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エラー `System has not been booted with systemd as init system (PID 1). Can't operate. Failed to connect to bus: Host is down` の対処法

Posted at

環境

  • Windows 11 Home
  • WSL2
  • Ubuntu 20.04.4 LTS

エラー

こちらのサイトを参考に、UbuntuにDockerをインストールしようとしたところ、手順の途中でエラーが出る。

sudo systemctl daemon-reload
~~ 省略 ~~
System has not been booted with systemd as init system (PID 1). Can't operate. Failed to connect to bus: Host is down

解決策

  1. 以下のGitHubから、systemd-genie.debをダウンロード
    https://github.com/arkane-systems/genie/releases/tag/1.26
    2.png

  2. ダウンロードしたファイルを、Linux上の/home/<username>に移す
    タイトルなし.png

  3. 以下のコマンド2つを実行

    sudo apt-get update; \
    sudo apt-get install -y apt-transport-https && \
    sudo apt-get update && \
    sudo apt-get install -y aspnetcore-runtime-3.1
    
    sudo dpkg -i systemd-genie.deb
    
  4. 以下のコマンドを実行し、エラーが出なければ完了

    genie -s
    
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