View mysql running error log in linux environment

1. Enter the mysql installation directory, and then enter the data directory (this directory stores the data of the database)

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2. After entering the data directory, you can find two subdirectories: mysql test (it can be seen that mysql data storage is stored separately according to different user-defined databases) )

3. Enter the mysql directory and find the file suffix .err, which is the mysql running error log, which can be opened with the vi command for analysis.

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