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Continue to ChatRaspberry Pi 3B+のRaspbian JessieからStretchへのアップグレード https://servercan.net/blog/2022/01/raspberry-pi-3b%e3%81%aeraspbian-jessie%e3%81%8b%e3%82%89stretch%e3%81%b8%e3%81%ae%e3%82%a2%e3%83%83%e3%83%97%e3%82%b0%e3%83%ac%e3%83%bc%e3%83%89/