Reusing OpenSSH connections to the same host
http://www.revsys.com/writings/quicktips/ssh-faster-connections.html
SSH コネクションを再利用しようというお話。
I recently learned of a new OpenSSH feature that I’ve wanted for years, the ability to reuse the already existing connection to a remote host when I want to open subsequent connections.
おおー、ホントだ。openssh の 4.x から使えるみたい。
当然なんだけど ssh 秘密鍵のパスフレーズを入力する必要がなくて ssh-agent を使っている感じでリモートホストにログインできる。
また、ハンドシェイクしなくて良い分こちらの方が断然早い。
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