1.进入目录 :cd /opt
2.新建目录 mkdir java
3.上传jdk
下载地址:https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
4.解压 :tar -zxvf jdk-8u191-linux-x64.tar.gz
5.配置环境
vim /etc/profile
添加如下内容:JAVA_HOME根据实际目录来
JAVA_HOME=/usr/java/jdk1.8.0_191
CLASSPATH=$JAVA_HOME/lib/
PATH=$PATH:$JAVA_HOME/bin
export PATH JAVA_HOME CLASSPATH
6.保存使配置生效:source /etc/profile
7.查看是否安装:java -version
java version "jdk1.8.0_191"
Java(TM) SE Runtime Environment (build jdk1.8.0_191)
Java HotSpot(TM) Client VM (build 25.60-b23, mixed mode)
8.安装tomcat(姿势同上)上传-解压-启动(一般启动无法访问,检查防火墙,端口是否开放)
9.查看防火墙状态:systemctl status firewalld
开启防火墙 systemctl start firewalld
关闭防火墙 systemctl stop firewalld
开启防火墙 service firewalld start
若遇到无法开启
先用:systemctl unmask firewalld.service
然后:systemctl start firewalld.service
10.对外开发端口查看想开的端口是否已开:firewall-cmd --query-port=6915/tcp
11.如果是no,开启端口:firewall-cmd --add-port=6915/tcp --permanent
12.查询是否开启成功;firewall-cmd --query-port=6915/tcp
13.yes
14.启动tomcat: sh startup.sh