工作中很多软件和工具需要依赖java环境，JDK作为java的开发环境，是经常需要安装的。

下载JDK二进制包

官方下载地址：http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
选择需要的jdk版本，下载就好，这里下载jdk-8u144-linux-x64.tar.gz

解压到指定目录

tar zxvf jdk-8u144-linux-x64.tar.gz -C /usr/local/
ln -s /usr/local/jdk-8u144-linux-x64 /usr/local/java

设置java环境变量

export JAVA_HOME=/usr/local/java
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$JAVA_HOME/bin:$PATH

验证

[root@mysql-amoeba ~]# source /etc/profile
[root@mysql-amoeba ~]# java -version
java version "1.8.0_144"
Java(TM) SE Runtime Environment (build 1.8.0_144-b01)
Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode)

tomcat 安装

tomcat下载链接https://mirrors.cnnic.cn/apache/tomcat/tomcat-8/v8.5.20/bin/apache-tomcat-8.5.20.tar.gz

解压安装

tar zxvf apache-tomcat-8.5.20.tar.gz -C /usr/local/
ln -sv /usr/local/apache-tomcat-8.5.20/ /usr/local/tomcat

基本命令

启动
/usr/local/tomcat/bin/startup.sh或/usr/local/tomcat/bin/catalina.sh run

关闭
/usr/local/tomcat/bin/shutdown.sh或/usr/local/tomcat/bin/catalina.sh stop