Set the clock on the affected system to a date before the key was expired. Example: # faketime 2019-05-01 apt update # faketime 2019-05-01 apt upgrade and so on ...
Please note that 1024-bit DSA keys are no longer considered secure. Maybe better remove the MySQL stuff and add it back later. Regards Stephan PS: This is a dirty trick. Use at your own risk.
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