Очень просто — для того, чтобы без пароля ходить с server1
на server2
нужно выполнить всего две команды.
1. Если /home/user1/.ssh/id_rsa
ещё нет, то создаём пару ключей: приватный и публичный.
[user1@server1] $ ssh-keygen Generating public/private rsa key pair. Enter file in which to save the key (/home/user1/.ssh/id_rsa): Created directory '/home/user1/.ssh'. Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /home/user1/.ssh/id_rsa. Your public key has been saved in /home/user1/.ssh/id_rsa.pub. ...
2. После того, как ключи созданы, передаём публичный ключ (в нашем случае id_rsa.pub
) на удалённый сервер.
[user1@server1] $ ssh-copy-id -i ~/.ssh/id_rsa.pub user2@server2 user2@server2's password: Now try logging into the machine, with "ssh 'user2@server2'", and check in: .ssh/authorized_keys to make sure we haven't added extra keys that you weren't expecting.
3. Теперь можно зайти на сервер без пароля.
[user1@server1] $ ssh user2@server2 Last login: Tue May 22 12:25:00 2012 from server1 [user2@server2] $