Server Fault Stack Exchange
Server Fault Stack Exchange

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.

357 questions
5
votes
3 answers

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
  • 53,795
  • 33
  • 135
  • 209
5
votes
5 answers

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
  • 1,265
  • 2
  • 14
  • 19
5
votes
6 answers

Fortinet: Is there any equivalent of the ASA's packet-tracer command?

I would like to know if there is not Fortigates an equivalent of the packet-tracer command that we can find on the ASA. Here is an example of execution for those who don't know it: NAT and pass : lev5505# packet-tracer input inside tcp 192.168.3.20…
Kedare
  • 1,786
  • 4
  • 20
  • 37
5
votes
2 answers

Putty + Bash + Screen, up arrow for history not working (Ubuntu 11.10)

I have a fresh install of Ubuntu Server 11.10 that I am logging into SSH via PuTTy. When I am inside screen, I cannot use the up arrow to recall bash history (though this works outside of screen). I cannot seem to find the exact same problem on…
Mike S
  • 420
  • 4
  • 13
5
votes
2 answers

Delegate permissions to subfolder in TFS project

I need to give a TFS Project Group contributor privileges to a Source Control subdirectory in a TFS project. I can connect successfully as someone from this group but can't browse Source Control, presumably because the user doesn't have access to…
dmo
  • 2,100
  • 1
  • 16
  • 22
5
votes
5 answers

Open ports broken from internal network

Quick summary: Forwarded port works from the outside world, but from the internal network using the external IP the connection is refused. This is a simplified situation to make the explanation easier: I have a computer that is running a service on…
ksvi
  • 51
  • 1
  • 3
5
votes
5 answers

Fixing BIND9 rndc error "connection to remote host closed"

I just made some changes to a DNS zone in Webmin and clicked the "Apply Changes" button. I received the error message: rndc: connection to remote host closed This may indicate that the remote server is using an older version of the command…
Josh
  • 9,190
  • 28
  • 80
  • 128
5
votes
2 answers

List of Sysadmin Troubleshooting "Fire Drills"

One of the hardest things to do is to train sysadmins to solve problems (think) in a consistent way, especially when under pressure, the emergency bells are ringing, etc. For some training sessions, I'd like to come up with a collection of "Fire…
Brandon
  • 2,817
  • 1
  • 24
  • 28
5
votes
2 answers

Can tone ethernet cable into patch panel but it's not working

So we recently had to two major issues happen at a location. We had a lightning strike hit the building We updated switches after this lightning strike Now one thing that was 'hit' was a SOHO router. After upgrading the server room, we realized…
HeyHelpDeskGuy
  • 59
  • 4
4
votes
5 answers

Tracking down load average

The "load average" on a *nix machine is the "average length of the run queue", or in other words, the average number of processes that are doing something (or waiting to do something). While the concept is simple enough to understand,…
tylerl
  • 15,055
  • 7
  • 51
  • 72
4
votes
1 answer

windows update - strange behaviour using up all CPU

I have a windows 2008R2 server which has had windows update go mad. Last night it started pegging the CPU @ 100% and using 1GB RAM. Killing the Windows Update service took the CPU and MEM back to normal but i am struggling to find the root cause. …
Andrew
  • 49
  • 1
  • 3
4
votes
4 answers

How to diagnose a hang when creating a new folder in explorer.exe

I have been having some issues with explorer.exe hanging when I create a new folder. If I use Analyse Wait Chain in the Resource Monitor it says "One or more threads of explorer.exe are waiting to finish network I/O". When I look at the offending…
Schneider
  • 838
  • 4
  • 14
  • 22
4
votes
3 answers

Exim taking long time to send emails, how to decrease delay in Exim service?

The linux server where exim service is running is under no load. The system is sending email successfully but is taking a long time to send each email. Basically if I telnet to localhost port 25 and then I try to send an email from there the…
Geo
  • 3,071
  • 11
  • 42
  • 52
4
votes
4 answers

Troubleshooting wireless network in a 4000 square feet office

I work for a non-profit organization in a 4000 sf office with 30 staff. All laptops are connected to the network wirelessly. We have one switch (TP-Link TL-SF1008D Ethernet Switch) and three routers that function as AP (TP-Link TD-W891ND), with one…
khairul
  • 163
  • 7
4
votes
3 answers

How to change SMP affinity of an IRQ on Ubuntu PV domU inside Xen XCP?

I'd like to change IRQ SMP affinity for reasons, outlined in this question: CPU0 is swamped with eth1 interrupts But I can't — I see Input/output error when I try to write to /proc/irq/*/smp_affinity. Please point me to the HOWTO on the matter. (A…
Alexander Gladysh
  • 2,423
  • 8
  • 31
  • 49
1 2
3
…
23 24