I have dedicated server running centos 6.0, and apache and the mysql
all of a sudden for some reason server has gone down, so i had to reboot the server and it all worked back to normal,
However i am wondering how do i get following information, I tried to use "uptime" command this only gives me the time that the server is running what i need to find out is
1. Actual time the server went down ?
2. How long the server has been down ?
...etc
any ideas?
You look through the in files /var/log.
Even if you don't find the errors that caused the outage outright, most of the files will have timestamps so you'll see a big gap in them - from the time the outage started, until you rebooted it.
Of course, this only works if the server actually stopped running - such as a kernel panic. If it was something like a misconfigured network card, it would still have been writing to the logs.
If it's a fairly busy webserver, you can also look through the access logs to see when it was last accessed before the reboot.
This is why you need a monitoring system.
Check your logs. There should be a gap in timestamps when your server was down. From that gap, you can get the approximate time when it went down as well as the duration.
