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Old 02-26-2008, 05:07 PM   #1
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link to the server is down after sometime

I installed CentoOS in one machine with AMD opetron processor. I am using static DHCP to assign its IP address I can ssh to this machine from other machines. But after several hours, I cannot ssh to that machine anymore. But after I login that machine, run firefox and access internet once, then I can access that machine from other machines.
How can I debug this issue? Is it because after several hours, this machine is hibernating or my router issue?
Old 02-27-2008, 04:19 AM   #2
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Sounds like power management. Is apmd running? Read up more about apmd. Another thing to check is your BIOS settings for power management. If you verified that everything looks correct for those two, then it's time to look at the system logs in /var/log and see what's going on.

Old 02-27-2008, 11:28 PM   #3
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Hi twantrd,
Thanks for the info. I am new to linux and I could not apmd command in my machine and I also don't have /etc/sysconfig/apmd file. Can you give me more detailed info?
Old 02-27-2008, 11:59 PM   #4
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chkconfig --list | grep apmd
Old 02-28-2008, 11:30 PM   #5
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No. I don't have apmd running. The interesting thing is that from that machine (, I can ping But from 101 machine, I cannot ping when that happens.
-- Alfred


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