[root@centos yum.repos.d]# /etc/init.d/mysqld stop
停止 mysqld： [确定]
[root@centos yum.repos.d]# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &
[1] 8307
[root@centos yum.repos.d]# 130531 01:08:38 mysqld_safe Logging to '/var/log/mysqld.log'.
130531 01:08:38 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
^C
[root@centos yum.repos.d]# ^C
[root@centos yum.repos.d]# mysql -u root mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.1.69 Source distribution
Copyright (c) 2000, 2013, 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> select host, user from user;
Empty set (0.00 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| test |
+--------------------+
3 rows in set (0.00 sec)
mysql> select host, user from user;
Empty set (0.00 sec)
mysql> use mysql;
Database changed
mysql> select host, user from user;
Empty set (0.00 sec)
mysql> UPDATE user SET Password=PASSWORD('123456') where USER='root';
Query OK, 0 rows affected (0.00 sec)
Rows matched: 0 Changed: 0 Warnings: 0
mysql> desc user;
ERROR 1 (HY000): Can't create/write to file '/tmp/#sql_20d3_0.MYI' (Errcode: 13)
mysql> desc USER;
ERROR 1 (HY000): Can't create/write to file '/tmp/#sql_20d3_0.MYI' (Errcode: 13)
mysql> insert into user(user,password) values('root',PASSWORD('123456'));
Query OK, 1 row affected, 3 warnings (0.00 sec)
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
mysql> quit
Bye
[root@centos yum.repos.d]# /etc/init.d/mysqld restart
130531 02:00:39 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
停止 mysqld： [确定]
正在启动 mysqld： [确定]
[1]+ Done mysqld_safe --user=mysql --skip-grant-tables --skip-networking
[root@centos yum.repos.d]# ps -ef | grep mysql
root 8452 1 0 02:00 pts/4 00:00:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --socket=/var/lib/mysql/mysql.sock --pid-file=/var/run/mysqld/mysqld.pid --basedir=/usr --user=mysql
mysql 8554 8452 0 02:00 pts/4 00:00:00 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --log-error=/var/log/mysqld.log --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/lib/mysql/mysql.sock
root 8563 7506 0 02:00 pts/4 00:00:00 grep mysql
[root@centos yum.repos.d]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.1.69 Source distribution
Copyright (c) 2000, 2013, 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> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
+--------------------+
1 row in set (0.00 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
+--------------------+
1 row in set (0.00 sec)