Wednesday, August 17, 2011

Passwordless ssh access using putty

As we know ssh allow authentication using private/public key. Today i was accessing my linux system from windows by giving username and password and i decided to access using key. I followed following steps for that ,As we know putty is most popular windows ssh client. First of all i downloaded puTTygen and putty software from Then i executed puttygen to generate private and public keys . I saved my public key file as and private key file as vishesh.ppk.

Now public file has to be transferred on linux system, after transfer i written following line on linux system to import public key into authorized key

root#ssh-keygen -i -f >>/root/.ssh/authorized_key

Now my ssh server is ready to accept private key for authentication.

Finally i executed putty and specify following parameters

IP address of linux box

default userrname as 'root'

and location of private key file.

And linux box get connected without asking password