CentOS 6.5 下安裝配置 mysql

CentOS 6.5 下安裝配置 mysql

使用yum安裝，具體過程參見最下邊的參考文章。

安裝以後啓動失敗：

[root@localhost ~]# service mysqld start
Starting mysqld:                                           [  FAILD  ]

啓動失敗，查看出錯緣由（記錄在/var/log/mysqld.log 文件裏）：

[root@localhost ~]# cat /var/log/mysqld.log
190425 13:56:00 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
/usr/libexec/mysqld: Table 'mysql.plugin' doesn't exist
190425 13:56:00 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
190425 13:56:00  InnoDB: Initializing buffer pool, size = 8.0M
190425 13:56:00  InnoDB: Completed initialization of buffer pool
InnoDB: Error: log file ./ib_logfile0 is of different size 0 50331648 bytes
InnoDB: than specified in the .cnf file 0 5242880 bytes!
190425 13:56:00 [ERROR] Plugin 'InnoDB' init function returned error.
190425 13:56:00 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
190425 13:56:00 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist
190425 13:56:00 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended

190425 13:58:07 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
190425 13:58:07  InnoDB: Initializing buffer pool, size = 8.0M
190425 13:58:07  InnoDB: Completed initialization of buffer pool
InnoDB: Error: log file ./ib_logfile0 is of different size 0 50331648 bytes
InnoDB: than specified in the .cnf file 0 5242880 bytes!
190425 13:58:07 [ERROR] Plugin 'InnoDB' init function returned error.
190425 13:58:07 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
190425 13:58:07 [Note] Event Scheduler: Loaded 0 events
190425 13:58:07 [Note] /usr/libexec/mysqld: ready for connections.
Version: '5.1.73'  socket: '/var/lib/mysql/mysql.sock'  port: 3306  Source distribution

# 注意！（這裏的提示是解決以後的，剛安裝完mysql時啓動是報錯的，OK那裏是FAILD）
# 這裏的提示最後幾行是解決以後啓動了軟件而後端口開放了。與前邊報錯顯示在同一文件裏了。）

mysql報錯 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist

解決方法：

mysql_install_db （參考自文章2。）

# mysql默認不推薦用root用戶來啓動軟件。正常狀況下用root啓動會有提示或報錯，這裏沒有報錯就啓動了。須要注意一下。
[root@localhost ~]# service mysqld start
Starting mysqld:                                           [  OK  ]

mysqladmin 設置用戶名初始密碼報錯you need the SUPER privilege for this operation

CREATE USER 'root'@'localhost' IDENTIFIED BY '[這裏替換成想要設置的密碼]';
GRANT SELECT,INSERT,UPDATE,DELETE ON *.* TO 'root'@'localhost';
GRANT ALL ON *.* TO 'root'@'localhost';

配置root遠程訪問

# 說明：mysql對用戶訪問的控制比較完善，同一個用戶名從不一樣的機器訪問同一數據庫權限也是不一樣的。
# 以root爲例。同一個用戶root對應mysql數據庫中user表裏的多行數據。從本地訪問時user表裏對應host爲localhost的一行。
# 即便user表裏有一行的host叫作localhost.localdomain也不能從本地訪問。（經驗如此，具體緣由不詳）
# 從遠程訪問時須要配置user表裏對應host爲%的一行。

Enter password: *******
select user,host from user;
update user set host='%' where user='root';
flush privileges;

參考資料：

一、Linux學習之CentOS(十三)--CentOS6.4下Mysql數據庫的安裝與配置

二、mysql報錯Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist