I'm using red hat 6.0 on Sun Cobalt hardware raq4i.
Yesterday the system hang because of an clear reason
The only response was ping (no telnet http ftp ssh etc).
The only way out was turning in off and on !
There was no special activity in the time the hang occur !
(just daily cron job)
After it boot I tried to look in some of the log file to find any clue
why it happen.
auth dmesg maillog secure xferlog
httpd/access httpd/error cron kernel messages
In all those log file I couldn't find any clue.
You can see some normal events until the time of the hang (20:40)
and then the boot and after boot events (14:00)
Yes it took my hosting company 18 hours !
to reboot it :-(
How can I know why it happen and prevent it ?