[root@localhost ~]# /etc/init.d/mysqld restart
停止 mysqld： [确定]
正在启动 mysqld： [确定]
故障：今天在维护以前数据库日志的时候，把目录下所有的日志都压缩拷贝到本地了以防以后查询使用，压缩之后清理了日志目录下/var/log/mysqllog所有的日志，然后重启服务
/etc/init.d/mysqld restart
[root@localhost ~]# /etc/init.d/mysqld start
MySQL Daemon failed to start.
正在启动 mysqld： [失败]
查看日志，
[root@localhost ~]# tailf /var/log/mysqld.log
:: [ERROR] Failed to open log (file '/var/log/mysqllog/myupdate.000050', errno )
:: [ERROR] Could not open log file
:: [ERROR] Can't init tc log
:: [ERROR] Aborting :: InnoDB: Starting shutdown...
:: InnoDB: Shutdown completed; log sequence number
:: [Note] /usr/libexec/mysqld: Shutdown complete :: mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
这个文件已经被我删除/var/log/mysqllog/myupdate.000050，是更新日志最后一个文件，所以mysql找不到这个文件，应该是还准备往这个文件里面写日志，所以我想是不是有什么命令应该可以让mysql更新日志重新滚动呢，在网上找了好久没找到，最后看见了在目录下面myupdate.index 这个文件。
[root@localhost mysqllog]# ls
log.sh mycommon-.log mycommon-.log mycommon-.log mycommon-.log mycommon-.log mycommon.log myupdate.index
[root@localhost mysqllog]# more myupdate.index
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
/var/log/mysqllog/myupdate.
原来这是记录了所有文件的索引信息，是不是清空了就会重新创建000001文件呢，试了一下。
[root@localhost mysqllog]# >myupdate.index
[root@localhost ~]# /etc/init.d/mysqld restart
停止 mysqld： [确定]
正在启动 mysqld： [确定]
果然可以正常启动了，再看目录下面也确实创建了000001，不知道有没有像我一样遇到这样问题的朋友，我觉得应该会有什么命令可以重载myupdate.index文件，本人数据库新手，虽然这个故障可能对于别人比较简单，记录下来供刚入门的朋友参考。