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• Change Linux console screen blanking behavior

  - by quack quixote

  How do I change the screen blanking behavior on Linux virtual terminals? For example, if I switch to a VT from X, login, and leave the system alone for 5 minutes or so, the screen will blank like a screensaver. It comes back with any keypress, like a screensaver. Mostly I just want to change the timeout, but I'm also interested in other settings. If it helps, one of my systems is running Ubuntu 10.04 with the stock graphics drivers. fbset shows the console using the radeondrmfb framebuffer device.

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• Arch Linux shows a blinking cursor instead of a booting installer

  - by fakedrake

  Arch Linux shows a blinking cursor instead of a booting installer. I ran sudo dd if=archlinux-2010.05-core-i686.iso of=/dev/sdb1 and checked the MD5 sums. I tried to boot it on two different PCs and got the same result: instead of booting GRUB — or anything useful, for that matter — it just showed a blinking cursor at the top left corner of the screen. The machines became unresponsive to any kind of input, the flash drive LED didn't seem to blink or shiver at all and there seemed to be no other activity whatsoever. I tried using another flash drive, but the machine completely ignored it, booting Windows "normally."

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• Mac sees mangled filenames from Linux SAMBA share

  - by me2

  Certain filenames in my SAMBA shares from Linux are not getting transmitted properly. It's certain files in certain folders and it doesn't affect all folders or all files within a single folder. I can find no discerning pattern to the mangling but hoping that this is a known problem. No amount of reboot, restart, etc. will fix this problem. The filenames, when they get mangled, all end up in this form: 0JY4B3~H.M4V 0MBS1O~M.M4V 0NKDX9~R.M4V 0O0ZTA~A.M4V These are MPEG4 files. The extension remains intact. Any ideas?

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• GUI frontend for octave on Linux

  - by Homunculus Reticulli

  I recently installed Octave on my Ubuntu 10.0.4 LTS box. Out of the box, this is a console only app. This makes the learning curve a bit steeper than what I would like it to be, and I am looking for a GUI frontend that looks more like Matlab. I have seen a few project (QtOctave etc), but most of them seem either discontinued, no longer under active development, or are no longer free. Can anyone recommend a good open source/free GUI for Octave on Linux? Preferably, one that is as close as possible to Matlab's GUI.

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• winkey + arrow key doesn't move windows to 2nd monitor on linux

  - by Berry Tsakala

  in Windows, win+ <-- and win+ --> snap any window to the left/right side of a monitor, and if pressed again, snap the window to the other monitor, in multi-monitor environment. when a window is maximized, it will "restore" the window first, and at the next win+ <-- key the window will snap. this is very easy to use and remember. But on Linux a maximized window is not affected by win+ <-- , and the user must explicitly un-maximize it (win+down. the window is not moved to another monitor a side-snapped window cannot be resized - it behaves like a maximized window. is there another program that behaves like Windows, or I should write one by myself? (i'm using ubuntu/mint)

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• linux migration/N high cpu consumption

  - by Alexander

  on my linux appliance based on 3.0.0-14 kernel I got: RPN:/tmp# ps axuf | grep migration root 6 92.9 0.0 0 0 ? S Apr23 2788:33 \_ [migration/0] root 7 99.7 0.0 0 0 ? S Apr23 2993:20 \_ [migration/1] my top is RPN:/tmp# top -b -n1 top - 12:03:41 up 2 days, 2:18, 5 users, load average: 25.76, 25.26, 24.73 Tasks: 171 total, 1 running, 168 sleeping, 0 stopped, 2 zombie Cpu(s): 14.0%us, 12.6%sy, 0.8%ni, 72.0%id, 0.3%wa, 0.0%hi, 0.3%si, 0.0%st Mem: 1543032k total, 1264728k used, 278304k free, 25308k buffers Swap: 0k total, 0k used, 0k free, 183168k cached My question: why processes "migration/N" take so much CPU?

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• uninstall mysql on linux with plesk

  - by Arsenal

  I'm having trouble uninstalling linux on my centOS 4 that has plesk. I'm actually trying to upgrade my Mysql 4.1 version to Mysql 5.0 using the following command: yum update mysql I get an error list of conflicted files however. When I try to remove mysql 4.1 and perform a clean install but when I use yum remove mysql* It deletes all of its dependencies and appearantly some of these are files needed by plesk, which causes my plesk to stop working. A did a full restore and everything is okay now, but how can I remove mysql without ruining plesk? I have also tried: rpm -qa | grep mysql to get a list of all files and remove them one by one, but there's a duplicate in that list, so I can't delete those (because it says it doesn't know which one to take). Any help would be greatly appreciated!

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• boot failure trying to install linux distro from a cd

  - by jdamae

  Hoping someone can help me get this installation from a cd going. I'm using an older pc: hp pavillion 2.66Ghz, 512RAM with a BIOS revision of 6/30/2003. I reclaimed some an older drive (Seagate ST340810A) that seems to be working as its recognized in the bios (auto-detected) I downloaded a mini.iso of ubuntu 10.10 that I want to install and burned the image to a CD for install. My boot sequence is: First Boot Device [CDROM] and I disabled devices 2-4 so I can just force it to read first from the CDROM. This old pc also has a separate CD writer which is a Sec.Slave, so the Sec.Master is the Toshiba DVD/ROM DSM-171 drive where I placed the burned cd with the linux distro. So, with these settings I cannot get it to boot. I get the "DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER". Where do I go from here? Thanks.

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• linux: accessing thousands of files in hash of directories

  - by 130490868091234

  I would like to know what is the most efficient way of concurrently accessing thousands of files of a similar size in a modern Linux cluster of computers. I am carrying an indexing operation in each of these files, so the 4 index files, about 5-10x smaller than the data file, are produced next to the file to index. Right now I am using a hierarchy of directories from ./00/00/00 to ./99/99/99 and I place 1 file at the end of each directory, like ./00/00/00/file000000.ext to ./00/00/00/file999999.ext. It seems to work better than having thousands of files in the same directory but I would like to know if there is a better way of laying out the files to improve access.

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• Linux: disbale USB without disabling power

  - by Ergot

  TLDR I want toggle between the following usages of a usb-port via the terminal: use like a normal usb-port only supply energy to charge Story I recently got me something like a magna doodle that can save your drawings to pdf, which can be moved to your computer via usb afterwards. Now the thing is that you can't save anything while it's plugged in. Because it's the only way to charge it, it bugs me that I can't find a software solution and laziness I want to keep it plugged in and toggle the connection to the computer only when needed. I noticed that it's charging and usable when it is plugged in and the computer is shut down or suspened. So I guess that there's a way to do it. Tech info computer: ThinkPad X201 Linux Kernel: 3.14.5-1-ARCH "Magna doodle": Boogie Board Sync

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• Remap arrow keys to win+ijkl on linux

  - by Pengin

  I'd like to remap arrow keys to windows key plus ijkl. I can do this easily in Autohotkey on windows, but I'm struggling on Linux (Ubuntu lucid). I'd really like the solution to work independently of whether I'm using a window manager or not, and to involve modifying as few files as possible; I work on a lots of different machines and am always building new ones, so would like to minimise reconfig effort. I've tried to understand .Xmodmap, but couldn't make it work (was hard to find detailed docs on modifier keys). (Am also considering win+hjkl, but am probably not that hardcore)

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• Java sound doesn't work under Linux

  - by Cliff

  I just installed Fedora 12 and after downloading and running the Java Sound Demo I get exceptions. If I run just a vanilla Java program that plays a .wav file it runs silently with no sound and no exceptions. Every other app seems to play sound. I also took some advice from this thread in the Ubuntu forums which almost seemed to work. (Installing aoss got rid of the initial exceptions in the sound demo but I still hear nothing when I play.) I'm getting frustrated by the individual hoops I have to go through to eek sound out of my speakers when running Java apps on Linux platforms! Can somebody help me figure out what's wrong?

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• How to allow users to transfer files to other users on linux

  - by Jon Bringhurst

  We have an environment of a few thousand users running applications on about 40 clusters ranging in size from 20 compute nodes to 98,000 compute nodes. Users on these systems generate massive files (sometimes 1PB) controlled by traditional unix permissions (ACLs usually aren't available or practical due to the specialized nature of the filesystem). We currently have a program called "give", which is a suid-root program that allows a user to "give" a file to another user when group permissions are insufficient. So, a user would type something like the following to give a file to another user: > give username-to-give-to filename-to-give ... The receiving user can then use a command called "take" (part of the give program) to receive the file: > take filename-to-receive The permissions of the file are then effectively transferred over to the receiving user. This program has been around for years and we'd like to revisit things from a security and functional point of view. Our current plan of action is to remove the bit rot in our current implementation of "give" and package it up as an open source app before we redeploy it into production. Does anyone have another method they use to transfer extremely large files between users when only traditional unix permissions are available?

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• CPU and HD degradation on sourced based Linux distribution

  - by danilo2

  I was wondering for a long time if source based Linux distributions, like Gentoo or Funtoo are "destroying" your system faster than binary ones (like Fedora or Debian). I'm talking about CPU and hard drive degradation. Of course, when you're updating your system, it has to compile everything from source, so it takes longer and your CPU is used at hard conditions (it is warmer and more loaded). Such systems compile hundreds of packages weekly, so does it really matter? Does such a system degrade faster than binary based ones?

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• Linux Mint loses Window Focus

  - by Chris

  I recently installed Linux Mint 13 64bit with Cinamon Desktop and run into a weird problem. It's about losing Mouse-Focus if more than one Window are open. For Example, I open up Chromium, play around a little bit, and then, if I try to open any Programms from the Taskbar, I cannot click on it. It seems that Chromium won't free his Focus. Another Example, if I open two Windows (e.g. Chromium and a Terminal) and I work with Chromium, then click into the Terminal I get no Focus to it. Sorry, its a bit hard to explain.

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• Where to find Linux drivers for my notebook

  - by smwikipedia

  Perhaps it is not proper to post on this forum. Sorry for any inconvenience. I have finally make up my mind to use Linux (Ubuntu 10.04) as the SOLE operating system on my notebook. The last obstacle is that where to find proper drivers for my devices? Such as: ATI Xpress 200M Video Adapter Texas Instrument SD Card Reader And many more... Could someone give me some advices on where to find these drivers? Many thanks.

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• Account not getting completed deleted within linux

  - by lbanz

  I've got a nas box running some flavour of linux 2.6.31.8.nv+v2 with an arm processor. It has got a samba share called 'all' that has full read write access to everyone. However one Windows machine cannot access it without prompting for authentication and I found out from the logs that the windows account matches a local account on the nas box. What I then went to do is delete the local account on the nas. I can see that /home,/etc/password + /etc/shadow the account doesn't exist anymore. However the samba logs, shows that it thinks it is still there as it says account is disabled. I've tried rebooting both nas + windows box. Is there somewhere else that it stores account information? I logged on with a different account on that Windows machine and I can access the share fine. The smb logs shows that it can't find the user and then allows anonymous access.

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• LInux (Ubuntu Karmic) equivalent to Pawsense

  - by LRE

  I now work from a home office - much to the delight of my cats. One in particular likes to come for a hug several times a day. That in itself is fine but he tends to sit on my laptop keyboard whilst I'm working on my desktop and vice-versa. Also he'll walk across any keyboard I'm actually using at the time. I've found Pawsense and would like to know if anyone can suggest a Linux equivalent (or some incantations to achieve the same). Training him out of sitting on the keyboard is likely to prove fruitless (a suggested here). He's far more pig-headed than I am. This conversation discusses some utilities like xlock et al but I'd prefer if possible to have something more along the lines of Pawsense that doesn't lock the keyboard but "simply" intercepts cat-like typing. Thanks

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• linux xorg dual different monitors mouse border

  - by Metiu

  If I hook an external monitor to my Linux laptop and configure it for dual head with the Gnome system tools, I do get them configured with the proper resolution and position (one to the left of the other) The mouse pointer, however, will apparently use the greatest of the two vertical resolutions. This way, when I move up to the top border, the mouse exits the visible screen, traveling in empty space, and this is quite annoying, because you can't go to the upper panel just by going up very fast. Is there a way of enforcing the right resolutions for the mouse, too? Thank you

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• Install multiple Linux OS using WUBI

  - by soul

  I want to install Linux Mint, and Ubuntu on my laptop using Wubi installation. I already installed Ubuntu, but when I launch the Wubi installer for Mint. I got this guy: Does it mean to say that I can only install one os using the wubi? Do you know of any solution to this problem, except by installing mint using the usual way. I have XP and Windows 7 installed on the machine. That's why I'm using Wubi so that I won't get into troubles.

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• Install Linux with two hard drives

  - by rdecourt

  I've a machine with two hard drives. The first one has 80 GB and the second has 120 GB. I'm about to format this machine and install Linux, and I want to install all the main partitions (/, /boot, /usr/, etc.) on the first hard disk drive (sda) and mount the /home and /var partition on second disk (sdb). Is this possible, and do I have to do something after the instalation? Or is the second hard disk drive automatically mounted? How can I do it? I won't do it, but is there any problem to mount /boot on the second hard disk drive? I'm using Ubuntu 12.04.

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• VirtualBox: Grub sees hard drive, Linux does not

  - by thabubble

  I installed Linux on my second hard drive. I can boot to it just fine. But when I try to boot it from a Windows 7 host using http://www.virtualbox.org/manual/ch09.html#rawdisk, grub sees it and can load vmlinuz and initramfs. Log: :: running early hook [udev] :: running hook [udev] :: Triggering uevents... :: running hook [plymouth] :: Loading plymouth...done. ... Waiting 10 seconds for device /dev/disk/by-uuid/{root UUID} ... ERROR: device 'UUID={root UUID}' not found. Skipping fsck. ERROR: Unable to find root device 'UUID={root UUID}' It then drops me into a recovery shell. I checked "/etc/fstab" and it's empty, there are also no sd* devices in dev, the only thing in /dev/disk/by-id is a VBox CD device. I'm not too good with these kinds of things so help would be greatly appriciated.

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• Linux: Automatically switch to external monitor (VGA)

  - by peoro

  I've got an eeePC with a really tiny monitor, so whenever I go (home, faculty, parent's home, friend's home, ...) I attach it to any external monitor I can find. If it matters my system is like this: Archlinux Linux 2.6.36 Xorg 7.6 X server 1.9.2 Intel Corporation Mobile 945GME Express Integrated Graphics Controller (fully accelerated by intel modules) When I boot up the system, it uses the integrated monitor (LVDS1) only, and I have to manually manually switch to the external monitor (VGA1) using xrandr. Is it possible to configure my Xorg (or whatever) so that it uses the VGA1 output if present?

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• Linux - File was deleted and then reappeared when folder was zipped

  - by davee9

  Hello, I am using Backtrack 4 Final, which is a Linux distro that is Ubuntu based. I had a directory that contained around 5 files. I deleted one of the files, which sent it to the trash. I then zipped the directory up (now containing 4 files), using this command: zip -r directory.zip directory/ When I then unzipped directory.zip, the file I deleted was in there again. I couldn't believe this, so I zipped up the directory again, and the file reappeared again but this time could not be opened because the operating system said it didn't exist or something. I don't remember the exact error, and I cannot make this happen again. Would anyone happen to know why a file that was deleted from a directory would reappear in that directory after it was zipped up? Thank you.

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• Most secure way to have IPtables auto-loaded using Debian / Linux

  - by networkIT

  I'd like to know the safest way to load iptables using Debian. Of course, I can use a script that uses iptables-restore : #!/bin/sh iptables-restore < /etc/firewall.conf but : 1) where is the safest place to have it loaded ? /etc/network/if-up.d ? I'm concerned about the script being loaded early enough at boot time, and reliably enough when plugging/unplugging interfaces ... 2) is this script method using iptables-restore the most secure way ? 3) additionnally, how much does the answer validity stretch to other Linux distros ( Ubuntu, Fedora, CentOS ) ? Thanks ^^

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