cd /etc
cd sysconfig
cd network-scripts
找到ifcfg-ens33
service network restart
systemctl stop firewalld
systemctl disable firewalld
systemctl status firewalld
hostnamectl set-hostname master
vi /etc/hosts
在编辑里有个虚拟网络编辑器
时间同步
crontab -e
0 1 * * * /etc/sbin/ntpndate cn.pool.ntp.org
当改物理地址失败时的操作
ip addr show
systemctl stop NetworkManager
systemctl disable NetworkManager
hadoop配置流程
1静态地址服务器搭建
2jdk和hadoop安装
3 /etc/hadoop/hadoop-env，yarn-env中的java_home更改
4 core-site.xml,mapred-site.xml,yarn-size.xml,hdfs-site.xml搭建
5 ssh免密登录配置
6 关闭防火墙
yarn.resourcemanager.hostname全是master
yarn-daemon.sh start resourcemanager
hadoop-daemon.sh start datanode
hadoop dfsadmin -safemode get
hadoop dfsadmin -safemode leave
