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2011-09-27

how-to setup public private key authentication between an Win and Nix box

  1. Install Cygwin
  2. Install separately the ssh-keygen ( or sshd )
  3. Download the puttycfg , unzip to a dir in your Windows path
  4. Find out where cygwin1.dll is installed cygcheck -sd >list.txt
  5. Open the list.txt ( it is quite big ) : notepad list.txt 
  6. Copy all the files from   C:\temp\something  to the dir where the cygwin1.dll is located 
  7. Start the putty.exe : Start - Run : cmd /c START  /max putty
  8. In the GUI , check that Session on the Left is selected , click on Cygterm option , for hostName type - , leave port number 22
  9. Open the puttycfg : 
  10. Generate the public and private key's : 
  11. # ssh-keygen -t rsa
  12. Type Enter,Enter
  13. Now here is the tricky part you have to tell also putty that the public and private key files are the one you want to use with you : Copy the /home/<<username>>/id_rsa and ..id_rsa.pub to the dir where your save your putty conf in my case: C:\Temp\ysg\conf\<<computername>>\putty\ssh
  14. Start - Run - type puttygen 
  15. Load the copied private key file and save it as <<file.pkk>> , save also the public key file 
  16. Copy the id_rsa.pub file to the server's ~ dir
  17. On the server cat id_rsa.pub >> ~/.ssh/authorized_keys
  18. Now when started from the windows client  :
  19. cmd /c START  /max putty  username@servername.domain.com no password should be asked 

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