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  • High system cpu load (%sys), system locks

    - by Mark
    For the last two weeks we are having intermittent severe spikes in system cpu usage (shown as %sys), which last for maybe half a minute, locking most processes, including ssh. I've been trying to figure this out, but atop doesn't show anything relevant (system usage for processes it shows is insignificant), spikes are intermittent and I could not reproduce the spike using any workload for the web application this webserver hosts. If you have any ideas on how to debug high %sys and (sometimes) %si CPU usage, please share them. System specs (don't know if any of this is relevant): Dedicated server, CentOS 6, core i7 950, consistent 4 to 8 GB RAM free at any time, hard drives are in RAID-1. Additional info: dmesg output doesn't change between spikes /var/log/messages doesn't change between spikes Here is cat /proc/vmstat Here is output of mpstat 1 during a typical spike Add 07.11.11: looks like simple reboot restored system state, and we might never know what caused the disturbance in first place.

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  • Netbook won't boot after using EasyBCD

    - by TNC
    I have an Asus T91MT netbook on which I used to have Windows 7 Home Premium and Ubuntu 10.10 installed (dual boot). After trying to upgrade to Ubuntu 11.04, Ubuntu is no longer able to boot, so I tried to uninstall Ubuntu completely and then reinstall it. Following these directions, I tried using EasyBCD to bypass the GRUB2 bootloader so that after uninstalling, it would automatically boot into Windows 7. However, after doing the "install BCD" step and restarting, I got the following message: Windows failed to start... File: \Boot\BCD; Status: 0xc0000098; Info: The Windows Boot Configuration Data file does not contain a valid OS entry. I'm currently trying to create a USB stick of the Windows Installation disc but in the mean time, I can only boot from a Ubuntu USB stick. Is there anything I can do from within Ubuntu to fix this? Or does anyone have any other suggestions/solutions?

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  • Cannot access internal website after being connected to other network

    - by Dandroid
    I have a client who claim they cannot access their internal website when they have e.g. been out traveling. They have to reset their browser settings every time to be able to get access again. As they live on another continent and timezone it's hard for me to run live tests with them to see what changes in their browser settings. My first guess would be it's some sort of Proxy related issue, but I want to know if there could be other reasons for this? It's not the LAN itself, that we are sure of. It's browser specific only. Edit It's worth mentioning that it only happens when they turn off/restart their computers.

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  • linux system problem

    - by snakec
    very first thanks to u all for Ur support. I'm quite new to Linux .i know how to install software but i don't know 1: how to install library .a or .so files i: how to install tar.gz i use the method like ./configure. make make install but most of the time i got the message nothing to make .in lots of tar.gz there is no installation document no make file no .configure file that make me quite confused how to install them or run them now i got sample source code of cuda i got them in tar.gz form when i extract them i found a folder in folder i found folder like c ,doc,shared etc when i open each folder i found more folder n file like that src, doc common ,lib, in these folder i found source code file header files libraries file make files i don't know how to run this kind of project can the be installed on the system how to run them they don't have .run file or script they don't have configure file can any one explain me how to compile them ,how to run them & how to install them

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  • What could be causing LVM errors on first boot after install in Debian?

    - by ianfuture
    Hi, I've installed Debian (lenny) on a machine at home. It was set up during install to have a /boot partition, then the rest was encrypted, then had an LVM ontop of that, then all the other partitons inside LVM. After install completed and on first boot it asked for password to un-encrypt(same password for both drives) then it showed an error which said LVM could not find a physical device with a particular UUID or something similar. LVM install is over two HDs. One is 120GB and one 40GB. 120GB is Master on its IDE cable and this has /boot on it. 40GB is slave on the other IDE cable. Is there anything that could be done to rescue this install? Or diagnose problem? It took ages to get installed due to time spent enrypting drives and I'd rather not go through that again. :( Thanks.. Ian

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  • Rewrite 2 different directories with htaccess?

    - by jason
    I have a tricky problem (for me at least). I'm trying to rewrite / to a folder /webroot/www. I have some simple code and it works: RewriteRule ^$ /webroot/www/ [L] However at the same time if the URL starts with components, followed by anything else (ex. foo, as in /components/foo), and foo is an actual directory that exists inside components, I should rewrite to /components/foo/www instead. How can I achieve that? I can't seem to figure it out. I'm using Apache with .htaccess.

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  • Windows 7 / Internet Explorer 8

    - by Rene
    I am a shop owner at zazzle.com. About six weeks ago, when my computer was running on Windows XP/IE7, my sites, as well as zazzle's homepages went out on me. I can only see part of each page. Since that time, I have a new computer running Windows 7/IE8, thinking that would solve the issue. It did not. Zazzle's emails told me to download Firefox and/or download Internet Explorer 7. I tried Firefox and was getting a different problem at the zazzle site. Now I was getting only the 'view source' pages on zazzle's homepages and my own shop sites as well. Question: Can I download IE 7 onto my IE 8 computer? Can this be done without loading that compilation of internet explorer 1 through 8? What do you think is the best solution to this problem?

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  • When does a cached website refresh?

    - by user142485
    If i go to example.com [placeholder for different website] it creates the numerous cache entries in the browser for different items on the page and two entries for example.com. One of which expires in 1.5hrs and the other has 'No expiration time.' What I am wondering is: when does the browser display the cached page and when does it get the newest version from the server (when re-visiting the site)? What do the two different expiration times for the top level domain mean? A web page I went to was temporarily redirecting to a different page. After it was back up, I was still getting redirected to the temp page even though the correct page was up. Would this have eventually resolved itself based on expiration times or does the cache need to be cleared?

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  • IIS FTP server not working after purchase of SSL certificate

    - by Chris
    I've been connecting to my web server with active mode in FileZilla with no problems. Over the weekend, an SSL certificate was dropped into a folder that I access with FTP, and which contains files for the website. Now I am receiving a 425 error in active mode on the FTP root, so I can't really do anything but log in. In passive mode, I can connect and move around in the directory tree, but the connection seems shaky. Occasionally I'll time out, and I can't get access at all to the folder containing the SSL certificate. My question is how does the SSL certificate affect my FTP connection (if at all)? Does its presence demand the use of FTP over SSL? Note: As far as I know, the only change which occurred was the placement of the SSL certificate. Firewall settings, FTP client and server settings should all be the same as before, when everything was working.

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  • Backup software for Ubuntu - which one?

    - by Industrial
    Hi everybody, I have spent some time testing out different backup solutions for my small home office during the last weeks, but still haven't found anything that have been working out too well yet. We can definitely work with a non-GUI script if that's what it takes, if only the requirements are fulfilled: Upload to Amazon S3 Europe. We get unbelievable slow uploading speed to US, so uploading 400+ GB of data will not be happening anytime this year... Incremental backups - only changed files shall be uploaded or we will have a big bill from Amazon in the end of each month.. Files should not be uploaded in one big per-folder archive. This is not efficient at all, since if we change one file in a subfolder, a huge two-digit GB sized file would have to be uploaded during next backup. Not good for economy again, or traffic overhead on our internet connection. What options are available to us? Thanks!

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  • MySQL server hangs after approximately 1 month (CentOS)

    - by user25061
    Hey guys, I've got a web server running Apache/PHP and MySQL (CentOS), and MySQL seems to hang once every month or so. As far as I can tell, there are a few slow queries that are being resolved, but other than that I can't really see any reason why MySQL would hang. I'm having problems determining the problem - nothing is showing up in /var/log/mysqld.log, and again there are a few slow queries, but nothing out of the ordinary. Load is average at the time of the crashes... Can I please get some hints on how to work out the issue? I can't reproduce on our staging environment, so I'm a little stuck.

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  • Option and command keys in Mac OS X are swapped and keyboard preferences do not set them back.

    - by bikesandcode
    On my MacBook Pro, I occasionally use external keyboards, generally Windows ones and things have been fine. Yesterday, I plugged in a new one, remapped the command/option keys so the windows/alt keys were in the same configuration, again, nothing new here. However, this time when I unplugged the USB keyboard, the laptops option/command keys remained switched. More annoying is that if I go into the System Preferences - Keyboards - Modifier keys, remapping the keys to actions does not work. I can use the drop downs to disable any specific keys, but switching the behaviours does nothing. (Cmd/Option obvious, tried remapping anything to caps lock and a few other combinations, no joy. Restore defaults set the configuration to what I'd expect, but the settings are evidently ignored.) So: Any ideas?

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  • Run Photoshop on VM (virtual machine) to increase calculation power, without violating the licence agreement (EULA)

    - by mecplusultra
    A question concerning the possibility to run Photoshop as VM without violating the licence agreement (EULA) : My Adobe Photoshop is bloody slow, nd sometimes I need to launch thousands of image calculations that have to use hundreds of PSD templates. I want to increase my Photoshop calculation power by creating non-persistent virtual machines on my hosted server. Each VMm would only alive for a few seconds, just enough time to deliver the calculated file. Is this a violation of the EULA? I must clarify that I'm the only one to access my non persistent VMs.

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  • Windows batch file reference to own directory

    - by rwallace
    Suppose you have C:\foo\foo.bat which needs to refer to C:\foo\foo.txt. It may be run from a different directory, but needs to get foo.txt from its own directory, not the current directory. Obviously this could be done by putting the full path C:\foo\foo.txt in foo.bat. The twist is, it's not known at the time of writing the batch file, where it will end up residing on the user's machine, so what the batch file actually needs to do is get foo.txt from the directory where I live, wherever that happens to be. (In a C program I'd use argv[0] but that doesn't seem to work with batch files.) Is there a way to do this?

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  • Keyboard not responding on startup

    - by Mestika
    I’m having a weird problem with one of the laptops at my work. Every now and then (not a systematic repeating pattern, but kind of random) the keyboard will not function on start up. The computer boots and it gets to the CTRL + ALT + DELETE screen and it is responding to nothing from the keyboard. The mouse works fine. I then try to force a shutdown and reboot the machine and most of the time it then works. My first thought was that it was a hardware malfunction with the keyboard hardware but it seems strange that the computer can be stationed for several days without being removed and it still “loses” connection to the keyboard. The OS is Windows 7 Pro and it is a Dell Laptop Vostro. Does anyone experienced this kind of problem with a laptop with/with out Windows 7 and maybe got a solution to the problem?

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  • How to prevent Google Toolbar being installed in Portable Firefox?

    - by HyperHacker
    Recently, the campus computers installed Google Toolbar in Firefox. Now, I have no use for this toolbar, so I don't want it there. For that and other reasons, I installed Portable Firefox on a USB stick and use that instead. Somehow, when I log into one of these machines and start Portable Firefox, guess what? "Thank you for installing Google Toolbar." No! I don't want some IT guy choosing what extensions to install on my personal Firefox on my USB stick. I can uninstall it but next time I log in, it comes right back. I suppose PF is for some reason reading things from the local disk, or there's some kind of background process installing it? How do I prevent extensions being installed without my consent?

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  • How to remove .htaccess virus? [closed]

    - by bleepingcrows
    Possible Duplicate: My server's been hacked EMERGENCY First time posting so bear with me please! My friend's site has been hacked and the .htaccess file (which I really know nothing about) has been injected with a malicious redirect that forces search engines to the see the site as a "harmful website." If you look at the .htaccess file you can see it's Russian or at least ends in .ru. Seeing as I know very little about this stuff, I simply tried to restore the good .htaccess file back with his host. This doesn't work as the virus just recreates the infected .htaccess file. When I searched through the rest of his directories, I can see the same bad .htaccess file in most of the folders. I can't seem to help him get rid of this virus.

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  • How to prevent nginx from appending the location to root? [duplicate]

    - by simonszu
    This question already has an answer here: nginx location pathing issue 2 answers I want to serve an Icinga Webview via nginx. This webview should be accessible via myserver.com/icinga (as the debian autoconfig for apache will do). I have the following lines in my nginx config: location /icinga { root /usr/share/icinga/htdocs; index index.html; auth_basic "Restricted"; auth_basic_user_file /etc/icinga/htpasswd.users; } However, i get an error 404 and a log entry that says: *10 open() "/usr/share/icinga/htdocs/icinga" failed (2: No such file or directory), So it seems that nginx appends the location value to the root value. I think i figured it out how to prevent this some time ago, but i did not document it for myself and have forgotten how to do it. And now i can't fix it for myself. Can you tell me how to prevent this behaviour?

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  • a friendly elaboratation on how iceweasel misses as recent request was discovered in post tut

    - by v3x3n
    I would like to specify what you asked about in how iceweasel misses on in hopes that you are interested in considering the answer to be valid considering the package should run efficient to a novice user especially when getting a first impression on a new software, browser, or package they are given by default. First let me say that I am very grateful for all debian has and continues to do for its user base and I am not complaining, only hoping that in mentioning such it will eventually aid in improving the disappointing experience iceweasel gave me in multiple ways right from the start of using it. I am sure tremendous amounts of hard work went into making it work as well as it does, and tremendous effort continues to go into IW like the rest of the package and distros such as this... Having said that, I do aim to keep my examples simple as possible but also explained in enough detail as to not leave out important info to get a full idea of my issue... (Thanks for understanding if I sound novice to debian, I am but continue to learn and advance by trial and error each day, and of course the wonderful help from all the great minds available here and there)... Well, my bone to pick (unfortunately as I disdain being a complainer when so much has been done for us, the end user) with IW is mainly 3 immediately noticed problems in offering me a smooth test drive (completely normal browsing conduct of your average user, I should indicate) as soon as I started out a task using IW (heading directly to google images and searched for a few web sized images, then saved a few (no more than 800 to 900 in dimensions, typically a normal procedure I would imagine) I experienced a horrendous reoccurring freeze and lag time that almost left me to kill the process more than once on each attempt and continued to compound so that by a few attempts later, even 1 single image save locked up the entire browser, ultimately giving up on my procedure in its simplicity with a bit of aggravation, if there was something I had done wrong on my end pre-attempt or during installation. Secondly, visiting video player sites in this case youtube will not allow for any video feed to play whatsoever and again, experienced a slight freezing that eventually dissipated as long as I didn't attempt to press play or reload another video trial... Very annoying and possibly related to my first issue (which could rely on my own lack of knowledge in setup config, but that troubles me if so).... Lastly as another user has stated already, in which brought you to ask them what exactly seemed to be the problem in the first place is also my final straw that broke the weasel's back, leading me here to find a solution to a updated version of firefox... being that iceweasel (an apparent build of firefox 17.x.x) leaving the user to find themselves out of luck when installing their favorite or much useful add-ons or plugins that aid their task or normal usage online.... As the other user clearly stated... there is almost zero options and barely any luck to find compatible plugins with such an outdated version still being used... I can only imagine if as a novoice or standard user to linux... and beginner to debian (which I am all for btw!) if I am discovering major conductivity issues which hinder normal user conduct right off the bat... that there is probably a bundle or more of security vulnerabilities that would unravel to me if I continued to give mr Hommey's package any further attention, or interest in continuing to use... This is a deal breaker on any account, unless all 3 of these issues stated are due to a very n00berish setting or lack thereof (which if that is the case, such was not properly stated for beginner in any place available by following installation tutorials such as LVM installers, which I felt lacked a clear understanding to someone who is trying to learn why and how, rather than, a fix to a potentially broken out of box installation... I really think that is irrelevant in any case however, as there is much step by step support regarding that kind of thing, just saying... its very challenging, along side a job to keep deadlines on, and the need to learn a better and more costomizible system, that was not as popularized when I became a dev via windows (OK OK I know thats a huge mistake and now I am way off original topic but anyway) Thanks very much for taking the time to read over this, and I hope it honestly gives you a few good and valid reasons for users wanting and seeking a way to get around iceweasel altogether... Finally, if I am missing something vital that renders all I've stated invalid or useless, please feel free to shove that elephant in the room my direction! Thanks for all you do, as I am sure it is very useful and dedicated, being you are a debian maintainer, and super user! Much love for intelligence, freedom and sharing the secrets of the web! May it remain unregulated and a good place to grow and learn for generations to come! Stay true! Take care now! -v3x (v3x @ gmx .com)

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  • Vagrant sahara plugin - multiple snapshots

    - by BazZy
    How I can make more than one snapshot when in sahara sandbox mode? Or, can I see list of all commits I've ever made and rollback to any? Why do I need all this? I just want to setup initial VM. After that I want to compile number of packages from sources, and this takes pretty long time. So right now I thinking of this order: Setup initial ubuntu 12.04 vagrant box Snapshot this state Compile sources, install system wide rbenv (it make compilation also) Snapshot second state Start all my infrastructure experiments Rollback to any of my previous states or commit third state

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  • Should you archive documents before backing up to the cloud?

    - by gabbsmo
    I'm planning to add a cloud storage to my personal backup strategy. But now I wonder if it really is worth the trouble of compressing my documents and photos. The Open XML-format already have zip-compression and JPEG is a lossy image format. So there really isn't much benefit in compressing. 20Mb of documents become about 17Mb at the ULTRA preset of 7-zip. One benefit I can imagine is that you can shorten upload time by archiving the folders since it minimizes the number of requests that is needed to be sent to the server at upload and download. So what are your thoughts and experience in this issue? Should you archive your documents before backing them up to the cloud?

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  • What is the best Linux distro for a php web server? [on hold]

    - by benjisail
    We are planning to upgrade our hardware and at the same time we plan to reinstall all our web server from a fresh OS. Currently our web server is running on CentOS 4.7 on a dedicated server. We are using Apache, Mysql, PHP, SVN, FTP and all the needed tools for a web server managed through SSH. We plan to use a cloud server for the new web server. I don't know which Linux distro to take for this new server. Should I stay with Centos and just take the latest release 5.4 or should I switch to something else like a Debian base distro (Ubuntu Server)? The thing that I didn't like with CentOS was the none availability of the latest version of PHP and Apache on Yum. This make it harder to keep our webserver updated with the latest technologies... Thanks for your help!

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  • Sync two external harddrives?

    - by acidzombie24
    A little mishap happened earlier today and i am thinking i should have a copy of my external harddrive since 10% of it is very valuable. What is the best solution to keep two external harddrive in sync? i'll probably use one as regular and maybe use the other only to copy data. The easiest way to keep it in sync is to clear one drive and copy the other but 1T of data will take a long time. Whats a good existing app that will keep them in sync? freeware preferred.

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  • < key triggers sticky alt on Windows 7

    - by Xoundboy
    When using a code editor like Notepad++ or Eclipse I'm experiencing a rather annoying problem: each time I type the < key the keyboard latches into some unexpected mode whereby the subsequent keypress behaves as if the alt key were being held down. The only way to return to normal mode is to hit the escape key twice immediately after I type a < character. The keyboard is a Microsoft Comfort Curve 2000 and the OS is Windows 7. Does anyone have any idea what I should do to stop this behaviour? Thanks

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  • How do I know I'm running inside a linux "screen" or not?

    - by Jun Chen
    The "screen" refers to a program mentioned in How to reconnect to a disconnected ssh session . That is a good facility. But there is a question I'd really like to know. How do I know whether I'm running inside a "screen"? The difference is: If yes, I know I can safely close current terminal window, e.g., close a PuTTY window, without losing my shell(Bash etc) session. If no, I know I have to take care of any pending works before I close the terminal window. Better, I'd like this status to be displayed in PS1 prompt so that I can see it any time automatically.

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