MYSQL服务常见错误总结

系统环境信息

• CentOS release 6.3 (Final)
• VMware® Workstation 9.0.0 build-812388

MYSQL 服务安装方式

    rpm安装包安装

常见错误1 ：启动MYSQL 出现ERROR 2002 (HY000):

   shell>mysql

   ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
   问题分析:  因为还没有启动mysql，当你启动mysql后，mysql.sock就会自动的生成

   解决方法1

  （采用如下启动方式）

   #/usr/bin/mysqld_safe &

   ctr+c

   #mysql -uroot

   Enter password:

   mysql>

   解决方法 2

   查找MYSQL进程

   shell>ps -ef|grep mysql

   杀死进程

   shell>kill -9 进程号

   启动MYSQL

   shell>/etc/init.d/mysqld start

    Starting mysqld  [OK]

常见错误2 ：

                 启动MYSQL

                 查看日志 /var/log/mysqld.log

                 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
                 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist

                 解决

                 #whereis mysql_install_db

                mysql_install_db:/usr/bin/mysql_install_db

                 #cd /usr/bin/mysql_install_db

                 #scripts/mysql_install_db --user=mysql --datadir=/var/lib/mysql

                ==================================================

                显示信息如下

Installing MySQL system tables...
OK
Filling help tables...
OK

To start mysqld at boot time you have to copy
support-files/mysql.server to the right place for your system

              ====================================================

              再次启动MYSQL

              #/etc/init.d/mysqld start

               stating mysqld                     [OK]