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Cannot connect to the Docker daemonの一時対応方法

Last updated at Posted at 2021-07-17

問題

dockerコマンドを実行すると、下記のエラーが出ている:

~$ docker container list
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

ネットで調べた方法で試したけど、解決出来なかった。

対応方法

新規ターミナルでsudo dockerdで実行したままの状態で、別のターミナルでdockerコマンドを実行できるようになった。

その後

何日後、Ubuntu 18.04が壊れて(startupでcrashして、進まなくなった。Cannot start Network Managerみたいなエラー)、再インストールした。またすぐUbuntu 20.04にupgradeした。

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