[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 140226 10:58:40 [ERROR] Failed to open log (file ‘/var/log/mysqllog/myupdate.000050‘, errno 2) 140226 10:58:40 [ERROR] Could not open log file 140226 10:58:40 [ERROR] Can‘t init tc log 140226 10:58:40 [ERROR] Aborting 140226 10:58:40 InnoDB: Starting shutdown... 140226 10:58:45 InnoDB: Shutdown completed; log sequence number 0 168021 140226 10:58:45 [Note] /usr/libexec/mysqld: Shutdown complete 140226 10:58:45 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-20140221.log mycommon-20140222.log mycommon-20140223.log mycommon-20140224.log mycommon-20140225.log mycommon.log myupdate.index
[root@localhost mysqllog]# more myupdate.index /var/log/mysqllog/myupdate.000001 /var/log/mysqllog/myupdate.000002 /var/log/mysqllog/myupdate.000003 /var/log/mysqllog/myupdate.000004 /var/log/mysqllog/myupdate.000005 /var/log/mysqllog/myupdate.000006 /var/log/mysqllog/myupdate.000007 /var/log/mysqllog/myupdate.000008 /var/log/mysqllog/myupdate.000009 /var/log/mysqllog/myupdate.000010 /var/log/mysqllog/myupdate.000011 /var/log/mysqllog/myupdate.000012 /var/log/mysqllog/myupdate.000013 /var/log/mysqllog/myupdate.000014 /var/log/mysqllog/myupdate.000015 /var/log/mysqllog/myupdate.000016 /var/log/mysqllog/myupdate.000017 /var/log/mysqllog/myupdate.000018 /var/log/mysqllog/myupdate.000019 /var/log/mysqllog/myupdate.000020 /var/log/mysqllog/myupdate.000021 /var/log/mysqllog/myupdate.000022 /var/log/mysqllog/myupdate.000023 /var/log/mysqllog/myupdate.000024 /var/log/mysqllog/myupdate.000025 /var/log/mysqllog/myupdate.000026 /var/log/mysqllog/myupdate.000027 /var/log/mysqllog/myupdate.000028 /var/log/mysqllog/myupdate.000029 /var/log/mysqllog/myupdate.000030 /var/log/mysqllog/myupdate.000031 /var/log/mysqllog/myupdate.000032 /var/log/mysqllog/myupdate.000033 /var/log/mysqllog/myupdate.000034 /var/log/mysqllog/myupdate.000035 /var/log/mysqllog/myupdate.000036 /var/log/mysqllog/myupdate.000037 /var/log/mysqllog/myupdate.000038 /var/log/mysqllog/myupdate.000039 /var/log/mysqllog/myupdate.000040 /var/log/mysqllog/myupdate.000041 /var/log/mysqllog/myupdate.000042 /var/log/mysqllog/myupdate.000043 /var/log/mysqllog/myupdate.000044 /var/log/mysqllog/myupdate.000045 /var/log/mysqllog/myupdate.000046 /var/log/mysqllog/myupdate.000047 /var/log/mysqllog/myupdate.000048 /var/log/mysqllog/myupdate.000049 /var/log/mysqllog/myupdate.000050
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。