95.更改MySQL的root用户密码,MySQL基本操作的常用命令
# mysqladmin -uroot password '123456' //在实际生产环境中请勿设置如此简单的密码 Warning: Using a password on the command line interface can be insecure.# mysqladmin -uroot password '123456'
Warning: Using a password on the command line interface can be insecure.
# mysql -uroot //设置好密码之后，再次使用之前的登录密令就报错了
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
# mysql -uroot -p123456 //输入密码后再登录，-p选项后面直接跟密码，不能有空格
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.Commands end with ; or \g.
Your MySQL connection> Server version: 5.6.36 MySQL Community Server (GPL)
Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> quit
Bye
# mysql -uroot -p //-p后面不加密码，以交互的形式输入密码
Enter password:
Welcome to the MySQL monitor.Commands end with ; or \g.
Your MySQL connection> Server version: 5.6.36 MySQL Community Server (GPL)
Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> exit
Bye
# mysqladmin -uroot -p123456 password 'sdwaqw' //修改密码
Warning: Using a password on the command line interface can be insecure.
# mysql -uroot -psdwaqw //使用新密码登录
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.Commands end with ; or \g.
Your MySQL connection> Server version: 5.6.36 MySQL Community Server (GPL)
Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
4、忘记root密码时的操作
# vim /etc/my.cnf
# For advice on how to change settings please see# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the# *** default location during install, and will be replaced if you# *** upgrade to a newer version of MySQL.
skip-grant //在下加入该字段
# /etc/init.d/mysqld restart //重启mysql
Shutting down MySQL.. SUCCESS!
Starting MySQL. SUCCESS!
# mysql -uroot //现在就无需密码了
Welcome to the MySQL monitor.Commands end with ; or \g.
Your MySQL connection> Server version: 5.6.36 MySQL Community Server (GPL)
Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> use mysql; //切换数据库
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> update user set password=password('sdwaqw123456') where user='root'; //更新密码
Query OK, 4 rows affected (0.00 sec)
Rows matched: 4Changed: 4Warnings: 0
mysql> exit
Bye
# vim /etc/my.cnf //删除skip-grant字段
# /etc/init.d/mysqld restart //重启
Shutting down MySQL.. SUCCESS!
Starting MySQL. SUCCESS!
# mysql -uroot //无法登陆了
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
# mysql -uroot -psdwaqw123456 //使用新密码登录
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.Commands end with ; or \g.
Your MySQL connection> Server version: 5.6.36 MySQL Community Server (GPL)
Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> exit
Bye
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