[root@centos128 hadoop]# ll /tmp
total 0
drwxr-xr-x. 3 root root 20 Jun 27 23:46 hadoop
drwxr-xr-x. 4 root root 31 Jun 27 23:46 hadoop-root
drwxr-xr-x. 2 root root 6 Jun 28 00:57 hsperfdata_root
drwxr-xr-x. 3 root root 21 Jun 28 00:48 Jetty_0_0_0_0_50070_hdfs____w2cu08
drwxr-xr-x. 3 root root 21 Jun 28 00:48 Jetty_0_0_0_0_50090_secondary____y6aanv
drwxr-xr-x. 3 root root 21 Jun 27 23:01 Jetty_localhost_33451_datanode____ihzion
drwxr-xr-x. 3 root root 21 Jun 28 00:19 Jetty_localhost_34384_datanode____gijfbp
drwxr-xr-x. 3 root root 21 Jun 28 00:48 Jetty_localhost_38324_datanode____wwolqv
drwxr-xr-x. 3 root root 21 Jun 27 23:49 Jetty_localhost_40770_datanode____.cx9tc5
drwxr-xr-x. 3 root root 21 Jun 27 23:59 Jetty_localhost_43407_datanode____.hgiwfx
drwxr-xr-x. 3 root root 16 Jun 9 06:34 pip-build-hv2v27iz
drwx------. 3 root root 17 Jun 28 00:27 -j5KhNK
[root@centos128 hadoop]# cd /tmp
[root@centos128 tmp]# rm -rf hsp* Jett* systemd* hadopp*
[root@centos128 tmp]# ll
total 0
drwxr-xr-x. 3 root root 20 Jun 27 23:46 hadoop
drwxr-xr-x. 4 root root 31 Jun 27 23:46 hadoop-root
drwxr-xr-x. 3 root root 16 Jun 9 06:34 pip-build-hv2v27iz
[root@centos128 tmp]# rm -rf hadoop*
[root@centos128 tmp]# ll
total 0
drwxr-xr-x. 3 root root 16 Jun 9 06:34 pip-build-hv2v27iz
重新format namenode
bin/hdfs namenode -format
sbin/
Browse the web interface for the NameNode; by default it is available at:
NameNode - http://192.168.44.128:50070/
发现有一个live nodes ,并且Datanode Information 有信息
[root@centos128 hadoop]# bin/hdfs dfs -mkdir /user
[root@centos128 hadoop]# bin/hdfs dfs -mkdir /user/root
[root@centos128 hadoop]# bin/hdfs dfs -put etc/hadoop input
没有报错,正常。下面继续操作
[root@centos128 hadoop]# bin/hdfs dfs -ls
Found 2 items
drwxr-xr-x - root supergroup 0 2017-06-28 01:05 input
drwxr-xr-x - root supergroup 0 2017-06-28 01:06 output
[root@centos128 hadoop]# bin/hdfs dfs -ls output
Found 2 items
-rw-r--r-- 1 root supergroup 0 2017-06-28 01:06 output/_SUCCESS
-rw-r--r-- 1 root supergroup 220 2017-06-28 01:06 output/part-r-00000
[root@centos128 hadoop]# bin/hdfs dfs -ls input/hadoop
ls: `input/hadoop': No such file or directory
[root@centos128 hadoop]# bin/hdfs dfs -ls input
Found 29 items
-rw-r--r-- 1 root supergroup 4942 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 1335 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 318 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 884 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 3804 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 4696 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 2490 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 2598 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 9683 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 867 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 1449 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 1657 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 21 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 620 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 3518 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 1611 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 1631 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 5546 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 13661 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 951 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 1383 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 4113 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 758 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 10 2017-06-28 01:05 input/slaves
-rw-r--r-- 1 root supergroup 2316 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 2697 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 2250 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 4567 2017-06-28 01:05 input/
-rw-r--r-- 1 root supergroup 690 2017-06-28 01:05 input/
[root@centos128 hadoop]# bin/hdfs dfs -get output output
[root@centos128 hadoop]# cat output/*
cat: output/output: Is a directory
1 dfsadmin