【Hadoop】 2.7.3版本 hdfs 命令列使用
阿新 • • 發佈：2019-01-08
1.檢視HDFS下目錄結構及檔案
[email protected]:~$ hdfs dfs -ls -R /[email protected]:~$ hdfs dfs -mkdir /tmp[email protected]:~$ hdfs dfs -put a.txt /inputFile[email protected]:~$ hdfs dfs -ls /tmp5.檢視/inputFile/a.txt檔案內容
6.刪除/tmp目錄[email protected]:~$ hdfs dfs -cat /inputFile/a.txt Not Support zh_CN.UTF-8 cannot output Chinese LANGUAGE
[email protected]:~$ hdfs dfs -rm /tmp
rm: `/tmp': Is a directory
[email protected]:~$ hdfs dfs -rm -r /tmp
17/02/25 19:38:25 INFO fs.TrashPolicyDefault: Namenode trash configuration: Deletion interval = 0 minutes, Emptier interval = 0 minutes.
Deleted /tmp7.檢視HDFS狀態
8.離開或進入安全模式[email protected]:~$ hdfs dfsadmin -report Configured Capacity: 14662287360 (13.66 GB) Present Capacity: 7529889792 (7.01 GB) DFS Remaining: 7529844736 (7.01 GB) DFS Used: 45056 (44 KB) DFS Used%: 0.00% Under replicated blocks: 0 Blocks with corrupt replicas: 0 Missing blocks: 0 Missing blocks (with replication factor 1): 0 ------------------------------------------------- Live datanodes (1): Name: 127.0.0.1:50010 (localhost) Hostname: localhost Decommission Status : Normal Configured Capacity: 14662287360 (13.66 GB) DFS Used: 45056 (44 KB) Non DFS Used: 7132397568 (6.64 GB) DFS Remaining: 7529844736 (7.01 GB) DFS Used%: 0.00% DFS Remaining%: 51.36% Configured Cache Capacity: 0 (0 B) Cache Used: 0 (0 B) Cache Remaining: 0 (0 B) Cache Used%: 100.00% Cache Remaining%: 0.00% Xceivers: 1 Last contact: Sat Feb 25 19:41:39 PST 2017
[email protected]:~$ hdfs dfsadmin -safemode leave
Safe mode is OFF
[email protected]:~$ hdfs dfsadmin -safemode enter
Safe mode is ON