620 cd $HADOOP_HOME
621 cd sbin/
622 start-dfs.sh
623 start-yarn.sh
624 jps
625 stop-dfs.sh
626 ssh-keygen -t rsa
627 ssh-copy-id whj
628 ssh whj
629 stop-dfs.sh
630 jps
631 jps -mvl
632 jps -mv
633 jps -ml
634 start-dfs.sh
635 jps
636 cat /home/whj/hadoop-2.7.6/logs/hadoop-whj-datanode-whj.log
637 ifconfig
638 cat /etc/hosts
639 sudo vi /etc/hosts
640 stop-dfs.sh
641 start-dfs.sh
642 jps
643 cat /home/whj/hadoop-2.7.6/logs/hadoop-whj-datanode-whj.log
644 telnet
645 telnet 127.0.0.1 9000
646 cat /home/whj/hadoop-2.7.6/logs/hadoop-whj-datanode-whj.log
647 cd /home/whj/hadoop-2.7.6/tmp/dfs/
648 ll
649 rm -rf *
650 ll
651 jps
652 kill -9 12149
653 kill -9 12585
654 jps
655 hdfs namenode -format
656 ll
657 start-dfs.sh
658 jps
659 history
660 history >>/home/whj/桌面/log
解决的历史命令
原因是namenode和datanode不同步
成功后是这个样子