root密码丢失，我们需要将mysql以不检查权限的方式重新启动。
在mysql的配置文件(/etc/my.cnf)中，[mysqld]下添加一句skip-grant-tables，然后重新启动服务，就可以通过无密码的方式登录。
通过select password(new password);可以查询到加密后的密码，将它替换原来的密码，我们就可以通过新的密码进行操作了。
代码如下
vim /etc/my.cnf [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/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 skip-grant-tables [mysqld_safe] log-error=/var/log/mariadb/mariadb.log pid-file=/var/run/mariadb/mariadb.pid # # include all files from the config directory # !includedir /etc/my.cnf.d systemctl restart mariadb mysql -u root -p Enter password: (按enter键进入) use mysql update user set Password = password('000000') where user = 'root' \q vim /etc/my.cnf 删除掉skip-grant-tables systemctl restart maridb mysql -u root -p Enter password:000000
