Passwordless SSH authorization — Cloudera VMware using Windows(PuTTY)

Hi,

Are you looking for the Passwordless SSH solution, to connect Cloudera(Linux) remote server or VMware — Guest OS using SSH authorization from Windows(host OS). PuTTY, is our go to solution.

Tools : PuTTY, PuTTYgen, VMware, Cloudera VM

PuTTY and PuTTYgen

Download 32-bit or 64-bit version based on your operation system version.

Click here : Download PuTTY

Install PuTTY by running putty-****.msi

To open PuTTYgen, go to Windows -> Start Menu -> Find “PuTTY” Directory.

• Open “PuTTYgen”
• Check the parameters with these details:
  Type of key to generate = RSA
  Number of bits in a generated key = 4096
• Click on “Generate” which generates Private/Public Key

Make random movement on blank area to complete this key generation process quickly.

• Click on “Save Public Key” and save file with Public_key.txt [select All files option while saving file]
• Click on “Save Private Key” and save file as Private_key.ppk [select type .ppk while saving file]

To open PuTTY, go to Windows -> Start Menu -> Find “PuTTY” Directory

• Open “PuTTY”
• Keep PuTTY configuration open,
• Go to VMware (Cloudera) window :
• Open Terminal in Cloudera/Linux OS :
• type command : ifconfig
• copy “inet addr” e.g. 192.168.*.*
• Come back to puTTY Configuration:
• In the sessions section, fill Host Name with “cloudera@<copied inet addr>” with port 22
• Find Auth where we are going to add private key(Private_key.ppk)
• connection option in Left side menu -> SSH -> Auth
• Browse and add Private_key.ppk file
• Go back to Session in Left side menu
• Give name “Cloudera_pwless” in Saved_Sessions then click on Save
• Select “Cloudera_pwless” and click on Load
• Click Open : It will ask for password for cloudera user : Type password : cloudera
• create ~/.ssh directory
  > mkdir ~/.ssh
• create file with name authorized_keys
  > touch ~/.ssh/authorized_keys
• open file authorized_keys
  now, copy generated public key from PuTTYgen and paste into this file
• change permission of .ssh
  > chmod 700 ~/.ssh
• change permission of ~/.ssh/authorized_keys
  > chmod 600 ~/.ssh/authorized_keys
• change permission of cloudera user home directory
  > chmod 740 ~
• Cheers!, you are ready to work with passwordless authorization. Open Putty -> Select “Cloudera_pwless” Saved Sessions. Click on Open.
  
  Note :
  Troubleshoot steps:
• If you need to restart sshd servic forcefully
  Cloudera Terminal :
  > sudo service sshd restart

This my first blog. If you have any suggestion, feel free to send your feedback. I will try to improve my skills.