Troubleshooting is a form of problem solving, often applied to repair failed products or processes.
2
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2answers
253 views
Why is USB not working in Linux when it works in UEFI/BIOS?
For background I have just built a new machine with modern hardware including:
AMD FX-8350
Gigabyte GA-990FXA-UD3 motherboard
16GB RAM
NVidia GTX 650 Ti
Kingston SSD
Given that, I tried to install ...
0
votes
1answer
64 views
How to troubleshoot high kernel time (high network usage; high interrupts)
I've noticed that I have high kernel time when doing a lot of network traffic in Linux. I also noticed that 45% of my CPU is spent doing interrupts. How can I further troubleshoot this?
1
vote
0answers
42 views
Null byte files in duplicity backup
When duplicty encounters 0-byte-files it gives an IO-error:
Error [Errno 5] Input/output error ... getting delta for ...
The files are usually some wired stuff like
...
1
vote
2answers
146 views
Backup to a synology NAS with bup
I am trying to make a remote backup to my Synology NAS (DSM 4.1) using bup.
I compiled bup on my NAS from source, did there:
BUP_DIR=/volume1/public/Backups/bup bup init
Initialized empty Git ...
1
vote
0answers
183 views
console-kit-daemon Hogging CPU and RAM
We have a system that's been a bit sluggish. top reports that console-kit-daemon takes anywhere from 18-30% CPU and about 50% memory. There are only two users logged in, one on X and one via ssh.
Any ...
1
vote
1answer
85 views
Encfs error: `/bin/umount: unrecognized option `--no-canonicalize'`
I just installed encfs from source on a synology disk-station (DSM 4.1) and it seems to work fine. But when I try to unmount my encfs directory via fusermount -u I get the error message:
fusermount ...
1
vote
1answer
81 views
Diagnose unplanned shutdowns
I have a problem with a server that is shutting down for some unknown reason. I check the logs each time it happens and cannot find anything of particular interest which would suggest why its going ...
3
votes
0answers
78 views
Slow ecryptfs mount
If I create an encrypted share (internally done via ecryptfs) on a synology disk station DS109 (DSM 4.1), mounting is very slow (approx 40 seconds).
It doesn't matter if I do it via the ...
1
vote
1answer
111 views
Killed `rm` and `cp` on nfs share
I am just testing an rsnapshot installation on my laptop which should backup to a NAS mounted via nfs on my laptop.
On one test rsnapshot died with a cp -al problem (i.e. a problem with hard links) ...
2
votes
1answer
44 views
How might I detect memory errors if I do not have root or physical access to a Linux system?
The background to my question is as follows. I currently rent a virtual private server from a major hosting company, which I use to run a minecraft server. I have a suspicion that there may be bad ...
2
votes
1answer
904 views
Gnome 3 “broken” after upgrades, kind of looks like gnome 2 . . .?
I'm running debian wheezy ( testing ) and after some upgrades my gnome 3 is broken. It's not exactly broken, but it's completey different. Almost like it's no longer actually gnome 3; most of the UI ...
1
vote
1answer
119 views
Accidentally set /lib permissions to 644
Long story short, I've got an Ubuntu server box that was recently compromised (I believe through a known exploit of an older version of Tomcat, which has already been updated). Part of the exploit ...
2
votes
1answer
146 views
Problem with java3d
I want to play this java simulation: http://www.compadre.org/OSP/items/detail.cfm?ID=9640 in java 3d mode on a linux (ubuntu) system. But it doesn't work.
If I switch to java 3d-mode it complains ...
5
votes
3answers
2k views
Linux network troubleshooting and debugging
From time to time Linux and Unix users faced with various network problems. Many of these problems are presented here and at some others troubleshooting forums, but the are very concrete and contains ...
2
votes
1answer
217 views
Debugging hanging bash process
After some bad performance today, I checked top:
1 PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
14229 myuser 20 0 8776 5264 1684 R 99 0.2 1383:47 bash
98-100% ...
3
votes
2answers
494 views
Remote-Accesible Live-Distribution(aka LiveCD)
I'm looking for a live-distribution (live CD or the likes) which comes - per default - with sshd running at startup.
I want to check the components of my laptop whose graphics has died ...
2
votes
0answers
287 views
can't open netbeans IDE in Fedora 17
my linux version is: Fedora 17
I installed Netbeans IDE 7.1.2 and it was working fine, but now, when I try to open it, nothing happens after double clicking on it.
I think updating the kernel may be ...
2
votes
1answer
642 views
how to troubleshoot a network adapter on an AIX 4.3.3 machine
I'm trying to brush up my skills on AIX. I have an ancient RS/6000 43P-133 which I'm trying to resurrect before investing in anything more sophisticated. I used to do automation and scripting on AIX ...
1
vote
2answers
90 views
non-distro specific, linux tweaking, hacking and learning support irc
distro specific support channels are good only if you run their clean stable versions out of the box and basically don't install anything other than what you get out of the box.... but what about ...
2
votes
1answer
683 views
Trouble booting CentOS
I switched from an Ubuntu to the CentOS yesterday. But it seems I have messed my installation somehow, since OS will only start correctly if the USB with the installation is plugged in.
Long story: ...
2
votes
1answer
64 views
Missing entries from messages file
I have a CentOS server that has been working well until recently. The virtualized instance of the server encountered some type of issue earlier today and required it to be hard rebooted in order for ...
7
votes
1answer
156 views
Where should I look for error messages after a freeze-up and reboot in Linux?
I was forced to shutdown (using the power button) and reboot after my laptop froze with just a black screen.
After such an incident, where should I look for error messages etc. that might indicate ...
3
votes
1answer
2k views
Why does my mouse stop working a short time into my session?
Running Easy Peasy 1.6 clean installation. Hardware - EEE PC 900-HA.
About 10 or so minutes into a new session after a reboot my mouse will stop working. It will still move the pointer, but it will ...
4
votes
2answers
456 views
How to troubleshoot the old X applications working incorrectly on modern X servers?
I have an old X application provided as a part of a complicated signal processing package. The application resides on the display-less server, and clients having different X-servers connect to it.
On ...
2
votes
2answers
44 views
How can I determine which service run during bootup is responsible for a certain behaviour?
On my Fedora 14 system, some strange bind mounts have appeared in the list of mounts. They appear on every bootup. I can unmount them with umount -l, but I would like to find which package is mounting ...
3
votes
0answers
265 views
Suggestions needed to debug why ps -ef gets stuck
A few of my processes consume 100% cpu. I'm trying to figure out which scripts are causing it
I tried running strace ps -ef:
open("/proc/PID/status", O_RDONLY) = 6
read(6, "Name:\textract\nState:\tR ...
3
votes
1answer
397 views
good unix troubleshooting book
I've been trying to learn *nix and I think I'm doing pretty good as far as basic commands, and I think I understand a lot of the "monitoring" type commands etc... in short, I think I'm doing okay with ...
2
votes
2answers
975 views
How do I reinstall software properly in Debian?
I got myself into trouble with mysql on debian lenny (details).
I tried these commands:
dpkg-reconfigure mysql
dpkg --purge mysql-server
apt-get install mysql-server
mysql_install_db
and variants ...
1
vote
2answers
248 views
How come I suddenly don't have any audio?
Just a few minutes ago my sound was working, and then it stopped! I suspect it was caused by me checking out some video editors. How do I go about troubleshooting this?
What I've so far tried:
I ...
5
votes
1answer
633 views
What would cause “crossover” between two USB2 webcams when using motion?
I am using the Motion package for linux to act as a security system with two Microsoft LifeCam HD-5000 webcams. In general it's working very well but I'm experiencing a weird issue. Every now and then ...
7
votes
3answers
335 views
Best practise to diagnose problems [closed]
As Linux/Unix users, we run into problems frequently. And after long hours of problem solving, we develop the skill of debugging.
Now, what are good principles, methods or best practises when trying ...
