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alias mysql=/usr/local/mysql/bin/mysql
alias mysqladmin=/usr/local/mysql/bin/mysqladmin

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mysqladmin -u root -p password `新密码`   #回车后输入临时密码

mysql -u root -p  #输入新密码即可命令行登录

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ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '新密码';   #即可用客户端连接