linux开机禁止启动防火墙,CentOS 7.0默认使用的是firewall禁止firewall开机启动,查看防火墙状态...

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firewallsystemctl 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

安装hadoop

下载安装包

hadoop-26.5.tar.gzcd /usr/

mv /software/hadoop-2.6.5.tar.gz ./

解压

tar -xzvf ./hadoop-2.6.5.tar.gz

创建目录

namenode目录：/data/hadoop/namenode

data目录： /data/hadoop/data

tmp目录： /data/hadoop/tmp

mkdir -p /data/hadoop/namenode

配制

core-site.xml

hdfs-site.xml

mapred-site.xml.template mapred-site.xml

cp mapred-site.xml.template mapred-site.xml

yarn-site.xml

slaves (slave1,slave2)

masters (master)

hadoop-env.sh

export JAVA_HOME=/usr/java/jdk1.8.0_161

将master的配制copy到slave1、slave2

scp -r ./* root@slave1:/software/hadoop-2.6.5/etc/hadoop/

格式化

cd hadoop-2.6.5/bin

./hdfs namenode -format

启动

cd ../sbin/

./start-dfs.sh

ssh-copy-id root@master

jps(检查一下)

./start-yarn.sh

cd ../bin

hadoop fs -ls /

hadoop fs -mkdir /user

/software/hadoop-2.6.5/bin

vi/etc/profile

export HADOOP_HOME=/software/hadoop-2.6.5

export PATH=$JAVA_HOME/bin:$HADOOP_HOME/bin:$PATH

source /etc/profile

hadoop fs -put /software/hadoop-2.6.5.tar.gz /user

测试2：

cd share/hadoop/mapreduce

hadoop jar ./hadoop-mapreduce-examples-2.6.5.jar pi 5 10

192.168.1.100:50070

192.168.1.100:8088

修改ssh端口

vim /etc/ssh/sshd_config

设置ntp时间同步服务

1、安装ntp

yum install -y ntp

2、设置NTP服务开机启动

chkconfig ntpd on

service nptd start