这里写一个重置linux mysql 数据库的一套操作，非必要条件下，建议不要使用，或者使用前请做好数据备份，或者请深入研究mysql避免这样的操作。

删除 mysql 根目录下的data 文件夹下的所有数据，重置MySQL

  612  rm -rf ./*
  613  cd ..
  615  cd bin/
  617  mysqld --initialize --user=mysql
  618  mysql_ssl_rsa_setup
  619  cp support-files/mysql.server /etc/init.d/mysql
  620  cd ..
  622  cp support-files/mysql.server /etc/init.d/mysql
  623  chkconfig --add mysql
  624  source /etc/profile
  625  service mysql start
  626  mysql -u root -p

其他的如修改密码，请参考我的另一篇博文：https://blog.csdn.net/shunzi2016/article/details/9052223

另外附上基础简单的linux  mysql 的my.cof

[client]
port=3306 # 设置mysql客户端连接服务端时默认使用的端口

default-character-set=utf8
socket=/data/soft/mysql-8.0.12-el7-x86_64/data/mysql.sock



[mysqld]

basedir=/data/soft/mysql-8.0.16-linux-glibc2.12-x86_64 # 设置mysql的安装目录
datadir=/data/soft/mysql-8.0.16-linux-glibc2.12-x86_64/data

socket=/data/soft/mysql-8.0.16-linux-glibc2.12-x86_64/data/mysql.sock

# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

# Settings user and group are ignored when systemd is used.
# If you need to run mysqld under a different user or group,
# customize your systemd unit file for mariadb according to the
# instructions in http://fedoraproject.org/wiki/Systemd

[mysqld_safe]
log-error=/data/log/mysql-log/error.log
pid-file=/data/soft/mysql-8.0.16-linux-glibc2.12-x86_64/data/mysql.pid

#
# include all files from the config directory
#
!includedir /etc/my.cnf.d