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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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Best way to troubleshoot apache not starting?

We have recently gotten a backup server to mirror all our data onto in case the primary server goes down. I've gotten all the sites data updated through rsync, and all the apache config and databases updated. Both machines are on Ubuntu 9 (9.04 on…
Lowgain
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Troubleshooting strategy for very poor iSCSI/NFS performance

We have a new Synology RS3412RPxs that offers iSCSI targets to three Windows 2008 R2 boxes and NFS to one OpenBSD 5.0 box. Logging into the RS3412 with ssh and reading/writing both small files and 6GB files using dd and various blocksizes show great…
Alex Holst
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Performing root-cause analysis

I want to learn more about how to perform root-cause analysis. More times than not, our department tells the user to try rebooting (thier Windows XP system), which actually "fixes" a good number of problems. When I am in a hurry (and sometimes…
jftuga
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Slow network speeds - what should I check?

Users are reporting that it's taking a long time to access files on the network, browse intranet sites, etc. What should I check?
Jon Galloway
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DNS issues after KB3200970 and KB3202790 updates installed

I have notices the issues after I let run Windows it updates a week ago. O The issue is illustrated here. What's happening is that when I open a link (or a new tab, etc), it's very likely the first request will give me the Chrome error page for no…
Mr. Raspberry
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How to troubleshoot Windows? Post your checklist

There is sometimes a situation when Windows suddenly goes crazy: is slow, unresponsive, some things don't work, it crashes. I wonder how do you approach diagnosing those issues. I'm merely a programmer, not really knowing Windows too deply. There is…
ya23
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SSH closes connection when key is accepted

In server's auth.log: Failed publickey for agladysh from MYIP port 61313 ssh2 In ssh -vvv: debug1: Offering public key: /Users/agladysh/.ssh/id_rsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug1: Server accepts…
Alexander Gladysh
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Troubleshooting linux server reboots?

I have a Linux server I've just set up, debian squeeze, 2.6.32-5-amd64, and over the past week it's rebooted three times, twice in one day. There was no power outage that I am aware of (and it's running on a UPS), and there are no errors in syslog,…
davr
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What would be causing "PowerShell.exe" to hang upon opening on multiple systems and/or how can I troubleshoot it?

What would be causing "PowerShell.exe" to hang upon opening on multiple systems? I've waited for over 60 minutes, but it never fully starts. All it does is show the blue shell window with the typical PowerShell startup output of: Windows…
Clark
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creating decision tree based troubleshooting documentation?

We troubleshoot a lot of server and network issues and follow a loose set of steps on what to do in different cases. With more and more people and responsibility, the need for standardization is needed so we don't miss something. I know I could…
Joseph
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debugging stuck apache/php thread on production server

I have a linux system with apache httpd and PHP which is loaded using LoadModule php5_module /usr/lib/apache2/modules/libphp5.so. I've enabled the mod_status module of apache and I see a particular thread which is stuck doing something since…
cherouvim
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Machine with bonded interface does not receive multicast packets on all slave interfaces

After an upgrade of our machines from RHEL 6.6 to RHEL 6.7 we observed a problem where 4 of our 30 machines only receive multicast traffic on one of their two slave interfaces. It is unclear if the upgrade is related or if the included restart…
K Erlandsson
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How to do periodic Sql Server performance monitoring and troubleshooting?

What are the best tools and processes for periodically monitoring and troubleshooting sql server performance issues?
James Moore
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Troubleshooting Windows EAP/RADIUS connectivity issues

So, I guess the short version of the question is: I'm unable to get clients to connect to an enterprise-WPA wireless network after setting up a "new" NPS server and a new CA. After I manually request a new cert on my client from the NPS/CA server…
HopelessN00b
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How to translate error number to 'errno' constant?

Suppose I have an application running on a UNIX box that is failing with a system error status of '13'. Now, I can easily look up this value in errno.h, to find out that it is a permission-denied problem. > grep -w 13 /usr/include/errno.h #define…
An̲̳̳drew
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