Linux重启后MySQL数据库文件全部丢失MySQL无法启动
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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