19 Mar'11

SSH passwordless login

On your machine

local $ ssh-keygen -t rsa

do not enter any keys, just hit Enter Enter. Next,

local $ scp ~/.ssh/id_rsa.pub
local $ rm ~/.ssh/id_rsa.pub
local $ ssh root@ipaddress

that should guide you directly to the command prompt

UPD 20.04.2014: There is a great Linux program ssh-copy-id that does exactly everything mentioned above, but in one line instead!