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Questions tagged [troubleshooting]

Troubleshooting is a form of problem solving, often applied to repair failed products or processes.

It is a logical, systematic search for the source of a problem so that it can be solved, and so the product or process can be made operational again. Troubleshooting is needed to develop and maintain complex systems where the symptoms of a problem can have many possible causes.

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What could cause two devices to refuse to link?

This is a curious case where all the devices at hand will link with one another, except for two that just won't detect one another. One device is a single board computer (SBC) with a gigabit nic, the other is a fancy managed gigabit switch. If I…
JustJeff
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How to troubleshoot hanging linux server

I have several Ubuntu Server 8.04 machines at a remote location. Every couple of months or so, one of them would stop responding and need to be power cycled. From looking at my log files it seems that all my processes are running fine until at some…
itsadok
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How to troubleshoot events in the Windows Event Logs?

How do you troubleshoot events that are not clear when you read them? Is there a website to search for those Event IDs and errors? In the following example event it is clear that the gateway resolution fails for the network location awareness…
Tamara Wijsman
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How to analyze which virtual host account is most greedy?

Hi there and sorry if this is too noobish. I've tried to find the answer myself as I usually do but I failed. What is the best practice when I need to analyze which virtual hosts are consuming the most of the system resources - especially…
Michal Mau
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Citrix degrades with 100% CPU

We have a Citrix PS4.0 farm made up of 2 physical and 2 virtual Citrix servers. Any one of them at some point or another will eventually degrade in performance due to hitting 100% CPU usage. I can see the CPU usage spike in the Virtual…
Kevin Kuphal
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Word 2003 Normal.dot template always becoming corrupt

I have a user who always seems to have an issue with his normal.dot file becoming corrupt. In the past I've deleted or renamed the normal.dot file, and reopened to create a new one. This seem to fix the problem. Yet, for some strange reason the file…
steveng1999
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Alternate Out of Order TCP Packets problem

I have a Windows network with embedded nodes connected to a series of Cisco switches. I have been seeing some serious network problems starting a few days ago. I used Wireshark to capture the network trace and see every alternate TCP packets being…
Sunil
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How can I install Windows 7 without burning a DVD or using a USB Drive?

I downloaded the .iso of Windows 7 and would now like to install it as my main OS. However I can't because I don't have a DVD Burner, a 2+ GB USB Drive, or a external HDD (or extra HDD). So how can I install Windows 7?
Kredns
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How can I troubleshoot a broken on/off switch?

I have a file server that was recently relocated in a transoceanic move. It isn't under warranty, as it was a custom-built in-house tower. When I hooked everything up and tried to boot it, the system does not respond at all -- power supply and…
romandas
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Email delivery is slow between us and counterparty. What can I do to determine root cause?

Emails between us and a specific counterparty are delayed. To give you some idea, we send 10 messages and over 40% arrive with a 20 (or greater) minute delay. We even had two messages arrive in 50 minutes! I'm measuring the delay based on the header…
booyaa
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Computer only starts on Last known good configuration

My computer restarts everytime the login dialog is about to appear. It only loads fine on 'Last known good configuration' option What steps should I follow to debug this issue? OS: Windows Server 2003
Muhammad Hasan Khan
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Webdav troubleshooting on Mac OS X

Are there any tools/instructions/pointers about how to troubleshoot webdav problems on Mac OS X? Any secret mount options, undocumented webdav module logging, anything? What I usually do is to reroute webdav traffic via Fiddler/Charles…
Peter Štibraný
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How to troubleshoot internal DNS resolution (Windows DNS server) pointing to a local server with a static internal IP address

To better explain the set up I have a Debian server in a private network with a static IP. There is a windows AD server that resolves DNS for clients internally. A domain name is already registered and a public IP is pointed to the server AAA…
Bantu
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How to determine process which makes DNS Request?

I have a server on AWS, GuardDuty started send me notifications: *** "type":"Backdoor:EC2/C&CActivity.B!DNS", *** {"domain":"libcurl.so","protocol":"UDP","blocked":false} *** is querying a domain name associated with a known Command & Control…
kbu
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Diagnose Network Faults

Disclaimer: I am a developer, not a system admin, please be gentle. Where I work we are having a lot of intermittent network problems. Sometimes the DNS will fail, but access to servers can be done via IP, sometimes access via IP fails. So far as we…
Rob White
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