一早起来，发现数据目录下的MySQL文件全部消失，一声冷汗，怎么回事！！？？？被黑了，还是因为前两天重启服务器导致mysql数据丢失？？？这是怎么回事，上网看看怎么解决，没找到解决方案！！！！看看mysql服务是不是开启的，

[root@pacteralinux mysql]# ps -ef|grep mysql

root      5379  4291  0 13:10 pts/0    00:00:00 grep mysql

[root@pacteralinux mysql]# service mysqld start

Starting MySQL..The server quit without updating PID file (/mnt/resource/mysqldate/pacteralinux.pid).[FAILED]

靠，服务关闭，而且启动不了！看日志：

131126 13:10:57 mysqld_safe Starting mysqld daemon with databases from /mnt/resource/mysqldate

2013-11-26 13:10:58 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).

2013-11-26 13:10:58 5650 [Note] Plugin 'FEDERATED' is disabled.

/usr/local/mysql/bin/mysqld: Table 'mysql.plugin' doesn't exist

2013-11-26 13:10:58 5650 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.

2013-11-26 13:10:58 5650 [Note] InnoDB: The InnoDB memory heap is disabled

2013-11-26 13:10:58 5650 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins

2013-11-26 13:10:58 5650 [Note] InnoDB: Compressed tables use zlib 1.2.3

2013-11-26 13:10:58 5650 [Note] InnoDB: Not using CPU crc32 instructions

2013-11-26 13:10:58 5650 [Note] InnoDB: Initializing buffer pool, size = 128.0M

2013-11-26 13:10:58 5650 [Note] InnoDB: Completed initialization of buffer pool

2013-11-26 13:10:58 5650 [Note] InnoDB: The first specified data file ./ibdata1 did not exist: a new database to be created!

2013-11-26 13:10:58 5650 [Note] InnoDB: Setting file ./ibdata1 size to 12 MB

2013-11-26 13:10:58 5650 [Note] InnoDB: Database physically writes the file full: wait...

2013-11-26 13:10:58 5650 [Note] InnoDB: Setting log file ./ib_logfile101 size to 48 MB

2013-11-26 13:10:58 5650 [Note] InnoDB: Setting log file ./ib_logfile1 size to 48 MB

2013-11-26 13:10:58 5650 [Note] InnoDB: Renaming log file ./ib_logfile101 to ./ib_logfile0

2013-11-26 13:10:58 5650 [Warning] InnoDB: New log files created, LSN=45781

2013-11-26 13:10:58 5650 [Note] InnoDB: Doublewrite buffer not found: creating new

2013-11-26 13:10:58 5650 [Note] InnoDB: Doublewrite buffer created

2013-11-26 13:10:58 5650 [Note] InnoDB: 128 rollback segment(s) are active.

2013-11-26 13:10:59 5650 [Warning] InnoDB: Creating foreign key constraint system tables.

2013-11-26 13:10:59 5650 [Note] InnoDB: Foreign key constraint system tables created

2013-11-26 13:10:59 5650 [Note] InnoDB: Creating tablespace and datafile system tables.

2013-11-26 13:10:59 5650 [Note] InnoDB: Tablespace and datafile system tables created.

2013-11-26 13:10:59 5650 [Note] InnoDB: Waiting for purge to start

2013-11-26 13:10:59 5650 [Note] InnoDB: 5.6.14 started; log sequence number 0

2013-11-26 13:10:59 5650 [Note] Server hostname (bind-address): '*'; port: 3306

2013-11-26 13:10:59 5650 [Note] IPv6 is available.

2013-11-26 13:10:59 5650 [Note]  - '::' resolves to '::';

2013-11-26 13:10:59 5650 [Note] Server socket created on IP: '::'.

2013-11-26 13:10:59 5650 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist

131126 13:10:59 mysqld_safe mysqld from pid file /mnt/resource/mysqldate/pacteralinux.pid ended

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

表初始化没做好;不管，下意识的删除日志看下能不能重启

1234567891011 [root@pacteralinux mysqldate]# ll

total 110640

-rw-rw----. 1 mysql mysql      56 Nov 25 17:17 auto.cnf

-rw-rw----. 1 mysql mysql 12582912 Nov 26 13:15 ibdata1

-rw-rw----. 1 mysql mysql 50331648 Nov 26 13:15 ib_logfile0

-rw-rw----. 1 mysql mysql 50331648 Nov 26 13:10 ib_logfile1

-rw-rw----. 1 mysql root    39056 Nov 26 13:15 pacteralinux.err

[root@pacteralinux mysqldate]# rm ib*

rm: remove regular file `ibdata1'? y

rm: remove regular file `ib_logfile0'? y

rm: remove regular file `ib_logfile1'? y

不行，网上看看能不能恢复数据，无解决方案！！

幸好这时一个mysql从服务器(我做了一个主从mysql热备份)！！！没办法，数据恢复不了就重新在复制一份吧！

上述步骤后还是不能启动数据

试试重新初始化：

[root@pacteralinux mysqldate]# /usr/local/mysql/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql/data/ --datadir=/mnt/resource/mysqldate/

FATAL ERROR: Could not find ./bin/my_print_defaults

If you compiled from source, you need to run 'make install' to

copy the software into the correct location ready for operation.

If you are using a binary release, you must either be at the top

level of the extracted archive, or pass the --basedir option

pointing to that location.

[root@pacteralinux mysqldate]# cd /usr/local/mysql/bin/

[root@pacteralinux mysql]# /usr/local/mysql/scripts/mysql_install_db --user=mysql --no-defaults

Installing MySQL system tables...2013-11-26 13:20:42 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).

2013-11-26 13:20:42 6036 [Note] InnoDB: The InnoDB memory heap is disabled

2013-11-26 13:20:42 6036 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins

2013-11-26 13:20:42 6036 [Note] InnoDB: Compressed tables use zlib 1.2.3

2013-11-26 13:20:42 6036 [Note] InnoDB: Not using CPU crc32 instructions

2013-11-26 13:20:42 6036 [Note] InnoDB: Initializing buffer pool, size = 128.0M

2013-11-26 13:20:42 6036 [Note] InnoDB: Completed initialization of buffer pool

2013-11-26 13:20:42 6036 [Note] InnoDB: Highest supported file format is Barracuda.

2013-11-26 13:20:42 6036 [Note] InnoDB: 128 rollback segment(s) are active.

2013-11-26 13:20:42 6036 [Note] InnoDB: Waiting for purge to start

2013-11-26 13:20:42 6036 [Note] InnoDB: 5.6.14 started; log sequence number 1600607

2013-11-26 13:20:42 6036 [Warning] InnoDB: Cannot open table mysql/innodb_table_stats from the internal data dictionary of InnoDB though the .frm file for the table exists. See http://dev.mysql.com/doc/refman/5.6/en/innodb-troubleshooting.html for how you can resolve the problem.

ERROR: 1146  Table 'mysql.innodb_table_stats' doesn't exist

2013-11-26 13:20:42 6036 [ERROR] Aborting

2013-11-26 13:20:42 6036 [Note] Binlog end

2013-11-26 13:20:42 6036 [Note] InnoDB: FTS optimize thread exiting.

2013-11-26 13:20:42 6036 [Note] InnoDB: Starting shutdown...

2013-11-26 13:20:44 6036 [Note] InnoDB: Shutdown completed; log sequence number 1600617

2013-11-26 13:20:44 6036 [Note] ./bin/mysqld: Shutdown complete

初始化不了，，删除之前初始化的文件试试

[root@pacteralinux data]# ll

total 12

drwx------. 2 mysql mysql 4096 Sep 25 12:27 mysql

drwx------. 2 mysql mysql 4096 Sep 25 12:27 performance_schema

drwxr-xr-x. 2 mysql mysql 4096 Sep 25 10:28 test

[root@pacteralinux data]# cd ..

[root@pacteralinux mysql]# rm -rf data/

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