# ssh-keygen -t rsa Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): (何も打たずに [ENTER]) Enter passphrase (empty for no passphrase): (何も打たずに[ENTER]) Enter same passphrase again: (何も打たずに[ENTER]) Your identification has been saved in /root/.ssh/id_rsa Your public key has been saved in /root/.ssh/id_rsa.pub The key fingerprint is: :(中略) # ls -l