SSH

SSH (Secure Shell)

SSH (SSH client) is a program for logging into a remote machine and for executing commands on a remote machine.  It is intended to replace rlogin and rsh, and provide secure encrypted communications between two untrusted hosts over an insecure network. X11 connections and arbitrary TCP ports can also be forwarded over the secure channel.

Run the command

# ssh-keygen –t dsa

Then press three time enter, after press three time enter, generate two keys.

i) id-dsa = it is private key,              ii) id-dsa.pub = it is public key

Now go to client side computer and follow below steps

# mkdir /root/.ssh                           (Create a directory of .ssh in /root)

# touch authorized_keys                (Create a file in .ssh directory)

Then again go to server side and run the          

# scp /root/.ssh/id-dsa.pub root@ip add.of client:/root/.ssh/authorized_keys

Write yes and enter

            Now check firewall setting of both side server & client

            Now run the command                              

# ssh- ip add of client/ server

Ctrl+D                                              (Fire for end the session)