CentOS 7.0默认使用的是firewall作为防火墙
查看防火墙状态
firewall-cmd --state
停止firewall
systemctl stop firewalld.service
禁止firewall开机启动
systemctl disable firewalld.service
关闭selinux
进入到/etc/selinux/config文件
vi /etc/selinux/config
将SELINUX=enforcing改为SELINUX=disabled
配制免密登录的命令
ssh-keygen -t rsa
ssh-copy-id root@master
scp -P 22 /Users/che/Downloads/jdk-8u161-linux-x64.rpm root@192.168.1.100:/software/
安装: yum install -y jdk-8u161-linux-x64.rpm
设置环境变量
cd /usr/java/
/usr/java/jdk1.8.0_161
vi /etc/profile
export JAVA_HOME=/usr/java/jdk1.8.0_161
export PATH=$JAVA_HOME/bin:$PATH