1-1-2

ip add
vi /etc/sysconfig/network-scripts/ifcfg-ens33

TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=ens33
UUID=7b633a9b-167e-4ebb-8dc4-37af6bcc3054
DEVICE=ens33
ONBOOT=yes
IPADDR=192.168.126.120
NETMASK=255.255.255.0
GATEWAY=192.168.126.2
DNS1=119.29.29.29

systemctl restart network.service

hostnamectl set-hostname node02
hostname

vi /etc/hosts

192.168.126.120 node02

systemctl status firewalld

vi /etc/sysconfig/selinux

# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#     enforcing - SELinux security policy is enforced.
#     permissive - SELinux prints warnings instead of enforcing.
#     disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of three two values:
#     targeted - Targeted processes are protected,
#     minimum - Modification of targeted policy. Only selected processes are protected.
#     mls - Multi Level Security protection.
SELINUXTYPE=targeted

vi hadoop-env.sh

export JAVA_HOME=/export/server/jdk1.8

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//core-site.xml：

<property>
        <name>fs.defaultFS</name>
        <value>hdfs://node02:9000</value>             
</property>


<property>
        <name>hadoop.tmp.dir</name>
        <value>/export/server/hadoop-2.7.2/tmp</value>
</property>


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//hdfs-site.xml：

<property>
        <name>dfs.replication</name>
        <value>1</value>
</property>

<property>
        <name>dfs.namenode.secondary.http-address</name>
        <value>node02:50090</value>
</property>


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//mapred-site.xml：

<property>
        <name>mapreduce.framework.name</name>
        <value>yarn</value>
</property>


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//yarn-site.xml：

<property>
        <name>yarn.resourcemanager.hostname</name>
        <value>node02</value>
</property>

<property>
        <name>yarn.nodemanager.aux-services</name>
        <value>mapreduce_shuffle</value>
</property>

hdfs namenode -format

start-dfs.sh
start-yarn.sh

stop-dfs.sh
stop-yarn.sh

date
rm -rf /root/.ssh
ssh-keygen -t rsa
cd /root/.ssh
.ssh里有id_rsa和.pub两个文件

在各节点的.ssh目录下
ssh-copy-id node02

在node02的.ssh上查看

more authorized_keys