mysql root密码忘记
1、启动时加上下面参数:
--skip-grant-tables
/etc/rc.d/init.d/mysqld start --skip-grant-tables
2、操作my.conf,增加下面参数
[root@host]# cat /etc/my.cnf | grep -v '^$' | grep -v "^#"
[mysqld]
skip-grant-tables
重启mysql服务就可以登录mysql了。
查看mysql的用户授权:
mysql> select user,host from mysql.user;
+--------+------+
| user | host |
+--------+------+
| gitlab | % |
| root | % |
+--------+------+
2 rows in set (0.00 sec)
删除空用户:
delete from mysq.user where user='';
删除test库:
drop database test;
修改mysql密码报错:
mysql> update user set password=password(‘redhat’) where user='root';
ERROR 1054 (42S22): Unknown column 'password' in 'field list'
正确改密码语句:
mysql> update user set authentication_string=password('redhat') where user='root';
Query OK, 1 row affected, 1 warning (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 1
报错原因:
mysql> select version();
+------------+
| version() |
+------------+
| 5.7.24-log |
+------------+
1 row in set (0.00 sec)
想要查看数据库中用户信息,结果报错没有password这个字段了。原来在mysql5.7及以上的版本里面,password这个字段已经被authentication_string取代。
mysql> desc user;