MySQL启动时InnoDB引擎被禁用了的解决方法

Unknown table engine 'InnoDB'

mysql> show engines\G

*************************** 1. row ***************************
  Engine: MyISAM
  Support: DEFAULT
  Comment: MyISAM storage engine
Transactions: NO
   XA: NO
 Savepoints: NO
*************************** 2. row ***************************
  Engine: CSV
  Support: YES
  Comment: CSV storage engine
Transactions: NO
   XA: NO
 Savepoints: NO
*************************** 3. row ***************************
  Engine: MEMORY
  Support: YES
  Comment: Hash based, stored in memory, useful for temporary tables
Transactions: NO
   XA: NO
 Savepoints: NO
*************************** 4. row ***************************
  Engine: BLACKHOLE
  Support: YES
  Comment: /dev/null storage engine (anything you write to it disappears)
Transactions: NO
   XA: NO
 Savepoints: NO
*************************** 5. row ***************************
  Engine: MRG_MYISAM
  Support: YES
  Comment: Collection of identical MyISAM tables
Transactions: NO
   XA: NO
 Savepoints: NO
*************************** 6. row ***************************
  Engine: PERFORMANCE_SCHEMA
  Support: YES
  Comment: Performance Schema
Transactions: NO
   XA: NO
 Savepoints: NO
*************************** 7. row ***************************
  Engine: ARCHIVE
  Support: YES
  Comment: Archive storage engine
Transactions: NO
   XA: NO
 Savepoints: NO
*************************** 8. row ***************************
  Engine: FEDERATED
  Support: NO
  Comment: Federated MySQL storage engine
Transactions: NULL
   XA: NULL
 Savepoints: NULL
*************************** 9. row ***************************
  Engine: InnoDB
  Support: NO
  Comment: Supports transactions, row-level locking, and foreign keys
Transactions: NULL
   XA: NULL
 Savepoints: NULL
rows in set (0.00 sec)

[root@localhost mysql]# vim /etc/my.cnf