There are two machines A and B. The idea is to login (via ssh) from A to B without typing the password that machine B would normally ask for. A is called the client and B is called the server. A single command on the client A does this (replace SERVERB by the correct machine name or IP address of server B ): Code: ssh-keygen -t dsa -f ~/.ssh/identity && cat ~/.ssh/identity.pub | ssh SERVERB 'sh -c "cat - >>~/.ssh/authorized_keys2 && chmod 600 ~/.ssh/authorized_keys2"' Press enter twice. Then it will ask you for password when u run this command but this will be the last time it will ask. After this, you can jump to step 4 below. Generate your public and private keys on client A, by running: Code: ssh-keygen -t dsa -f ~/.ssh/mykey Just hit enter twice for the passphrase query. Next, copy your public key on client A to Server B. Run the command: Code: cat ~/.ssh/mykey.pub | ssh SERVERB 'sh -c "cat - >>~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys"' It will ask you for your password. Don't worry, this is the last time you will have to type it in. This puts your public key on server B, in a special file that holds trusted public keys, and gives it appropriate permissions so that its readable by you only. Move your private key to a file ssh looks for by default and make it secret by running this on client A: Code: mv ~/.ssh/mykey ~/.ssh/identity && chmod 600 ~/.ssh/identity Since this file is like your password, it must be readable by you only. You are all set. Now run: Code: ssh SERVERB And server B should let you login without password.