3:修改IP地址
root用户下vi /etc/sysconfig/network-scripts/ifcfg-ens33
我们需要修改BOOTPROTO="static"也就是将dhcp改为static
修改ONBOOT="yes" 意思是将网卡设置 为开机启用同时在文字下方添加IPADDR=192.168.0.230 #静态IP GATEWAY=192.168.0.1 #默认网关 NETMASK=255.255.255.0 #子网掩码 DNS1=192.168.0.1 #DNS 配置 DNS2=8.8.8.8 #谷歌地址重启网络服务service network restart查看我们改动后的效果ip addr4:关闭防火墙systemctl stop firewalld.service #停止firewallsystemctl disable firewalld.service #禁止firewall开机启动5:修改hostnamehostnamectl set-hostname xxxxvim /etc/hosts127.0.0.1 localhost ::1 localhost localhost6 localhost6.localdomain6192.168.0.190 testmaster192.168.0.191 testslave1192.168.0.192 testslave26：两两ssh免密码登录master上执行ssh-keygen -t rsa -P cd ~/.ssh/cat id_rsa.pub >> authorized_keys分别在slave上执行ssh-keygen -t rsa -P cd ~/.ssh/scp id_rsa.pub master:/root/.ssh/salve1在master上执行cd ~/.ssh/cat slave1>> authorized_keys cat slave2>> authorized_keys scp authorized_keys slave1:/root/.ssh/scp authorized_keys slave2:/root/.ssh/ 验证ssh免密码登录 输入命令ssh localhost(主机名) 根据提示输入“yes” 输入命令exit注销（Logout） 再次输入命令ssh localhost即可直接登录
7:复制jdk8到各节点mydata目录下（可以scp）
8:全部配置jdk环境变量vi /etc/profileexport JAVA_HOME=/mydata/jdk8export PATH=$JAVA_HOME/bin:$PATHsource /etc/profile