Deep Understanding of Linux CPU

Preface When analyzing the load characteristics running on linux machines, it is often necessary to analyze many metrics. CPU is one of the key factors affecting the efficiency of load operation. Here, the metrics of CPU extracted from promethues are analyzed in detail. It is also an in-depth understanding of linux CPU. 1. U ...

Added by snipe7kills on Wed, 15 May 2019 06:02:42 +0300

Learn Linux (10) ls commands every day

Reference material: [1]Learn Linux (8) Soft and Hard Links Every Day [2]Twenty practical examples of Linux ls commands The instructions we learn today are the most common of our instructions, ls. The instructions refer to the man manual. Sketch ls (LiSt directory contents) lists directory contents. format ls [optio ...

Added by forcom on Wed, 15 May 2019 00:50:39 +0300

Go Implements Mass Log Collection System (3)

I've reorganized the box for this log collection system, as shown below The overall logic of the code to be implemented this time is: The full code address is: https://github.com/pythonsite/logagent Introduction to etcd Highly available distributed key-value storage for configuring sharing and service discovery Similar projects: zookee ...

Added by laflair13 on Tue, 14 May 2019 23:30:40 +0300

Seenium Start Chrome Configuration Parameters Problem

Every time selenium starts chrome browser, Chrome browser is clean, no plug-ins, no collection, no history. This is because selenium starts a naked browser to ensure the fastest running efficiency when starting chrome. That's why it needs to configure parameters, but sometimes we need more than a naked browser. The selenium startup configuratio ...

Added by eruiz1973 on Tue, 14 May 2019 21:25:04 +0300

openssl certificate issuance under linxu

openssl components have been integrated in linux, so bloggers use examples to explain how to issue certificates under Linux system, because personal certificates are not recognized by Google Browser, so self-issued certificates can only be tested under Firefox browser! 1 openssl Certificate Generation Process Once the certific ...

Added by chrispos on Tue, 14 May 2019 20:00:37 +0300

Chapter 1 - MySQL - Introduction and Installation - Ultra-detailed

MySQL - Chapter 1 - Introduction and Installation 4. Enterprise Selection of MySQL Version 4.1 specification GA Version: Stable Release Version Version 4.2 Type E: Enterprise Edition, Charge Edition, SR (Service), Traditional Industry C: Community Edition, Open Source, Internet Enterprise Choice 4.3 Enterprise Version Selection Generally new ...

Added by ERuiz on Tue, 14 May 2019 19:13:13 +0300

Driver development from scratch, linux driver (6, multiple led drivers with character driver)

In the last section, we wrote a simple single led driver that can manipulate hardware. In this section, we mainly show how to use multiple secondary device numbers to register multiple led drivers. At the same time, we use the lower gpiolib library to use some special operations for gpio.   Here is the main code snippet. I ...

Added by jibosh on Tue, 14 May 2019 16:26:46 +0300

Linux-ftp Virtual User Configuration

Cloud server ESC deploys vsftpd virtual users Description: Cloud server deployment and local server deployment need to open the specified port, but the cloud server needs to open the corresponding port in the security group rules to allow passage. Environmental description: The corresponding user corresponds to different passwords and differ ...

Added by agret on Sun, 12 May 2019 12:52:35 +0300

How do I program pwd commands on Linux?

What is the 0x00 pwd command? pwd is used to display the path to the current directory. How does the 0x01 pwd command work? We know that a directory contains two special directories. and.. Representing the current directory and the previous directory, respectively.We can first find the inode node number of.And then go back t ...

Added by defx on Sun, 12 May 2019 11:09:45 +0300

Linux Audio Driver 5: UDA1341 Chip Operating Interface

This paper is a learning note based on Linux version number of mini2440 development board linux-2.6.32.2 I. Hardware information of uda1341 The CPU controls uda1341 chips through L3 interface, which are: L3DATA: Data Line L3MODE: Mode control line, 0, address mode; 1, data mode L3CLOCK: Clock Line Address mode: data[7:2]: Rep ...

Added by bloo on Sun, 12 May 2019 10:19:52 +0300