启动hadoop

[root@chen1 ~]# hadoop-daemon.sh start namenode
starting namenode, logging to /data/app/hadoop-2.7.2/logs/hadoop-root-namenode-chen1.out
[root@chen1 ~]# hadoop-daemon.sh start datanode
starting datanode, logging to /data/app/hadoop-2.7.2/logs/hadoop-root-datanode-chen1.out
[root@chen1 ~]# yarn-daemon.sh start resourcemanager
starting resourcemanager, logging to /data/app/hadoop-2.7.2/logs/yarn-root-resourcemanager-chen1.out
[root@chen1 ~]# yarn-daemon.sh start nodemanager
starting nodemanager, logging to /data/app/hadoop-2.7.2/logs/yarn-root-nodemanager-chen1.out
[root@chen1 ~]# mr-jobhistory-daemon.sh start historyserver
starting historyserver, logging to /data/app/hadoop-2.7.2/logs/mapred-root-historyserver-chen1.out
[root@chen1 ~]# jps
18864 DataNode
19424 Jps
18773 NameNode
19221 NodeManager
19383 JobHistoryServer
18971 ResourceManager

1. 启动namenode
2. 启动datanode
3. 启动nodemanager
4. 启动resourcemanager
5. 启动historyserver