啟動MySQL5.7時報錯:initialize specified but the data directory has files in it. Aborting.

啟動MySQL5.7時報錯：initialize specified but the data directory has files in it. Aborting

 

 解決方法：

vim /etc/my.cnf
查看文件，尋找datadir=...
查看到：datadir=/usr/local/mysql/data, 
這個是data保存目錄。
進入/usr/local/mysql/data后，查看到確實有數據：
將/usr/local/mysql/data備份，
cd /usr/local/mysql
mv data data.bak
接着執行：
# mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data
# systemctl start mysqld