Ganglia of Flume monitoring

About Ganglia Ganglia is an open source cluster monitoring visualization tool initiated by UC Berkeley, which is designed to measure thousands of nodes. Ganglia's core includes gmond, gmetad and a Web front end. It is mainly used to monitor the system performance, such as: cpu, mem, hard disk utilizat ...

Posted by mackevin on Wed, 19 Feb 2020 23:19:50 -0800

ubuntu 18.04 install opencv3.4.5 + opencv ﹣ contrib

ubuntu 18.04 install opencv3.4.5 + opencv ﹣ contrib 1. Installation package download Opencv and opencv contrib Download Pay attention to the consistency of versions opencv Download opencv official website Opencv? Contrib Download github 2. Install dependency package sudo apt-get update sudo ap ...

Posted by 90Nz0 on Tue, 11 Feb 2020 23:42:02 -0800

Ubuntu 18 replace software source

In Centos/RHEL system, the file to configure the yum warehouse is the. Repo file under the directory / etc/yum.repo.d /. In Ubuntu system, it is the / etc/apt/sources.list file The first element of configuring system files is to back up files. Generally, system files are kb level files, which don't oc ...

Posted by iPixel on Tue, 11 Feb 2020 07:46:19 -0800

Mac OS cracking WiFi(WPA, WPA2)

The winter vacation in 2020 is true, brother I silently brush the tutorial of security cattle at home, and the latest brush is the chapter of "wireless attack". Although Kali virtual machine is installed on the school machine, there is no Usb wireless network card. So I tried it with MacBook. ...

Posted by stonelord on Mon, 10 Feb 2020 22:29:13 -0800

Initial experience of XXL job distributed task scheduling

brief introduction XXL-JOB Is a lightweight distributed task scheduling platform, its core design goal is to develop quickly, learn simple, lightweight, easy to expand. Open source code and access to a number of companies online product line, out of the box. The official documents are very complete, so there is no need to elaborate. This paper ...

Posted by jonah on Mon, 10 Feb 2020 08:24:36 -0800

Android source compilation

Android source compilation Before compiling the source code, you need to do some preparation operations. The detailed steps are as follows: 1. Install JDK. Google requires JDK 1.8 to compile the latest version of source code 1) . download JDK1.6 at: http://download.oracle.com/otn/java/jdk/6u45-b06/jdk-6u45-linux-x64.b ...

Posted by joeywoodbury on Sun, 09 Feb 2020 08:49:09 -0800

Construction of pixhawk development environment under Ubuntu 16.04

1 Introduction I am a px4 Xiaobai. I don't know a lot about programming. I am a researcher. I am engaged in the theory of flight mechanics and control direction deviation. But my tutor is engaged in the development direction of px4. I don't have to set up a px4 development environment and learn the co ...

Posted by hyngvesson on Thu, 06 Feb 2020 02:21:10 -0800

TypeError: type str doesn't define __round__ method

I was bluffed at first, but later I found it was a basic problem, The final results are as follows:   #!/usr/bin/env python3 # -*- coding:utf-8 -*- import subprocess def collect(): filter_keys = ['Manufacturer', 'Serial Number', 'Product Name', 'UUID', 'Wake-up Type'] raw_data = {} ...

Posted by Base on Tue, 04 Feb 2020 06:27:39 -0800

Install the Elastic Stack component (elastic search, logstash, kibana, filebeat) error report brocade set

Error 1: kibana login error, check the log and find: crypt_r() failed $ cat /var/log/nginx/error.log 2020/01/28 12:11:38 [crit] 8863#8863: *3 crypt_r() failed (22: Invalid argument), client: 10.20.44.113, server: xx.xx.xx.xx, request: "GET /status HTTP/1.1", host: "xx.xx.xx.xx" Cause analysis # Whe ...

Posted by jenniferG on Mon, 03 Feb 2020 06:54:32 -0800

Simulate weak network environment using command line under Mac

For audio and video development, we often need to simulate the weak network environment and observe the performance of APP under the weak network, such as packet loss, delay, jitter, bandwidth restriction, etc. Mac system has a weak network tool APP, called Network Link Conditioner, which supports the visualization of the simulation and config ...

Posted by bugsuperstar37 on Sun, 02 Feb 2020 10:19:02 -0800