apt-get install ssh
Running ssh-keygen as root will install the host keys, ssh-keygen as <user> the keypair into directory ~/.ssh. The private key file, e.g. ~/.ssh/id_rsa needs to be copied to all clients which need access to the server, the public key file, e.g. ~/.ssh/id_rsa.pub, needs to be added to the authorized_keys file of the server to allow access to the server. In addition, you should adjust the access rights for the different files and directories. As <user>, enter the following commands
On the client:
ssh-keygen ssh -vvv -p <port#> <servername> // check the ssh connection sftp -oPort=<port#> <servername> // transfer the public key file sftp > put client_id_rsa.pub
On the server:
sudo cat client_id_rsa.pub >> ~/.ssh/authorized_keys
Make sure permissions and ownership are set correctly:
sudo chmod 700 ~/.ssh sudo chmod 600 ~/.ssh/* sudo chown -R user:user ~/.ssh
Check the ssh access:
ssh <servername> whoami // needs to return the username under which the ssh access was established, e.g. user1 ssh -l root <servername> whoami // needs to return "root", as this establishes the ssh access as root, not as user1 ssh -vvv -p <port#> -l root <servername> whoami // same as above, but use different port number with full debug verbose output
Important
You might need to include the user in sshd.conf to authorize access.