[root@node1 ~]# java -version
openjdk version "1.8.0_232"
OpenJDK Runtime Environment (build 1.8.0_232-b09)
OpenJDK 64-Bit Server VM (build 25.232-b09, mixed mode)
查看java是否可用：javac
[root@node1 ~]# javac
-bash: javac: command not found
错误原因：默认安装完只有运行环境，java安装目录下只有jre文件夹
5、安装开发环境
yum install java-1.8.0-openjdk-devel.x86_64
安装完可看到java安装目录下出现bin、lib等文件夹:
6、再次输入javac验证是否成功
[root@node1 ~]# javac
Usage: javac where possible options include:
-g Generate all debugging info
-g:none Generate no debugging info
-g:{lines,vars,source} Generate only some debugging info
-nowarn Generate no warnings
-verbose Output messages about what the compiler is doing
-deprecation Output source locations where deprecated APIs are used
-classpath Specify where to find user class files and annotation processors
-cp Specify where to find user class files and annotation processors
-sourcepath Specify where to find input source files
-bootclasspath Override location of bootstrap class files
-extdirs Override location of installed extensions
-endorseddirs Override location of endorsed standards path
-proc:{none,only} Control whether annotation processing and/or compilation is done.
-processor [,,...] Names of the annotation processors to run; bypasses default discovery process
-processorpath Specify where to find annotation processors
-parameters Generate metadata for reflection on method parameters
-d Specify where to place generated class files
-s Specify where to place generated source files
-h Specify where to place generated native header files
-implicit:{none,class} Specify whether or not to generate class files for implicitly referenced files
-encoding Specify character encoding used by source files
-source Provide source compatibility with specified release
-target Generate class files for specific VM version
-profile Check that API used is available in the specified profile
-version Version information
-help Print a synopsis of standard options
-Akey[=value] Options to pass to annotation processors
-X Print a synopsis of nonstandard options
-J Pass directly to the runtime system
-Werror Terminate compilation if warnings occur
@ Read options and filenames from file
Open Source Obfuscators
ProGuard
http://java-source.net/open-source/obfuscators/proguardProGuard is a free Java class file shrinker and obfuscator. It can detect and remove unused classes, fields, m
Maven简介
是什么？
Is a software project management and comprehension tool.项目管理工具
是基于POM概念(工程对象模型)
[设计重复、编码重复、文档重复、构建重复，maven最大化消除了构建的重复]
[与XP：简单、交流与反馈；测试驱动开发、十分钟构建、持续集成、富有信息的工作区]
功能：
wget http://download.redis.io/redis-stable.tar.gz
tar xvzf redis-stable.tar.gz
cd redis-stable
make
前面3步应该没有问题，主要的问题是执行make的时候，出现了异常。
异常一：
make[2]: cc: Command not found
异常原因：没有安装g
nimbus结点配置（storm.yaml）信息：
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional inf
