1．后台启动
启动命令

sh $HADOOP_HOME/sbin/hadoop-daemon.sh start secondarynamenode

查看启动状态命令 :jps

[root@zjj103 hadoop]# hadoop-daemon.sh start secondarynamenode
starting secondarynamenode, logging to /root/soft/hadoop-2.7.2/logs/hadoop-root-secondarynamenode-zjj103.out

查看启动状态

[root@zjj103 hadoop]# jps
44773 DataNode
45256 NodeManager
47673 Jps
47628 SecondaryNameNode

2．控制台查看保存Saving CheckPoint