一、完全解除安裝mysql
yum remove mysql mysql-server mysql-libs compat-mysql51
rm -rf /var/lib/mysql
rm /etc/my.cnf
#檢視是否還有mysql軟體：
rpm -qa|grep mysql
#如果存在的話，繼續刪除即可。
mysql-server(5.6)
mysql-client (5.6)
mysql-devel (5.6)
三、安裝
rpm -ivh mysql-server-5.6.17-1.linux_glibc2.5.x86_64.rpm
rpm -ivh mysql-client-5.6.17-1.linux_glibc2.5.x86_64.rpm
rpm -ivh mysql-devel-5.6.17-1.linux_glibc2.5.x86_64.rpm
四、問題
error 1045 (28000): access denied for user 'mysql'@'localhost' (using password: no)?
第一步：修改資料庫預設密碼/etc/init.d/mysql stop (service mysqld stop )/usr/bin/mysqld_safe --skip-grant-tables另外開個ssh連線[root@localhost ~]# mysqlmysql>use mysqlmysql>update user set password=password("123456") where user="root";mysql>flush privileges;mysql>exit第二步：[mysql@localhost etc]$ ps -a | grep mysql4532 pts/0 00:00:00 mysqld_safe5542 pts/0 00:00:00 mysqld[mysql@localhost etc]$ kill -9 4532 5542正常啟動 mysql：/etc/init.d/mysql start (service mysql start)第三步：
[root@linux-ke bob]# mysql -u root -p
enter password:
welcome to the mysql monitor. commands end with ; or \g.
your mysql connection id is 2
server version: 5.6.17
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第四步：
server version: 5.6.17
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;
error 1820 (hy000): you must set password before executing this statement
mysql> set password = password('123456');
query ok, 0 rows affected (0.00 sec)
mysql> show databases;
| database |
| information_schema |
| mysql |
| performance_schema |
| test |
4 rows in set (0.00 sec)
mysql>
完成
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