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Ubuntu でSSHホスト鍵を作り直す

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概要

  • 仮想マシンのコピーやテンプレートからのデプロイを行った時など、SSHホスト鍵を作り直したい時がある。

環境

  • Ubuntu 16.04.5 LTS

手順

  • まず消す
~/
# rm /etc/ssh/ssh_host_*key*
  • dpkg-reconfigureを使うと楽に作れる。
    • デフォルトで生成されるのはRSA,DSA,ECDSA,ED25519の4種。
~/
# dpkg-reconfigure openssh-server
  • 終わり。
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