kafka-server-start.sh config/server.properties & kafka-server-stop.sh kafka-topics.sh    --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic kafkatopic kafka-topics.sh --list --zookeeper localhost:2181 kafka-console-prod…

Network Basic Commands Summary set or modify hostname a)     temporary ways hostname NEW_HOSTNAME, but if you reboot your system, it will disabled. b)    permanent ways: edit "/etc/sysconfig/network" HOSTNAME, then restart system, it will effect…

Just sharing what I have learned about postgres recently. Here is a part of basic commands you may need. Enjoy it! Before try the following commands, please ensure you are followed the introductions on github: https://github.com/thoughtworks/vagrant-…

Welcome to Linux world! Introduction and Basic commands--Part one J.C 2018.3.11 Chapter 1 What Is Linux? Linux is a Unix-like open source operating system. At the core of the operating system is the Linux kernel. It acts as the intermediary between t…

1.Basic Operations 5+6 3-2 5*8 1/2 2^6 1 == 2 %false ans = 0 1 ~= 2 %true ans = 1 1 && 0 %AND ans = 0 1 || 0 %OR ans = 1 xor(1,0) %ans = 1 PS1('>> '); %change the command prompt info a = 3 %show a = 3 in screen a = 3 %not show a = 3 in scree…

1. man - an interface to the on-line reference manuals $man man 2. apt - advanced package tool SEE ALSO: apt-cache, apt-get, apt.conf, sources.list $apt-cache search mysql 3.sudo - execute a command as another user (sudo allows a permitted user to ex…

Overview In Apache Kafka, the security feature is supported from version 0.9. When Kerberos is enabled, we need to have the authorization to access Kafka resources. In this blog, you will learn how to add authorization to Kafka resources using Kafka…

This is intended to be an easy to understand FAQ on the topic of Kafka. One part is for beginners, one for advanced users and use cases. We hope you find it fruitful. If you are missing a question, please send it to your favorite Cloudera representat…

1:Kali Version root@kali-node01:~# cat /etc/os-release PRETTY_NAME="Kali GNU/Linux Rolling" NAME="Kali GNU/Linux" ID=kali VERSION="2018.2" VERSION_ID="2018.2" ID_LIKE=debian 2:Kali Kernal Version root@kali-node01:~#…

FROM: http://www.tecmint.com/13-basic-cat-command-examples-in-linux/ The cat (short for “concatenate“) command is one of the most frequently used command in Linux/Unix like operating systems. cat command allows us to create single or multiple files,…

官网 http://kafka.apache.org/ 多生产者多消费者 多topic和多分区 多消费者组.每组中消息不能重复消费,组间不影响 启动 RunKafka(){ cd $kafka_home nohup ./bin/zookeeper-server-start.sh ./config/zookeeper.properties >> zk$dayStr.log & echo 'Starting zookeeper...' sleep 5s #wait a monment un…

Java高级工程师面试宝典 JavaSE 多线程 进程与线程的区别? 答:进程是所有线程的集合,每一个线程是进程中的一条执行路径,线程只是一条执行路径. 为什么要用多线程? 答:提高程序效率 多线程创建方式? 答:继承Thread或Runnable 接口. 是继承Thread类好还是实现Runnable接口好? 答:Runnable接口好,因为实现了接口还可以继续继承.继承Thread类不能再继承. 你在哪里用到了多线程? 答:主要能体现到多线程提高程序效率. 举例:分批发送短信.迅雷多线程下载…

基本概念 一.安装 Redis: Remote Dictionary Server 远程字典服务 使用ANSI C语言编写.支持网络.可基于内存亦可持久化的日志型.Key-Value数据库,并提供多种语言的API. 二.启动服务 [root@node01 bin]# ls dump.rdb mkreleasehdr.sh redis-benchmark redis-check-aof redis-check-rdb redis-cli redis-server [root@node01 bin]…

一.JavaSE 1.多线程 (1).进程与线程的区别? 答:进程是所有线程的集合,每一个线程是进程中的一条执行路径,线程只是一条执行路径. (2).为什么要用多线程? 答:提高程序效率 (3).多线程创建方式? 答:继承Thread或Runnable 接口. (4).是继承Thread类好还是实现Runnable接口好? 答:Runnable接口好,因为实现了接口还可以继续继承.继承Thread类不能再继承. (5).你在哪里用到了多线程? 答:主要能体现到多线程提高程序效率. 举例:分批发送…

Redis是一个开源,先进的key-value存储,并用于构建高性能,可扩展的Web应用程序的完美解决方案. Redis从它的许多竞争继承来的三个主要特点: Redis数据库完全在内存中,使用磁盘仅用于持久性. 相比许多键值数据存储,Redis拥有一套较为丰富的数据类型. Redis可以将数据复制到任意数量的从服务器. Redis 优势 异常快速:Redis的速度非常快,每秒能执行约11万集合,每秒约81000+条记录. 支持丰富的数据类型:Redis支持最大多数开发人员已经知道像列表,集合,有…

查看某个文件属于哪个包dpkg -S add-apt-repository 包名software-properties-common命令名/usr/bin/add-apt-repository/usr/bin/apt-add-repository yum provides /usr/bin/curlrpm -qf /usr/bin/curl dpkgapt dpkg -S tcpdump dpkg -l file=rpm -qa|grep file dpkg -p tcpdumpdpkg -s…

文章来源:http://yannesposito.com/Scratch/en/blog/Learn-Vim-Progressively/   Learn Vim Progressively   TL;DR: You want to teach yourself vim (the best text editor known to human kind) in the fastest way possible. This is my way of doing it. You start by l…

-- 登录AUTHPING -- 通用命令EXISTS KEY EXPIRE KEY seconds 为给定 KEY 设置过期时间 -- 字符SET runoobkey redisDEL runoobkeyGETSET KEY VALUE -- HASHHMSET runoobkey NAME "redis tutorial" description "redis basic commands for caching" likes 20 visitors 23000…

Trying to hack Redis via HTTP requests Context Imagine than you can access a Redis server via HTTP requests. It could be because of a SSRF vulnerability or a misconfigured proxy. In both situations, all you need is to fully control at least one line…

The basic commands are the same for iperf and iperf3: SAMPLE IPERF/IPERF3 COMMANDS Server: iperf/iperf3 -s Start server on the default port iperf -s -w 32M -D / iperf3 -s -D Start server with larger TCP window, and in daemon mode iperf -i1 -u -s -p 5…

Redis hash 是一个string类型的field和value的映射表,hash特别适合用于存储对象. Redis 中每个 hash 可以存储 232 - 1 键值对(40多亿). redis 127.0.0.1:6379> HMSET w3ckey name "redis tutorial" description "redis basic commands for caching" likes 20 visitors 23000 OK redis 1…

这个叫水银的源代码管理工具尽管默默无闻,但还是得到了非常多团队的使用. 为了迎合某些团队的须要,我们也要用它来管理我们的代码. 今天的任务是先袭击学习.磨刀不误砍柴工. 对工具的掌握越快.工作的效率就会越高. 1.安装 首先从官网下载最新的版本号,我这次做个实验,下载了3.2-rc. 解压到你指定的文件夹下: [linc@localhost mercurial]$ ls mercurial-3.2-rc.tar.gz [linc@localhost mercurial]$ tar xzvf me…

Improve the performance of your network using the caching and access control capabilitiess of squid. A beginner level knowledge of Linux/Unix operating system familiarity with basic commands is all what you need.Squid runs almost on all Linux/Unix op…

http://social.msdn.microsoft.com/Forums/en-US/5482103e-272b-4c9f-bac4-be15f14782bd/cmfcmenubar-remove-expand-submenu-double-arrow-display-recently-and-all-available-menu-commands?forum=vcmfcatl You don't want the "intellegent menus" feature, som…

When you are using Linux command line frequently, using the history effectively can be a major productivity boost. In fact, once you have mastered the 15 examples that I’ve provided here, you’ll find using command line more enjoyable and fun. 1. Disp…

1.  概述 Infobright是一款基于独特的专利知识网格技术的列式数据库.Infobright简单易用,快速安装部署,使用中无需复杂操作,能大幅度减少管理工作:在应对50TB甚至更多数据量进行多并发复杂查询时,更能够显示出令人惊叹的速度.相比于MySQL,其查询速度提升了数倍甚至数十倍,在同类产品中单机性能处于领先地位.为企业剧增的数据规模.增长的客户需求以及较高的用户期望提供了全面的解决方案. Infobright是开源的MySQL数据仓库解决方案,引入了列存储方案,高强度的数据压缩,优…

原文地址: http://www.javaworld.com/article/2077445/testing-debugging/debug-with-jdb.html Q: How do you use jdb (included in the JDK 1.2 package) effectively to debug Java programs? I've tried many times, but I am successful only in loading a class file t…

Redis hash 是一个string类型的field和value的映射表,hash特别适合用于存储对象. Redis 中每个 hash 可以存储 232 - 1 键值对(40多亿). 实例 redis 127.0.0.1:6379> HMSET w3ckey name "redis tutorial" description "redis basic commands for caching" likes 20 visitors 23000 OK redi…

Views Views are the visual side of the Nova, they are the HTML output of the pages. Views can be located directly inside the views folder or in a sub folder, this helps with organising your views. Views are called from controllers once called they ac…

原文链接:http://aadrake.com/command-line-tools-can-be-235x-faster-than-your-hadoop-cluster.html Introduction As I was browsing the web and catching up on some sites I visit periodically, I found a cool article from Tom Haydenabout using Amazon Elastic Ma…