ssh root@123.123.123.123

# 查看yum源中JDK版本
yum list java-1.8.0*

# 安装JDK1.8
yum -y install java-1.8.0-openjdk.x86_64

# 查看版本
java -version

# 下载并安装MySQL
wget http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm && \
yum -y install mysql57-community-release-el7-10.noarch.rpm && \
yum -y install mysql-community-server

# 启动 MySQL 数据库
systemctl start mysqld.service

# 查看MySQL初始密码
grep "password" /var/log/mysqld.log

# 登录数据库
mysql -uroot -p

#修改密码安全策略为低（只校验密码长度，至少8位）
>set global validate_password_policy=0;

# 修改MySQL默认密码
ALTER USER 'root'@'localhost' IDENTIFIED BY '12345678';

# 授予root用户远程管理权限
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '12345678';

# 退出数据库
exit

# 下载Tomcat压缩包
wget https://mirror.bit.edu.cn/apache/tomcat/tomcat-8/v8.5.57/bin/apache-tomcat-8.5.57.tar.gz

# 解压刚刚下载Tomcat包
tar -zxvf apache-tomcat-8.5.57.tar.gz

# 重命名
mv apache-tomcat-8.5.57 /usr/local/Tomcat8.5

# 为Tomcat授权
chmod +x /usr/local/Tomcat8.5/bin/*.sh

# 修改Tomcat默认端口号为80
sed -i 's/Connector port="8080"/Connector port="80"/' /usr/local/Tomcat8.5/conf/server.xml

# 启动Tomcat
/usr/local/Tomcat8.5/bin/./startup.sh