact, GCC, the classic open source C language compiler, is ported to the windows platform and contains the Win32 API, so the source code can be compiled into executable programs that can run in windows. In addition, you ...

Posted on Thu, 25 Jun 2020 06:26:36 -0400 by jay_bo

Step by step learning linux operating system: 10 process data structure II

task_ Source location of struct: linux-4.13.16\include\linux\sched.h Operation statistics Including user / kernel running time, up / down switching times, startup time, etc; u64 utime;//CPU time consumed in user mode u64 stime;//CPU time consumed by kernel state unsigned long nvcsw; ...

Posted on Thu, 25 Jun 2020 00:28:10 -0400 by mjurmann

Selenium+Tesseract cracking login verification code

preface The type of login verification code I cracked is the type of mathematical formula, i.e... does it look simple, but Tesseract's recognition rate of this kind of picture is also very low. If I want to improve the recognition rate in the later stage, I think one is to reduce the noise and sharpen the picture, and the other is to train Tess ...

Posted on Thu, 25 Jun 2020 00:25:22 -0400 by tjhilder

Linux system security management

Article catalog 1, Account security control 1.1: basic measures for account security 1.1.1: system account cleaning 1.1.2: password security control 1.1.3: command history, automatic logout 1.2 user switching and rights raising 1.2.1: su command - switch user 1.3: PAM security authentication in Li ...

Posted on Wed, 24 Jun 2020 23:16:52 -0400 by gsaldutti

Hexo +gitee blogging for the most complete teaching

Hexo is a fast, concise and efficient blog framework.Hexo Use Markdown (or other rendering engine) parses the article and generates a static web page with beautiful themes in seconds. Hexo is one of the most popular blog frameworks, so I'll try to do some basic functionality testing myself.The reason ...

Posted on Wed, 24 Jun 2020 22:26:30 -0400 by fwegan

awk different separator-space separator

Today when I formatted the string with awk, I found a strange phenomenon. I checked the awk manual and recorded it here. Sample Text Content Appearing in all awk names afterFile.txtThe contents are as follows: # cat -A file.txt 1^Iroot:x:0:0:root:/root:/bin/bash$ 2^Ibin:x:1:1:bin:/bin:/sbin/nologin$ 3^Idaemon:x:2:2:daemon:/sbin: ...

Posted on Tue, 23 Jun 2020 12:55:31 -0400 by Brudus

[linux] learn operation and maintenance step by step - Basic chapter - file permission management

Write before: Blogger is a rebel who pursues freedom after 80's standard of devoting himself to education and training. His nickname comes from Su Shi's "the height is too cold" in "the head of the tune of water". He always reminds himself to stand the loneliness and suffer the loneliness. On the road of technology, he is ...

Posted on Tue, 23 Jun 2020 03:37:21 -0400 by Fribbles

How to do well in containerization management? Tencent architect's article takes you through the Docker principle

This article has been included GitHub There are also real interview questions, interview strategies, efficient learning materials, etc 1, Implementation principle of container In essence, container is a sandbox technology. It's like isolating an application in a box and making it work. Because of the box boundary, there is no interference b ...

Posted on Mon, 22 Jun 2020 00:38:31 -0400 by LearningKid

Docker-swarm for Container Technology

In the previous section, I talked about the simple use and basic principles of docker machine, refer back to https://www.cnblogs.com/qiuhom-1874/p/13160915.html ; Today let's talk about docker cluster management tool docker swarm; docker swarm is the official cluster management tool for docker, which allows cross-host nodes to create and manage ...

Posted on Sat, 20 Jun 2020 12:53:46 -0400 by nel