一、拥有原来的myql的root的密码
方法一：
在mysql系统外，使用mysqladmin
# mysqladmin -u root -p password "test123"
Enter password: 【输入原来的密码】
方法二：
通过登录mysql系统，
# mysql -uroot -p
Enter password: 【输入原来的密码】
mysql>use mysql;
mysql> update user set password=passworD("test") where user='root';
mysql> flush privileges;
mysql> exit;
二、忘记原来的myql的root的密码：
首先，你必须要有操作系统的root权限了。要是连系统的root权限都没有的话，先考虑root系统再走下面的步骤。
类似于安全模式登录系统，有人建议说是pkill mysql，但是我不建议哈。因为当你执行了这个命令后，会导致这样的状况：
/etc/init.d/mysqld status
mysqld dead but subsys locked
这样即使你是在安全模式下启动mysql都未必会有用的，所以一般是这样/etc/init.d/mysqld stop，如果你不幸先用了pkill，那么就start一下再stop咯。
# mysqld_safe --skip-grant-tables &
&，表示在后台运行，不再后台运行的话，就再打开一个终端咯。
# mysql
mysql> use mysql;
mysql> UPDATE user SET password=password("oracle") WHERE user='root';
mysql> flush privileges;
mysql> exit;
案例：
|
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[root@ogg ~]# mysqld_safe --skip-grant-tables &
[
1
]
3117
[root@ogg ~]#
140924
14
:
03
:
30
mysqld_safe Logging to
'/var/lib/mysql/ogg.err'
.
140924
14
:
03
:
30
mysqld_safe A mysqld process already exists
[
1
]+ Exit
1
mysqld_safe --skip-grant-tables
关闭mysql server：
[root@ogg ~]# service mysql stop
Shutting down MySQL.. [ OK ]
[root@ogg ~]# mysqld_safe --skip-grant-tables &
[
1
]
3243
[root@ogg ~]#
140924
14
:
03
:
48
mysqld_safe Logging to
'/var/lib/mysql/ogg.err'
.
140924
14
:
03
:
48
mysqld_safe Starting mysqld daemon
with
databases
from
/
var
/lib/mysql
[root@ogg ~]# mysql
Welcome to the MySQL monitor. Commands end
with
;
or
\g.
Your MySQL connection id is
1
Server version:
5.1.
47
-log Source distribution
Copyright (c)
2000
,
2010
, Oracle
and
/
or
its affiliates. All rights reserved.
This software comes
with
ABSOLUTELY NO WARRANTY. This is free software,
and
you are welcome to modify
and
redistribute it under the GPL v2 license
Type
'help;'
or
'\h'
for
help. Type
'\c'
to clear the current input statement.
mysql> use mysql
Database changed
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
4
rows
in
set (
0.01
sec)
mysql> show tables;
+---------------------------+
| Tables_in_mysql |
+---------------------------+
| columns_priv |
| db |
| event |
| func |
| general_log |
| help_category |
| help_keyword |
| help_relation |
| help_topic |
| host |
| innodb_index_stats |
| innodb_table_stats |
| ndb_binlog_index |
| plugin |
| proc |
| procs_priv |
| proxies_priv |
| servers |
| slave_master_info |
| slave_relay_log_info |
| slave_worker_info |
| slow_log |
| tables_priv |
| time_zone |
| time_zone_leap_second |
| time_zone_name |
| time_zone_transition |
| time_zone_transition_type |
| user |
+---------------------------+
29
rows
in
set (
0.00
sec)
mysql> update user set password=PASSWORD(
'oracle'
)
where
user=
'root'
;
Query OK,
3
rows affected (
0.00
sec)
Rows matched:
4
Changed:
3
Warnings:
0
mysql> flush privileges;
ERROR
1033
(HY000): Incorrect information
in
file:
'./mysql/tables_priv.frm'
mysql> exit
Bye
[root@ogg ~]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end
with
;
or
\g.
Your MySQL connection id is
2
Server version:
5.1.
47
-log Source distribution
Copyright (c)
2000
,
2010
, Oracle
and
/
or
its affiliates. All rights reserved.
This software comes
with
ABSOLUTELY NO WARRANTY. This is free software,
and
you are welcome to modify
and
redistribute it under the GPL v2 license
Type
'help;'
or
'\h'
for
help. Type
'\c'
to clear the current input statement.
mysql>
|
错误信息：
[root@ogg mysql]# mysqld_safe --skip-grant-tables &
[1] 3795
|
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10
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12
|
[root@ogg mysql]#
140924
14
:
15
:
09
mysqld_safe Logging to
'/var/lib/mysql/ogg.err'
.
140924
14
:
15
:
09
mysqld_safe Starting mysqld daemon
with
databases
from
/
var
/lib/mysql
[root@ogg mysql]# mysql
Welcome to the MySQL monitor. Commands end
with
;
or
\g.
Your MySQL connection id is
1
Server version:
5.1.
47
-log Source distribution
Copyright (c)
2000
,
2010
, Oracle
and
/
or
its affiliates. All rights reserved.
This software comes
with
ABSOLUTELY NO WARRANTY. This is free software,
and
you are welcome to modify
and
redistribute it under the GPL v2 license
Type
'help;'
or
'\h'
for
help. Type
'\c'
to clear the current input statement.
mysql> use mysql
Database changed
|
mysql> flush privileges;
ERROR 1033 (HY000): Incorrect information in file: './mysql/tables_priv.frm'
mysql> exit
Bye
|
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[root@ogg mysql]# service mysql stop
Shutting down MySQL....
.140924
14
:
15
:
44
mysqld_safe mysqld
from
pid file /
var
/lib/mysql/ogg.pid ended
[ OK ]
[
1
]+ Done mysqld_safe --skip-grant-tables
[root@ogg mysql]# service mysql start
Starting MySQL..
[ OK ]
正常连接：
[root@ogg mysql]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end
with
;
or
\g.
Your MySQL connection id is
1
Server version:
5.6.
4
-m7-log Source distribution
Copyright (c)
2000
,
2010
, Oracle
and
/
or
its affiliates. All rights reserved.
This software comes
with
ABSOLUTELY NO WARRANTY. This is free software,
and
you are welcome to modify
and
redistribute it under the GPL v2 license
Type
'help;'
or
'\h'
for
help. Type
'\c'
to clear the current input statement.
mysql> use mysql;
Database changed
mysql> flush privileges;
Query OK,
0
rows affected (
0.00
sec)
mysql>
|
本文转自 客居天涯 51CTO博客，原文链接：http://blog.51cto.com/tiany/1557738，如需转载请自行联系原作者
