hdfs dfs -setfattr -n user.form -v http://www.baidu.com /001/mydemo/hdfs1.txt hdfs dfs -getfattr -d /001/mydemo/hdfs1.txt hdfs dfsadmin -safemode get hdfs dfsadmin -safemode enter hdfs dfsadmin -safemode leave hdfs dfsadmin -allowSnapshot /001/mydemo hdfs dfsadmin -disallowSnapshot /001/mydemo hdfs dfs -createSnapshot /001/mydemo s1 hdfs dfs -renameSnapshot /001/mydemo s1 s2 hdfs dfs -deleteSnapshot /001/mydemo s2 hdfs dfsadmin -setQuota 3 /001/mydemo3 hdfs dfsadmin -clrQuota /001/mydemo3 hdfs dfsadmin -setSpaceQuota 402653184 /001/mydemo3 hdfs dfsadmin -clrSpaceQuota /001/mydemo3 hdfs dfsadmin -report hdfs dfsadmin -printTopology hdfs fsck /user/hadoop/hadoop-2.7.3.tar.gz -files -blocks hdfs fsck /user/hadoop/hadoop-2.7.3.tar.gz -files -blocks -locations
