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  • RHEL6 kick start fails with kernel panic - not syncing error

    - by mrchampe
    On a brand new (just unboxed) Dell Precision 7500 computer, I began a kickstart using a red hat boot disk and a kickstart file hosted at an http address. There is a picture of the full error below with trace information I believe this is different than the other questions relating to kernel panic errors. What I would like to know is What causes the kernel panic How does one fix this such that the kickstart finishes Additional information can be provided as necessary.

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  • Always route a keypress to an application regardless of focus

    - by George Mauer
    I have to transcribe some audio (not enough to download dedicated software but enough to put my hacker hat on) and flipping back and forth between vlc and my text editor every time I want to pause is really annoying. Is there a way to always route a key-press (for example F10) to vlc regardless of what window has focus. Bonus - I have a Makey Makey so if I can get this working I can create a pedal and it will be my first real use of it!

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  • Linux environment variables

    - by George2
    I am using Red Hat Linux Enterprise 5. I am always using export command to set environment variable. I am wondering any other ways of setting environment variables and pros/cons of all alternative ways. Any answers or recommended readings? Thanks in advance!

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  • ubuntu's average load never below "0.00 0.01 0.05"

    - by Karma Fusebox
    I have several ubuntu 12.04 VMs running on a ubuntu 12.04 KVM host. Those of the virtual machines that are totally idle with no services (except syslog and the other "small" standard stuff of a fresh installation) show a constant load of "0.00 0.01 0.05" in top/htop as average 1/5/15. When there are "real" applications running, the load averages behave perfectly normal but they never fall below the mentioned values. While this doesn't affect performance at all and could easily be ignored, it screws up the monitoring graphs in a very annoying way: (Notice how load15 behaves nicely if 0.05 for a short time in the right half of the pic) Unfortunately I don't know what diagnostic outputs might be helpful for you, so here's some default stuff: # top top - 16:31:01 up 1:05, 1 user, load average: 0.00, 0.01, 0.05 Tasks: 62 total, 1 running, 61 sleeping, 0 stopped, 0 zombie Cpu(s): 0.2%us, 0.2%sy, 0.0%ni, 99.2%id, 0.5%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 1019464k total, 73452k used, 946012k free, 6140k buffers Swap: 0k total, 0k used, 0k free, 22504k cached . # free -m total used free shared buffers cached Mem: 995 72 923 0 6 21 -/+ buffers/cache: 43 951 Swap: 0 0 0 . # iostat -x /dev/vda Linux 3.2.0-32-virtual (vm3) 11/15/2012 _x86_64_ (2 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 0.25 0.00 0.65 0.20 0.24 98.66 Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util vda 0.14 0.12 0.51 0.22 6.74 1.46 22.50 0.02 23.26 20.64 29.30 7.63 0.56 Need something else? Has anyone ever seen this behavior? Might this be a bug in kvm/ubuntu/kernel 3.x in the end? Thanks a lot!

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  • Debian or CentOS?

    - by Tres
    I am looking at using either Debian or CentOS for a production server and I've heard mixed reviews of each one. I've heard CentOS performs better under load, however I am aware that Debian has a much larger package repository. Personally, I am partial to Debian since I am less familiar with Red Hat distros, but wanted to reach out on Server Fault to see which I really should be using. Any ideas? Thanks!

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  • Ubuntu: Memory Leak

    - by Keener
    I'm having trouble finding from where this memory leak is occurring. I'm running Ubuntu 8.04 LTS on a Dell XPS M1530. I have 3GB of ram and I'm finding after about an hour or so of use top shows me 2GBs+ used. The strange thing is when I add up the memory percentages by PID either from top or ps aux I find that I should only be using about 20-25% of my available ram. What brought this to my attention was I've begun running vmware server again. Now, obviously the ram usage spikes when I load a virtual machine, but the memory VMware is using does not account for the memory usage I'm seeing via top or free. Stopping vmware server releases the memory which was allocated to it, but I'm still unable to find where this RAM is being used. After a complete reboot, of course, the memory is fine, but very quickly it climbs to 60-80% usage with the processes only appearing to account for a third of that. Any ideas where I should look for more information on what this could be?

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  • pdns-recursor allocates resources to non-existing queries

    - by azzid
    I've got a lab-server running pdns-recursor. I set it up to experiment with rate limiting, so it has been resolving requests openly from the whole internet for weeks. My idea was that sooner or later it would get abused, giving me a real user case to experiment with. To keep track of the usage I set up nagios to monitor the number of concurrent-queries to the server. Today I got notice from nagios that my specified limit had been reached. I logged in to start trimming away the malicious questions I was expecting, however, when I started looking at it I couldn't see the expected traffic. What I found is that even though I have over 20 concurrent-queries registered by the server I see no requests in the logs. The following command describes the situation well: $ sudo rec_control get concurrent-queries; sudo rec_control top-remotes 22 Over last 0 queries: How can there be 22 concurrent-queries when the server has 0 queries registered? EDIT: Figured it out! To get top-remotes working I needed to set ################################# # remotes-ringbuffer-entries maximum number of packets to store statistics for # remotes-ringbuffer-entries=100000 It defaults to 0 storing no information to base top-remotes statistics on.

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  • easy to setup FTP server on Linux?

    - by George2
    I am using Red Hat Linux Enterprise 5. I am new to this development environment, and previously worked on Windows. Could anyone recommend an easy to setup/maintain and free FTP server for my platform? I just need basic features and used by a couple of people only. Thanks in advance.

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  • Linux 2.6.24-gentoo-r3-comtrance on x86_64 high Useage for unknown reasons

    - by Dorjan
    Hello everyone, I'm a complete rookie when it comes to all things Linux related so please treat me as such and assume I know nothing. That being said my Top says this: top - 12:08:03 up 11 days, 15:36, 0 users, load average: 5.47, 5.53, 5.46 Tasks: 296 total, 2 running, 294 sleeping, 0 stopped, 0 zombie Cpu(s): 6.3%us, 1.4%sy, 0.0%ni, 71.3%id, 20.6%wa, 0.0%hi, 0.3%si, 0.0%st Mem: 8176880k total, 8118236k used, 58644k free, 89312k buffers Swap: 1004052k total, 0k used, 1004052k free, 7235652k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1229 root 15 -5 0 0 0 D 1 0.0 199:28.63 kjournald 2946 root 20 0 1716 676 552 D 1 0.0 145:02.94 syslogd 14553 root 20 0 2644 1268 876 R 1 0.0 0:00.34 top 14609 postfix 20 0 7896 1884 1460 D 1 0.0 0:00.02 bounce 14630 postfix 20 0 7896 1876 1452 R 0 0.0 0:00.00 bounce And my hard drives says: > df -k Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda3 4925556 4474836 200508 96% / /dev/sda5 489992 36090 428602 8% /tmp /dev/sda6 377951852 236171160 122581816 66% /var none 4088440 0 4088440 0% /dev/shm It has been like it for a few days now... I know not what is causing the high server load (Normally around 1.3) can anyone give any tips on how to track down the culprit? Many thanks,

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  • Laptop + External Monitor: Possible to Scale Mouse-crossover Position?

    - by Brian Lacy
    I have a laptop with a 16" screen @ 1366x768 resolution, and a 24" external monitor at 1920x1200 resolution. I'm extending the Windows 7 desktop onto the other screen. The 24" is the secondary monitor, and is positioned so the bottom of that screen lines up with the bottom of the 16" screen. Currently, if I move the mouse to the top portion of the 24" screen, then move left, the mouse will stop at the edge of the 24" screen until I move it down far enough to get into the range of the 16" screen. So that's all pretty standard; but I'm wondering if there's any software out there that will allow me to "scale" the mouse-crossover position, such that if I'm at the TOP of the 24" screen and move left, the mouse will cross to the TOP of the 16" screen, whereas if I'm at the BOTTOM of the 24" screen, crossing over will position the mouse at the BOTTOM of the 16" screen. So then, if the mouse cursor is on the 24" screen at (x,y) position (10,600), and I move 20 pixels left, the mouse is now on the 16" screen at position (1356,384). Anyone know of such a solution?? Note: I also use Ubuntu, so if there's a solution to this for X, but not Windows, I'd be interested in that also.

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  • MySQL for SQL Server DBAs

    - by SQL3D
    I've been tasked with taking over the administration of a MySQL installation (running on Red Hat Linux) that will become fairly critical to our business in the near future. I was wondering if anyone could recommend some resources in regards to administering MySQL for DBAs already experienced with other relational database (SQL Server and some Oracle in my case). Specifically I'm looking for information around disaster recovery as well as high availability to start with, but I do want to get well rounded with the entire system. Thanks in advance, Dan

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  • gunzip: invalid compressed data--format violated

    - by Arunjith
    Problem definition: I transferred a tar.gz file from a Linux machine to a Windows partition.The Windows partition has mounted with the Linux server as cifs. OS : Red Hat Enterprise Linux Server release 5 Symptom: After the copy process is successful, doing an integrity check with gunzip -t and the process get the following error: gunzip -t Backup-28--Jun--2011--Tuesday.tar.gz gunzip: Backup-28--Jun--2011--Tuesday.tar.gz: invalid compressed data--format violated And further tried to untar (tar -xvzf) and the process as well is failed.

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  • Mercurial confusion - commit / push, backouts

    - by Madmanguruman
    I'm trying to set up a repository on a shared filesystem. I'm using Mercurial 2.1.2 on a Windows-based architecture. I start with an empty folder on the shared filesystem and create a repository in it. After this, I dump in the baseline files, and add them to versioning, then commit the changes. I then clone the repository to my local hard drive. I then make a change in my local repository, commit it, then push back to the shared filesystem repository. The shared repo graph I get in TortoiseHG looks strange (to me). This is the shared repo: This is the local repo: On the shared repo, the working directory always shows up on the top, then the graph goes 'down' to rev. 0 then back 'up' again through various revisions. It looks to me like I have two different branches, even though everything is on the default branch. Also, that 'top' revision always says "* Working Directory * Not a head revision!" I noticed that in my local repository, I don't get that dangling working directory at the top of the list - everything is in one branch. I also noticed that on my local repository, I can back out the tip revision with no problem. On the shared filesystem repository, I cannot, since I get an error ("Cannot backout change on a different branch"). How can this be? Aren't they supposed to be identical to each other? Am I fundamentally doing something wrong?

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  • suggest a 'headless' linux dist that i can use to play with firefox, Xvfb and selenium RC?

    - by significance
    i'd like to build a similar replica of the virtual server i hire from my hosting company in order to test a windowless application of firefox using Xvfb. i'd like to do so using a parallels virtual machine on OSX. i'm happy to run some commands to get info but i'm pretty much a linux noob so be gentle! at the moment this is all i really know: [GCC 4.1.2 20080704 (Red Hat 4.1.2-46)] on linux2 thanks :)

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  • Python crash issue in Fedora 12

    - by MA1
    How to fix the following issue and what's the problem. Due to this problem, everything that uses python is not working. /lib/librt.so.1: symbol pthread_barrier_wait, version GLIBC_2.2 not defined in file libpthread.so.0 with link time reference Please install a package which provides this module, or verify that the module is installed correctly. It's possible that the above module doesn't match the current version of Python, which is: 2.6.2 (r262:71600, Aug 21 2009, 12:22:21) [GCC 4.4.1 20090818 (Red Hat 4.4.1-6)]

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  • Are there any web-based Linux image builders that allow selection of preinstalled packages?

    - by Series8217
    I know of one: The Angstrom Linux distribution has an online builder (called Narcissus) that allows you to select what applications you want preinstalled in the OS, then builds a working image of it for you to download and run from a flash drive. Is there anything like that for more popular distributions like Red Hat, Fedora, Ubuntu, or Debian? I think this would be particularly useful for virtual appliances and server deployment.

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  • java memory allocation under linux

    - by pstanton
    I'm running 4 java processes with the following command: java -Xmx256m -jar ... and the system has 8Gb memory under fedora 12. however it is apparently going into swap. how can that be if 4 x 256m = 1Gb ? EDIT: also, how can all 8Gb of memory be used with so little memory allocated to basically the only thing running? is it java not garbage collecting because the OS tells it it doesn't need to or what? TOP: top - 20:13:57 up 3:55, 6 users, load average: 1.99, 2.54, 2.67 Tasks: 251 total, 6 running, 245 sleeping, 0 stopped, 0 zombie Cpu(s): 50.1%us, 2.9%sy, 0.0%ni, 45.1%id, 1.1%wa, 0.0%hi, 0.8%si, 0.0%st Mem: 8252304k total, 8195552k used, 56752k free, 34356k buffers Swap: 10354680k total, 74044k used, 10280636k free, 6624148k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1948 xxxxxxxx 20 0 1624m 240m 4020 S 96.8 3.0 164:33.75 java 1927 xxxxxxxx 20 0 139m 31m 27m R 91.8 0.4 38:34.55 postgres 1929 xxxxxxxx 20 0 1624m 200m 3984 S 86.2 2.5 183:24.88 java 1969 xxxxxxxx 20 0 1624m 292m 3984 S 65.6 3.6 154:06.76 java 1987 xxxxxxxx 20 0 137m 29m 27m R 28.5 0.4 75:49.82 postgres 1581 root 20 0 159m 18m 4712 S 22.5 0.2 52:42.54 Xorg 2411 xxxxxxxx 20 0 309m 9748 4544 S 20.9 0.1 45:05.08 gnome-system-mo 1947 xxxxxxxx 20 0 137m 28m 27m S 13.3 0.4 44:46.04 postgres 1772 xxxxxxxx 20 0 135m 25m 25m S 4.0 0.3 1:09.14 postgres 1966 xxxxxxxx 20 0 137m 29m 27m S 3.0 0.4 64:27.09 postgres 1773 xxxxxxxx 20 0 135m 732 624 S 1.0 0.0 0:24.86 postgres 2464 xxxxxxxx 20 0 15028 1156 744 R 0.7 0.0 0:49.14 top 344 root 15 -5 0 0 0 S 0.3 0.0 0:02.26 kdmflush 1 root 20 0 4124 620 524 S 0.0 0.0 0:00.88 init 2 root 15 -5 0 0 0 S 0.0 0.0 0:00.00 kthreadd 3 root RT -5 0 0 0 S 0.0 0.0 0:00.00 migration/0 4 root 15 -5 0 0 0 S 0.0 0.0 0:00.04 ksoftirqd/0

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  • MDI and WPF Ribbon

    - by femi
    Hello, i noticed that the WPF Ribbon is bound to a XAML Usercontrol or window. Lets imagine i have a windws.xaml page with a WPF Ribbon at the top. I want to create an instance such that once i click on one of the WPF Buttons, i am taken to a different XAML UserControl or "page". How do i do this? Will this new page have the WPF Ribbon on the top? thanks

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  • sql query for 3 tables

    - by greffe
    i have 3 tables (A,B,C) Table A - ID Name 1 Sam 2 Manuel 3 Jane Table B ID Tab_A_ID Name 1 1 Meer 2 1 Kutti 3 2 Mikaro Table C ID Tab_B_ID Price 1 1 255.11 2 1 30.52 3 3 125.22 I need a query that shall pick up the top price for TableA-Name from TableC. So only 1 top price for 1 nae record. e.g.- Sam - 255.11 Manuel - 125.22 How can i get this?

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  • Sharing transactions between web applications, which run in the same cluster

    - by pihentagy
    We (will) have the following architecture: Base.war will be a self-contained spring-hibernate application All applications will run under Glassfish, and may be clustered E1.war will sit on top of Base.war, extending it's functionality There could be further extensions (E2.war, E3.war, …) sitting on top of Base.war Either wars could start a transaction, and transactions could span between wars Without shutting down Base.war, or any other Ex.war, it should be possible to upgrade an Ey.war Is there a solution for this with spring-hibernate-glassfish environment?

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