centos7下忘记mysql5.7密码

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才装完的mysql,转眼密码就忘记了,找了一圈的修改密码方法,做下记录!

  1. 编辑mysql配置文件。
[[email protected] ~]# vi /etc/my.cnf
  1. [mysqld]配置节下新增skip-grant-tables
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html

[mysqld]
#
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
#
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
#
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock

skip-grant-tables

# Disabling symbolic-links is recommended to prevent assorted security risks
"/etc/my.cnf" 29L, 979C written
  1. 保存配置文件后,重启mysql服务。
[[email protected] ~]# systemctl restart mysqld.service
  1. 使用mysql命令登录mysql数据库。
[[email protected] ~]# mysql
  1. 使用下面语句修改root密码,注意和之前版本的mysql语句不太一样。

    mysql>update mysql.user set authentication_string=password(‘新密码‘) where user=‘root‘ ;
    mysql>flush privileges ;
    mysql>quit
  2. 编辑mysql配置文件,将之前添加的skip-grant-tables去掉。
  3. 重启mysql服务。

[[email protected] ~]# systemctl restart mysqld.service

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