常用命令（自己备用）

#开启hdfs和yarn

cd /opt/modules/hadoop-2.6.0-cdh5.9.0/sbin

./start-all.sh

#开启zookeeper

cd /opt/modules/zookeeper-3.4.5-cdh5.9.0/bin

./zkServer.sh start

#开启hbase

cd /opt/modules/hbase-1.2.0-cdh5.9.0/bin

./start-hbase.sh

#查看mysql运行状态

service mysql status

#开启mysql

service mysql start

#关闭mysql

service mysql stop

#开启jobhistoryserver

cd /opt/modules/hadoop-2.6.0-cdh5.9.0/sbin

./mr-jobhistory-daemon.sh start historyserver

#开启spark

cd /opt/modules/spark-1.6.3-bin-hadoop2.6/sbin

./start-all.sh

#开启hiveserver2

hiveserver2

 

#安全模式状态查看

cd /opt/modules/hadoop-2.6.0-cdh5.9.0/bin

./hdfs dfsadmin-safemode get

#离开安全模式

cd /opt/modules/hadoop-2.6.0-cdh5.9.0/bin

hdfs dfsadmin -safemode leave

#centos7查看防火墙状态

firewall-cmd --state

#centos7关闭防火墙

systemctl stop firewalld.service