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my.cnf已经存在,影响安装--mysql

Found existing config file ./my.cnf on the system.

Because this file might be in use, it was not replaced,

but was used in bootstrap (unless you used --defaults-file)

and when you later start the server.

The new default config file was created as ./my-new.cnf


以上提示是在运行了

scripts/mysql_install_db --user=mysql

之后提示的,这是因为我的/usr/local/mysql/下已经有了my.cnf,将其改名,再重试,就ok了