服务器重启。请高手请教

Question

Oct 20 06:25:08 game2008 syslogd 1.4.1#20ubuntu4: restart.
Oct 20 06:37:42 game2008 -- MARK --
Oct 20 06:57:43 game2008 -- MARK --
Oct 20 07:17:01 game2008 /USR/SBIN/CRON[4895]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Oct 20 07:37:44 game2008 -- MARK --
Oct 20 07:53:01 game2008 /USR/SBIN/CRON[4898]: (root) CMD (/home/nbgame2008/bin/lcmjrobot2-stop.sh)
Oct 20 07:55:01 game2008 /USR/SBIN/CRON[4978]: (root) CMD (/home/nbgame2008/bin/lcmjrobot-start.sh)
Oct 20 08:17:01 game2008 /USR/SBIN/CRON[5053]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Oct 20 08:37:46 game2008 -- MARK --
Oct 20 08:57:47 game2008 -- MARK --
Oct 20 09:17:01 game2008 /USR/SBIN/CRON[5058]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Oct 20 09:37:48 game2008 -- MARK --
Oct 20 09:57:48 game2008 -- MARK --
Oct 20 10:17:02 game2008 /USR/SBIN/CRON[5061]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Oct 20 10:37:50 game2008 -- MARK --
Oct 20 10:57:50 game2008 -- MARK --
Oct 20 11:17:01 game2008 /USR/SBIN/CRON[5064]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Oct 20 11:37:51 game2008 -- MARK --
Oct 20 11:57:52 game2008 -- MARK --
Oct 20 12:17:01 game2008 /USR/SBIN/CRON[13030]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Oct 20 12:37:53 game2008 -- MARK --
Oct 20 12:57:54 game2008 -- MARK --
Oct 20 13:17:01 game2008 /USR/SBIN/CRON[13033]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Oct 20 13:18:06 game2008 init: tty4 main process (4765) killed by TERM signal
Oct 20 13:18:06 game2008 init: tty5 main process (4766) killed by TERM signal
Oct 20 13:18:06 game2008 init: tty3 main process (4770) killed by TERM signal
Oct 20 13:18:06 game2008 init: tty1 main process (4772) killed by TERM signal
Oct 20 13:18:06 game2008 init: tty6 main process (4773) killed by TERM signal
Oct 20 13:18:06 game2008 init: tty2 main process (476 killed by TERM signal
Oct 20 13:19:07 game2008 mysqld[4920]: 101020 13:19:07 [Note] /usr/sbin/mysqld: Normal shutdown
Oct 20 13:19:07 game2008 mysqld[4920]:
Oct 20 13:19:07 game2008 mysqld[4920]: 101020 13:19:07  InnoDB: Starting shutdown...
Oct 20 13:19:09 game2008 mysqld[4920]: 101020 13:19:09  InnoDB: Shutdown completed; log sequence number 0 1886590435
Oct 20 13:19:09 game2008 mysqld[4920]: 101020 13:19:09 [Note] /usr/sbin/mysqld: Shutdown complete
Oct 20 13:19:09 game2008 mysqld[4920]:
Oct 20 13:19:09 game2008 mysqld_safe[13113]: ended
Oct 20 13:19:43 game2008 exiting on signal 15
Oct 20 13:51:10 game2008 syslogd 1.4.1#20ubuntu4: restart.
Oct 20 13:51:10 game2008 kernel: Inspecting /boot/System.map-2.6.20-15-server
Oct 20 13:51:10 game2008 kernel: Loaded 25134 symbols from /boot/System.map-2.6.20-15-server.
Oct 20 13:51:10 game2008 kernel: Symbols match kernel version 2.6.20.
Oct 20 13:51:10 game2008 kernel: No module symbols loaded - kernel modules not enabled.
Oct 20 13:51:10 game2008 kernel: [    0.000000] Linux version 2.6.20-15-server (root@palmer) (gcc version 4.1.2 (Ubuntu 4.1.2-0ubunt
u4)) #2 SMP Sun Apr 15 07:41:34 UTC 2007 (Ubuntu 2.6.20-15.27-server)

请高人指点下，这是服务器正常重启还是服务器有问题自己重启了。
系统：ubuntu7.04

Answer 1

只能监控了,收集重启时间是否有规律,服务器负载,cpu温度等硬件温度,comm-history,重启时候登录情况
大致我想到的只有这些

Answer 2

看日志好像是看不出什么的，我只看到了一条数据库MYSQL是正常关闭。
还得请高人出来分析......

Answer 3

怎么看都是正常关机