google上查到的
关闭slow shutdown，我在centos7 上输入代码
slow shutdown
发现没作用，也无效
然后，使用cd 进入 /var/lib/mysql/文件夹，
cd /var/lib/mysql
其实不用进入，我直接查找的ib_logfile0 和ib_logfile1
find / -name ib_logfile0
find / -name ib_logfile1
利用mkdir和cp命令进行备份，
mkdir backup
cp /var/lib/mysql/ib_logfile0 /backup
cp /var/lib/mysql/ib_logfile1 /backup
然后删除备份前的这两个文件，
rm /var/lib/mysql/ib_logfile0
rm /var/lib/mysql/ib_logfile0
重新运行
service mysqld start
service mysqld status -l
成功运行
之后备份了my.cnf配置，并删除
rm /etc/my.cnf
删除 /var/lib/mysql解决
[ERROR] [MY-010457] [Server] --initialize specified but the data directory has files in it. Aborting.
的提示
rm -rf /var/lib/mysql
重新运行
service mysqld start
service mysqld status -l
无警告和报错
google原文
If you have already installed MySQL and did not perform a slow shutdown using the
innodb_fast_shutdown
Flag, simply go to your MySQL directory
/var/lib/mysql/
And remove the log files (Do not do this if you need the table data in your database until you have backed up your database):
ib_logfile0 ib_logfile1
Back them up before if you need them again.