Yum

1. yum update
2. yum clean all

3. yum clean all

   JDK1.8

   yum install java-1.8.0-openjdk.x86_64

4. vi /etc/profile

5. set java environment

6. JAVA_HOME=/usr/lib/jvm/jre-1.8.0-openjdk.x86_64
7. PATH=$PATH:$JAVA_HOME/bin
8. CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
9. export JAVA_HOME CLASSPATH PATH

   数据库

   yum clean all 清空已安装文件 如果下载失败之后执行的
   yum install mariadb-server 安装mariadb数据库
   1. 启动命令 [root@localhost src]# systemctl start mariadb
   2. 重启命令 [root@localhost src]# systemctl restart mariadb
   3. 关闭命令 [root@localhost src]# systemctl stop mariadb
   4. 设定开机自起 [root@localhost src]# systemctl enable mariadb
   5. 关闭开机自起 [root@localhost src]# systemctl disable mariadb
   数据库初始化操作：mysql_secure_installation
   导入数据库：source 路径/名字.sql

   Redis