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。

安裝之後啟動失敗：

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

啟動失敗，查看出錯原因（記錄在/var/log/mysqld.log 檔案裡）：

[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

（這裡的提示最後幾行是解決之後啟動了軟體然後埠開放了。與前邊報錯顯示在同一檔案裡了。）

 

解決方法：

mysql_install_db （參考自文章2。）

# 注意！（這裡的提示是解決之後的，剛安裝完mysql時啟動是報錯的，OK那裡是FAILD）
# 另，mysql預設不推薦用root使用者來啟動軟體。正常情況下用root啟動會有提示或報錯，這裡沒有報錯就啟動了。需要注意一下。
[root@localhost ~]# service mysqld start
Starting mysqld:                                           [  OK  ]

參考資料：

1、Linux學習之CentOS(十三)--CentOS6.4下Mysql資料庫的安裝與配置

2、mysql報錯Fatal error: Can't open and lock privilege tables: Table 'mysql.ho