General :: System Rebooting On Its Own / Where To Check For Reasons?
Nov 4, 2010
I have NFS fileserver that has served me well for more than year. But recently I noticed that it has started to reboot on its own very frequently, almost once a day! It is most likely not a power related issue as I tried changing UPS/power sources, but no help!So my question is:Is there any log file where I can check which is causing the reboot? There may not be a single logfile, but I need some point to start the investigation!
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May 8, 2010
I'm trying to come up with a startup init script that will check to see if the system was shut down gracefully, or if it is rebooting from a poweroff or something similar?Anyone know of a way to check for this condition with the least amount of room for false positives or vice versa?My intial thought is just a startup script that will will check for a file on startup, and on a proper reboot/shutdown just touch the file. But id like to avoid that type of script if possible,
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Apr 17, 2011
How to update newly created partion in RHEL6 without rebooting the system?partprobe /dev/sdaN...does not work here in RHEL6, however it did work in RHEL 5.
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Oct 15, 2009
I have 3 cronjobs set up on my Unix server . Out of which 2 cron jobs run the same script but at different times and the other one runs another script.
So in the 2 jobs which are set to run PMDaily.sh for eg , One runs on Sunday at 8AM and the other runs monday to friday at 6 AM . How ever the Sunday cronjob works (runs through the crontab) but the Cron job set for Monday to Friday is not working. However manually if i run this script it workd perfectly.
Please let me know what could be the possible reasons for this?
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Jan 6, 2010
My suspend-to-disk and suspend-to-RAM stopped working months ago. I've grasped at straws about why ever since, but I really don't think it's a software problem, because I've reinstalled my system (MEPIS) repeatedly. What sort of hardware failures could cause this? What should I be looking for? I notice that at boot, Linux always says "no resume image found," even if I left the system in suspension or hibernation. I can post parts of the dmesg if someone tells me what to look for; I can't display the whole thing because it's too long to fit here.
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Feb 26, 2010
Can I add memory to the Linux box without rebooting the system? I think Linux check the hardware at booting time. But if I need to add more memory to the server while I do not want to stop the service. Is there some method to make Linux use the new added memories?
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Aug 17, 2011
I am running Debian Squeeze on an Intel DH55TC motherboard. When I issue a shutdown command
shutdown -h now
The system goes shutting down. Eveything looks fine, and the main console shows all process being stopped. In the end it says "System will now halt". Then a few seconds later, it restarts. It is unclear what is causing this, because nothing is written to the screen. It just goes blank and starts rebooting. Looking afterwards in syslog doesn't show anything also.
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Feb 6, 2011
Why rebooting is not required in linux after installing an application even if related important files are running?
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Mar 26, 2010
I have Debian (Kernel 2.6.26-2-686) installed on two computers. On one of them it reboots quite finely but I am having following problem with rebooting Debian on my second computer.When i type reboot at the linux prompt, following messages appear and system hangs up after saying "Restarting System":
The difference that I noted between my two computers is that I don't have ACPI support in the BIOS of the system which is giving me this error whereas the BIOS of my first computer do have ACPI support on which Debain do not give this Restart hanging problem.I have also disabled running the acpid script by running Code: update-rc.d -f acpid remove.
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Jul 2, 2010
As i read in google that if we Ctrl+Alt+Del in linux box system get rebooted i tried in my PC its not rebooting.
even though i un commented the line in /etc/inittab
ca::ctrlaltdel:/sbin/shutdown -t3 -r now
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Mar 29, 2011
Would like to know what command can be used to check for other user accounts on my system. Note, not presently logged in users like whocommand just a command to know other users?
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Oct 27, 2010
I have a program that i want to install on only RHEL 3 and 4. It does not support RHEL 5. How do i check if a Reh Hat OS is 3 or 4 and not 5.Similarly i need to check this for SUSE 9 and 10. For RHEL, i am trying to see uname -a and also cat /proc/redhat-release. How do i make sure that if the target system is RedHat 3 or 4. and in case of SUSE, how i decide for SUSE 9 or 10 and not other.
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Mar 18, 2011
Can anyone tell me how to check IHS version in Linux
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Nov 14, 2010
since upgrade to suse 11.3 every time I reboot pc the file /etc/hosts is reset to default value. I am a web developer so I need to put in there my aliases for 127.0.0.1. It is annoying to do it again and again. Luckily, I don't restart my system very often but still I would like to avoid that.What should I do to stop this resetting? Or is there another place in 11.3 where should I put my entries?
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Feb 11, 2010
I have noticed that ubuntu 9.10 (but also other distro and in general those that configure the network automatically at startup) crashed if my pc boot directly with a linux kernel at power on.This does not happen if the first boot is done with windows xp and then rebooting the pc and choosing the same linux kernel.Some distro (for example SysrescueCD) that does not configure the network at startup can work but also with these if I try to configure the network using the command ifconfig eth0 the system crashes.My network card is a SiS191 Ethernet and linux recognized it using sis190 module.I suppose that something happen during the first power on, some inizialization done with windows xp but does not done with linux in fact after a reboot made from windows xp without shutdown the pc, with Linux I can configure the network using ifconfig without crash.
Any ideas to solve this without have to boot always windows as first?
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Aug 27, 2010
I have a machine that experienced some troubles with some of the real time stuff that I'm running. One lead that I have is that NTP daemon may have moved the time, causing false timeouts.
How do I find out if NTP daemon did indeed move time at all? Any logs? I do see NTP daemon restart in /var/log/messages, but I don't know if time adjustment should be there as well. to clarify: I need to understand it from the logs, after the event. May be 2 days after the time was adjusted. Running commands to see the current status doesn't help.
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Mar 2, 2011
I know one way is to enforce rules on the passwords, use at least one uppercase, lowercase, number, special character, and ensure that the password length is at least 8 characters, etc...
Is there an additional way to prevent weak passwords? I heard of "John the ripper". Has anyone successful applied that?
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Jun 1, 2010
I have installled ubuntu 9.04 and windows XP. After rebooting the system the desktop background image which i saved earlier is not showing up in Ubuntu.
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Dec 7, 2010
I have a question regarding the /proc/interrupts file. Let's say for example I had a server with 2xQuad-Core processors (so we have CPU0 to CPU7 ), and with 5 network interfaces. SMP affinity to all 5 interfaces was set to "ff", so all interfaces have done interrupts on all the processors. he network interfaces interrupts counters should look like this:
24: 32650776 32670506 50315017 32677739 32672119 32677935 32656299 32667496 IO-APIC-fasteoi eth2
27: 35233448 35285546 35317201 52657622 35315835 35339998 35221092 35246597 IO-APIC-fasteoi eth3
55: 37573056 35870363 35874607 35858010 37728061 35880275 35882340 35882127 PCI-MSI-edge eth1
56: 35861392 35863516 35865123 35865342 35864604 40515822 35861250 35863585 PCI-MSI-edge eth0
58: 30173318 30109146 30002990 30016870 30084937 30034759 46517278 30139103 PCI-MSI-edge eth4
Now let's say I've set the affinity to each of the network interfaces, so that it balances one per processor, so we have 5 processors working only for the network interfaces each processor with it's own eth. Now let's assume that the network interfaces generate very few interrupts, and that they show up every 5-6 seconds, so watching cat /proc/interrupts doesn't exactly underline the modifications unless you look with a ruler. Is there a way to reset the counters on /proc/interrupts so that they all start at 0, without rebooting the system?
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May 18, 2010
i have problem during boot my F11 , the problem is :
Code:
checking file systems
/dev/sda7 : superblock last time ( etc... )
/dev/sda7: Unexpected inconsistency ;run fsck manually (i.e,without -a or -p option)
***an error occured during the file system check
***dropping you to shell:
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Aug 12, 2010
I have doubts regarding storage:
How to configure the Events of Storage Processor?
What are performance issues will come daily in a critical production server?
What are first steps for disk performance Check?
What are first steps for Storage Processor performance Check?
What are first steps for MetaLUN performance Check?
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Mar 3, 2010
I'm using Gnome and I'd like to still have the ability to reboot/shutdown from one particular account as well as root. How would I modify the chmod command to add this ability?Also, I have a few users who just will hold the power button in to shutdown the machine. How can I keep them from doing this?// Pruned from the vintage 2007 Prevent a non-root user from shutting down, rebooting or suspend the system thread. Please create new threads instead of resurrecting ancient ones.
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Jun 8, 2011
What are the benefits to upgrading to F15 from F14 if any? Has there been some huge step forward in performance, security or some other reason that makes it worth while to upgrade? I know many people make the move simply because they wish to have the latest and greatest, but is there any reason specifically to upgrade to the latest and greatest?
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Mar 10, 2010
Now a dayz I am observing that mUbuntu performance was not satisfactory. My ubuntu is daily up to date. What was the reasons for my Ubuntu becoming slow?
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Feb 15, 2011
when i try to run a program in linux it runs and prints some messages successfully but in the middle it shows the message 'Killed' and stops running. what may be the reasons for this..?
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Jul 1, 2010
I was trying to install subversion on my machine which have lenny installed on it but when I tried to forward port 22. I got a message connection refused and when I tried to open it in iceweasel it shown me that the port has been restricted for security reasons. I wish to enable it but don't know how to.
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Aug 5, 2011
My web server does not currently run Suexec. All files within the /var/www directory are owned by vsftpd and belong to nogroup. Apparently, this setup causes issues with some scripts that attempt to upload files and change files, such as the SMF Forum package.
Here's some background information that goes into further details regarding the issues I'm having:[URL]..Why would uploading a file using PHP in SMF not work with the owner being vsftpd belonging to the nogroup when the folder has been chmod to 777? I tested my own simple PHP upload script, and it was able to upload a file without issues. Yet, I've been told that my server is improperly configured if I'm not using Suexec. Why is this? Also, if I did use Suexec, what creates the users? Would I have to add them manually, or would they be created automatically as users based on their FTP login and added as subusers to the vsftpd group? Why should I use Suexec? I don't understand what's wrong with my current setup. How does it work in terms of users? Are users created and just added to a subgroup, or are they created like normal user accounts on the actual server? Do they get their own /home/username directory as well? I'm so confused about Suexec. What I've read about it doesn't make sense.[URL]..
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May 23, 2010
Has anyone experienced random wireless dropouts? Like one minute, you are connected and then not, with no obvious reason as to why it happened, just network manager popping up requesting a password to reconnect.
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Jan 7, 2010
I've recently built a VM appliance using Ubuntu 8.04 that is given to customers for an easy deployment of our software. Ubuntu works great in a VM and its perfect for our software (which is a web application).
Some customers are paranoid (rightfully so) and they will run a vulnerability assessment on the web application. A particular customers' assessment fails as it finds that the appliance isn't running the latest version the Apache web server. I thought that just running "apt-get upgrade" would upgrade all of the software packages to the latest so that failures in the assessment caused by outdated software packages would be resolved... However this is not the case...
I realize that there is a probably a whole process for submitting/approving the latest versions of software packages in Ubuntu, that then get pushed to the repositories - But how does this work? What exactly does "apt-get upgrade" do if it doesnt upgrade packages to the latest?
For example: I need Apache 2.2.11 to fix a particular vulnerability. But when running apt-get upgrade, it doesnt actually upgrade the Apache version number (or any of the other packages). I'm stuck on Apache 2.2.8, and I can't find a .DEB installer for 2.2.11 or later.
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Dec 16, 2009
my partitioning layout was as follows
Vista Recovery
Windows 7
GRUB
Extended
-->Fedora 12 (ext4)
so, I shrunk my recovery in Windows 7 successfully, and booted into my Fedora 12 live cd to run Gparted, and move the partitions so that the free space could go towards fedora, I did such, and then I couldn't expand the partition to my dismay. Next, I woke up this morning, tried to boot to fedora to run SSH, grub loaded, but when I tried to boot fedora, I got the "File system check failed" error, and when I tried 7, it just went to a blank screen with a single "_" in the top left-hand corner.
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