How to find out the cause of Unix machine reboot?

Discussion in 'Linux Discussion' started by f2000, May 9, 2008.

  1. f2000 Guest

    One of my SUN-Sparc server (with Solaris 8 installed on it) rebooted today. There is no indication in /var/adm/messages about the reason of this reboot ... I can just see the boot-up messages in it? Any idea on how the root cause could be determined?
  2. atif Guest

    several possible reasons:

    - run history, last commands to check who were connected at the time of reboot and which commands were executed
    - no hints in /var/adm/messages indicate, it was either power break-down or the file was overwritten later to remove some messages?
    - run /usr/platform/sun4u/sbin/prtdiag -v to check any system failures
    - check cron entries, configuration files, binanies for any possible hijack attempt. also monitor network traffic through snoop, netstat etc
    - check syslogs in /var/log; also try to increase logging levels (/etc/syslog.conf). it might be helpful in future in troubleshooting problems
  3. mammi Guest

    Pls have a look at the following sites:

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