How to Use Help Command in HDFS

-
Sometimes as a Hadoop developer it is difficult to remember all the Hadoop commands. The HELP command useful to know the correct syntax.

----

How to List all HDFS Commands

hadoop
hadoop fs   ==> Enter

This will list all Hadoop commands.

Help Command in HDFS

Hadoop commands are the flavor of UNIX. If you want to see each Command description, you can go for Hadoop help command. You can use the below command for help.

hadoop fs -hlep ls 

Deleting a File in Hadoop HDFS

The below command helps   how to delete a file from Hadop cluster.

hadoop fs -rm exmaple.txt

Comments

Post a Comment

Thanks for your message. We will get back you.

Popular posts from this blog

Hyperledger Fabric: 20 Real Interview Questions

-
Image
I am practicing Hyperledger. This is one of the top listed blockchains. This architecture follows R3 Corda specifications. Sharing the interview questions with you that I have prepared for my interview. Though Ethereum leads in the real-time applications. The latest Hyperledger version is now ready for production applications. It has now become stable for production applications. The Hyperledger now backed by IBM. But, it is still an open source. These interview questions help you to read quickly. The below set of interview questions help you like a tutorial on Hyperledger fabric. Hyperledger Fabric Interview Questions 1). What are Nodes? In Hyperledger the communication entities are called Nodes. 2). What are the three different types of Nodes? - Client Node - Peer Node - Order Node The Client node initiates transactions. The peer node commits the transaction. The order node guarantees the delivery. 3). What is Channel? A channel in Hyperledger is the subnet of
Read more

How to Fix Python Syntax Errors Quickly

-
Image
In Python, you can call parsing errors Syntax errors. How to fix the syntax errors quickly, I can show in this post. Also, check Python Syntax Errors Cheat Sheet. What is Python Syntax Error? If you run the Python code, the interpreter first parses the logic. If any errors found, it is the developer's responsibility to fix them. Courtesy: Python documentation. >>> while True print ( 'Hello world' ) File "<stdin>" , line 1 while True print ( 'Hello world' ) ^ SyntaxError : invalid syntax How to Fix the Syntax Error? First, check for the line number. In the above case, it is '1'. Then look for the symbol '^'. The issue is at the PRINT function. The reason is before the PRINT function you need a colon ':'. That is the reason, you are getting error. This is a syntax error. Find below the corrected logic: >>> while True : print ( 'Hello world' ) File "<stdin
Read more

5 Super SEO Blogger Tools

-
Image
I have explained super free blogger SEO tools that every blogger needs. These tools simplify your effort to write SEO -friendly blog posts. These five free blogger SEO tools make your blog post wonders in google search. And, indexing of your post also faster. ... Blogger Tool #1: Headline Analyzer The best tool is the EMV Headline Analyzer . When you enter the headline, it analyzes and gives you EMV ranking. When you get '50' or above to that, it appears quickly in Google search. Blogger Tool #2: Headline Length Checker The usual headline length is 50 to 60 characters. Beyond that, the headline will get truncated and looks ugly for search engine users.  The SERP Snippet Optimization  Tool useful to know how it appears in the search results. Blogger Tool #3: Free Submission to Search Engines The tool  Ping-O-Matic  is a free submission tool. After your blog post, you can submit your feed to Ping-O-Matic. It does submit to search engines freely. Blogger Tool #4: Spell and Gra
Read more