ssh localhost during hadoop setup

In apache site, if you simply follow..below in ubuntu it didn't work..


https://hadoop.apache.org/docs/current2/hadoop-project-dist/hadoop-common/SingleCluster.html

Setup passphraseless ssh

Now check that you can ssh to the localhost without a passphrase:
  $ ssh localhost
If you cannot ssh to localhost without a passphrase, execute the following commands:
  $ ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa
  $ cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys
  $ chmod 0600 ~/.ssh/authorized_keys


So check for 2 things..


a) U have a SSH server installed..do it first.


b) Instead of using dsa use rsa






  $ ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa
  $ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
  $ chmod 0600 ~/.ssh/authorized_keys


















































Comments









  1. BinayakNovember 14, 2016 at 1:52 AM
    Noted...one friend was following the steps but it didn't work.
    Look at the error msgs..its always leading.
    The friend made chmod +777 to authorized_keys and hence the ssh agent was complaining on ssh-add as too generic permissions.
    Check permissions of files and directory id_rsa.
    chmod 600  ~/.ssh/authorized_keys
    ReplyDelete











Post a Comment



















Popular posts from this blog









ScoreCard Model using R





















  Example R Notebook for ScoreCard Model      One often receives mailers on pre-approved loan based on creditworthiness. When one applies for credit, often it’s approved, sometimes it isn’t...   Have you ever wondered how exactly the decision to approve a loan is done?    Was the bank able to clearly articulate the rationale of their decision to decline?   To ensure fairness and transparency, there are compliance rules which mandates Banks to have such a mechanism. The Federal Trade Commission (FTC), the nation’s(US) consumer protection agency, enforces the Equal Credit Opportunity Act (ECOA), which prohibits credit discrimination on the basis of race, color, religion, national origin, sex, marital status,age, or because you get public assistance.   In BFS, often underwriter needs to decide the creditworthiness of an applicant. Among other things, a scorecard is typically in place and long been used. Now with data deluge and better processing power many Analytical models are also u...








Read more










Zeppelin and Anaconda





















 Set Anaconda As Default Python Interpreter In Zeppelin   Click  anonymous  in top right corner.  Click  Interpreter .  Scroll down to the  python  interpreter.  Click  Edit .  Locate  zeppelin.python .  Set value to  /home/hadoop/anaconda/bin/python  Now find the  spark  interpreter.  Locate  zeppelin.pyspark.python .  Set value to  /home/hadoop/anaconda/bin/python    https://dziganto.github.io/zeppelin/spark/zeppelinhub/emr/anaconda/tensorflow/shiro/s3/theano/bootstrap%20script/EMR-From-Scratch/     This works..tested..      conda install -c calex sklearn-pandas    P.S:    zeppelin 0.7.3 don't support spark 2.3. spark 2.3 is supported by zeppelin 0.8 which will be released soon   zeppelin 0.7.3 doesn't support python 3.6..   now testing with spark 2.1 and python 3.5...so far so good..   Check::::::   zeppelin home/conf should have zeppelin-env.sh. Here you can specify spark home and zeppelin port      Starting Apach...








Read more










The auxService:mapreduce_shuffle does not exist





















  Error and Probable Fix:   1. Error : org.apache.hadoop.yarn.exceptions.InvalidAuxServiceException: The auxService:mapreduce_shuffle does not exist   Hadoop job information for Stage-1: number of mappers: 1; number of reducers: 1  2015-05-02 13:57:39,982 Stage-1 map = 0%,  reduce = 0%  2015-05-02 13:57:49,511 Stage-1 map = 100%,  reduce = 100%  Ended Job = job_1430542224940_0001 with errors  Error during job, obtaining debugging information...  Examining task ID: task_1430542224940_0001_m_000000 (and more) from job job_1430542224940_0001   Task with the most failures(4):  -----  Task ID:    task_1430542224940_0001_m_000000   URL:    http://0.0.0.0:8088/taskdetails.jsp?jobid=job_1430542224940_0001&tipid=task_1430542224940_0001_m_000000  -----  Diagnostic Messages for this Task:  Container launch failed for container_1430542224940_0001_01_000005 : org.apache.hadoop.yarn.exceptions.InvalidAuxServiceException: The auxService:mapreduce_shuffle does not exist   at sun...








Read more