The tag has no usage guidance.

learn more… | top users | synonyms

14
votes
4answers
58k views

Determining cause of Linux kernel panic

I'm running an Ubuntu 12.04 derivative (amd64) and I've been having really strange issues recently. Out of the blue, seemingly, X will freeze completely for a while (1-3 minutes?) and then the system ...
12
votes
3answers
826 views

Can the filesystem become inconsistent if interrupted when moving a file?

I have two folders on the same partition (EXT2) If I mv folder1/file folder2 and some interruption occur (e.g. power failure) could the file system ever end up being inconsistent? Isn't the mv ...
12
votes
3answers
33k views

How to determine why my computer crashed?

Yesterday, I ran a bash script for about 10 hours. When I went to use the computer, it locked up. I have an Eee PC with Debian. The screen was still visible, but the mouse or keyboard had not ...
10
votes
3answers
2k views

How can I recover after Kate crashes?

I use Kate for coding and note-taking. Sometimes it crashes - often when I've got a lot open. Unsaved 'real' documents (eg, ones backed by files, that have been saved at some point) usually have a ...
8
votes
1answer
1k views

Trouble Logging Kernel Panic for Debugging

I'm running Ubuntu 12.04 on AWS/EC2 and having a large number of hosts going belly up. I'm trying to enable kernel dumping, but when I simulate a kernel panic, there's no .crash file written anywhere ...
7
votes
1answer
6k views

How to get last crash log from ArchLInux

My system suddenly crashed, I have restart it, where could I find the last/previous crash log, since there are no /var/log/syslog* anymore..
6
votes
2answers
5k views

What are the files located in `/var/crash/`?

I know when a program crashes, some files creating in /var/crash/. But I don't know what these files are! Is that error logs?
6
votes
2answers
334 views

bash crashed with for loop [duplicate]

The question may be trivial but with this simple for loop for i in {1..10000000}; do echo "$i" line >> file done my shell crashed after some elaboration time (the tab in the terminal emulator ...
6
votes
2answers
1k views

Why do some applications stop working when permissions are changed in /usr/bin?

On OS X, a friend of mine changed the permissions on /usr/bin recursively using Finder, in order to grand write access to everyone. Here is how it's done: Go to /usr/bin in Finder, then mess with ...
5
votes
1answer
2k views

System freezes. Can't find anything in the logs

My linux desktop system freezes (aptosid/debian sid) sometimes and after a reboot I can't find any infos about the reason for the freeze in messages/dmesg/syslog/Xorg.*.log. When it "freezes" I can ...
5
votes
1answer
1k views

Debugging a Segmentation Fault

I have an application that runs on an embedded Linux device that I am expanding with new features. The new features require GLib so, I am dynamically linking the required libraries to the application. ...
4
votes
1answer
297 views

How long should I wait between keystrokes when doing SysRq + REISUB?

I read this from here: The most useful combination is the Alt+SysRq/Prnt Scrn + R-E-I-S-U-B. The above basically means that while you press and hold Alt+SysRq/Prnt Scrn and press R, E, I, S, ...
3
votes
2answers
2k views

Is there a way to tell how many times my computer has rebooted in a 24 hour period?

I was doing a 24 hour code-a-thon and had to reboot numerous times and was wondering if there was a way to tell exactly how many the computer was rebooted or crashed.
3
votes
1answer
851 views

Chrome too many files open / crash / Sorry Jim

When using Google Chrome I frequently get “Sorry Jim” tabs. The browser also frequently freezes and crashes. Running it from terminal emulator show a long line of Too many open files: ...
3
votes
3answers
3k views

Black screen when installing Fedora 16

I have read many other threads here and elsewhere but found no solution... I'm trying to install Fedora 16 x86-64. At random points during installation I get black screens that do not go away. I ...
3
votes
1answer
3k views

Can the hard drive timeout be disabled in Linux (attempting task abort)

Unfortunately, when a hard drive (usually a virtual drive) is slow, Linux aborts requests to that drive after a timeout, possibly causing data corruption. Last time this happened to me, I had 2 vms ...
3
votes
1answer
3k views

Why does abrt take over log output for a process that didn't crash?

Short version: I have a long-running process (web proxy) that logs (verbosely) to syslog Something bad happens, and abrt steps in somehow The process continues to run... ...but all log messages to ...
3
votes
1answer
1k views

How to debug random reboots, with no kernel panic, of an embedded system?

I have two aValue RPC-10W1 embedded systems that reboots by themselves after 1-2 hours. Facts: The board will reboot within a time span of 1 to 2½ hours. The issue is present on two identical ...
3
votes
1answer
48 views

Pausing a process with -SIGSTOP for long enough causes Kernel Oops Stack Overflow

I am running the process mpg321 on a Raspberry Pi 2. mpg321 plays .mp3 files and to pause the music, I have a hotkey that enters sudo kill -SIGSTOP [pid of mpg321]. This works great, except for when I ...
3
votes
1answer
64 views

Investigate an unwanted shutdown over the weekend

This morning my machine running Fedora 22 was in a state of shutdown showing, IIRC, something like the following, in fullscreen white on black terminal: [Rebooting] ... System halted. After holding ...
3
votes
0answers
128 views

NUL entry in syslog?

My servers went down on the 30th. It just came back online today. At first I thought it was the router because the router the server is connected to is a bit squirrely but when I checked syslog I have ...
2
votes
4answers
3k views

Why does my linux keep crashing?

I am running Debian 6.0 Squeeze. Every half hour or so a dialog pops up on the side of my screen with the message - Kernel failure. A report has been sent to the developers to help them fix the ...
2
votes
1answer
936 views

Since Ubuntu persistent USB crashed, it fails to boot with black screen pre-login, what to do?

I'm using a persistent live USB version of Ubuntu 13.04. Recently it crashed while I was using it. When I restarted I couldn't get past the Ubuntu logo with the sequentially flashing dots anymore. ...
2
votes
2answers
3k views

After crash, e2fsck fails with weirdly high block numbers/sizes

After a breaker trip a Raspberry Pi of mine started to halt boot with kernel panic (same message as here). This is a Raspberry Pi running Raspbian, so it runs from a SD card, from a main ext4 ...
2
votes
1answer
148 views

How do I crash Ubuntu Linux 14.04 LTS deliberately?

I'm trying to crash an instance on AWS so that I can simulate what happens when it gets 'stuck'. I tried the top suggestions here How to cause kernel panic with a single command? but unfortunately ...
2
votes
2answers
50 views

Why doesn't this sequence of keys, using SyRq, work

I have Fedora 20, with zshell and Mate desktop. I have just come across this article about using SysRq keys, but they don't give the results shown there. I am using Alt with the key marked "Home" ...
2
votes
1answer
162 views

Where do drafts go when mutt crashes?

Sometimes a message doesn't get sent for whatever reason (e.g. a crash or shutdown). I can't find the message in the Drafts maildir (/new, /tmp, or /cur). Surely mutt must save the message somewhere ...
2
votes
3answers
257 views

Is Firefox for Linux generally unstable? [closed]

Started using Firefox in the early days and have used it as main browser for a long time. Under Windows, where I used it a lot until approximately 2011, I generally seldom had problems with it. ...
2
votes
1answer
925 views

Linux crashing my DD-WRT router

I'll start off that I'm new to Linux. A couple months ago I tried installing Ubuntu 11.10 on a laptop (HP). The install went great, however when setting up my wireless network, it caused my router ...
2
votes
2answers
5k views

Troubleshooting kernel panic — next steps after analyzing `crash` dump

I'm running an Ubuntu 12.04 machine with an Intel i7 CPU. Every now and then, it freezes up completely -- the machine and display stay on for a minute or so, the audio that was playing (if any ...
2
votes
0answers
42 views

Finding the Process which resulted in Kernel Panic

I have setup my linux system to generate Kernel Core Dump using KDump and kexec packages. I am using the crash tool to analyze the core dump. How do I find the call stack of the process which ...
2
votes
0answers
258 views

X server periodically restarting for no reason

The following is for an Debian 7.x (wheezy) amd64 machine - my personal workstation. X has been periodically restarting for no reason. It has been happening once a week or a bit less frequently. ...
2
votes
1answer
770 views

Linux Mint (LMDE) suddenly crashed and won't boot again

I was working on my linux machine earlier today and when I was in the middle of updating my java packages through the package manager and installing coffee script, my windows started not working and ...
2
votes
0answers
217 views

Debugging a “brutal” system hang (no longer responds to Alt+SysRq+B)

I've had a series of system hangs where I hoped to get a crash dump to at least get some clues but the normal "magic sysrq" functionality is broken too; not even the immediate reboot key works. The ...
2
votes
2answers
1k views

Finding error log related to specific crash in Ubuntu

Every time I try to start a specific program (Mathematica), my Ubuntu session crashes and I get thrown back to login screen. I want to find out 1) what is it exactly that crashes (probably X) and 2) ...
2
votes
0answers
320 views

Hardware problem after fresh Linux Mint install

I've installed Linux Mint, Mate 64bit on my machine. My configuration: Desktop PC HP Pro 3400 Series MT Processor: Intel Core i3 2120 @3.30GHz Chipset: Intel Sandy Bridge Graphic Interface: ...
1
vote
2answers
326 views

Fedora 20 Crashes on Older PC

I have an older PC that has been flawlessly running Windows XP for several years. Since Microsoft discontinued support for XP, I want to install the latest version of Fedora. While trying to install ...
1
vote
5answers
2k views

How to debug whether restarts are caused by software or hardware?

A newly build Linux debian 2.6.32-5-amd64 #1 SMP Sun Sep 23 10:07:46 UTC 2012 x86_64 GNU/Linux server suffers numerous restarts. 'last -x' output shows: root pts/0 192.168.254.11 Sat ...
1
vote
2answers
163 views

mysterious program crash: where to look for clues?

On Ubuntu 14.04, I often experience the following: open an application, and within 15 seconds or so the application window simply disappears from screen. If I ps aux | grep nameOfApplication it will ...
1
vote
2answers
995 views

How to see what processes WERE running?

Is there a chance to get the processes that RAN before my system crash? EDIT What I really want is to see the past processes. My system crashed & I want to know if a specific process was the ...
1
vote
2answers
923 views

Running `sudo /sbin/service mysqld start` causes system to crash

OS: CentOS 5.10 Service: Amazon Web Services Attempted to remove MySQL 5.0 and install MySQL 5.6 I had a server set up, and was going to use MySQL, but it was was set up with MySQL 5.0. Since ...
1
vote
1answer
277 views

Issues with X and xrandr on Debian

I am having an issue that I think is associated with X, xrandr and maybe WM I am using. I am on Debian 8 stable, updated; Intel graphics, i3wm, no DE lightDM (not sure if this is relevant, but at ...
1
vote
2answers
136 views

ext4 reported as clean by fsck after hard reset: Is that normal?

My root-partition is formatted as ext4-filesystem. I notice that, whenever my machine crashes and I have to hard-reset it, when booting up again and the root filesystem is checked this step takes a ...
1
vote
1answer
125 views

How to know I am using vi or emacs input?

Crash shell allows to specify the command line editing mode to vi or emacs. What will be the difference in these input methods? I am not asking about the internal features.
1
vote
1answer
48 views

After my system crashed and I run crash, but I get the following error: not a supported file format

My system crashed and even though I haven't been able to know what caused the crash after going through the usual logs: messages, dmesg, secure, etc. There's nothing valuable I have seen on them so I ...
1
vote
1answer
88 views

Missing core dump

I have a crashing application, which crashes with the output: Aborted (core dumped). Now when I look at the directory, containing the binary, there is no crashdump. There is no core directory. ...
1
vote
4answers
1k views

crash shell: any way to check if a command executed Successfully

I'm automating a test using crash package. Is there some thing like $?, which can be used to check if the previous command executed successfully or not inside a crash shell? For example, when ...
1
vote
1answer
231 views

Not using specific memory regions due to errors

I have just installed some new RAM (2x1GB, 667, sticks from 2x512MB, 533, sticks) into an old system (perfectly valid), and all was working fine, until now. I have been having some issues when the ...
1
vote
4answers
3k views

Why does VirtualBox crash when I finish the install of BackTrack?

I have a windows 7 64-bit machine in which I have installed VirtualBox and decided to install BackTrack. The installation finished fine, but when it asked me to "please remove installation media and ...
1
vote
1answer
59 views

How to debug an Out of memory crash

Recently one of my CentOS6 server crashed because of an Out of memory Error: It seems to be related to the postgres database used by java web-applications (deployed on tomcat). But I cannot find ...