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• Can't write to disk

  - by nofacts

  I have seen questions similar to this, but the answers are either beyond me or the situation doesn't quite match mine. Would appreciate some direction. I recently installed Ubuntu 12.04 LTS. The OS is on a disk formatted as ext4. I added another disk to the system and formatted it as W95 FAT 32 (LBA) (0x0c). I did this because I am moving from Windows to Linux, will be needing to go back and forth with data for a while, and might need to move the disk to a Windows machine. There may have been a better format to use, but if so I didn't know any better. I was able to transfer data from an external drive to this FAT32 drive with no problem. Now, though, when I try to create a new folder or write a file to the disk I get a message that the disk is read-only. If I go to the properties, permissions for the disk, for Folder Access it says 'create and delete files'. If I try to change File Access underneath to 'read and write', either nothing happens or I get a message it can't be done. Thank you for any help.

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• VMWare Server lck file keeps coming back

  - by muncherelli

  I am running VMWare Server 2.0 on a Debian Lenny system as a host OS. I am getting this error when I try to start a Virtual Machine Cannot open the disk '/var/lib/vmware/Virtual Machines//.vmdk' or one of the snapshot disks it depends on. Reason: Failed to lock the file. So I looked around on the web and found that I need to delete the .lck folder and file in order to get this error This seems to happen any time I reboot my Debian Server. The Virtual Machines sometimes do not recover and this lck file is causing problems. Should I create a cron script that does a rm *.lck on each of my machines on reboot? Looking for any direction on how to resolve this. It seems when i do a "reboot" command it is maybe not gracefully shutting down the VMware containers so the lock files are still intact?

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• Upgrade a legacy, expired RHEL 3.4.6 server to modern Centos/Scientific Linux

  - by Gabriel Tasiopoulos

  I have a machine running a legacy J2EE app. The code is not Maven-ized and it works with pretty old Java and Postgres versions. I have converted it to a VM in ESXI and I'd like to try to upgrade it to a modern, binary-compatible version of RHEL (Centos or Scientific LInux) and see if things would still work. Where should I start? Am I being too optimistic with this one? It's more of an experiment and I'm not doing it on a production machine. But given the OS is pretty old I am looking for a way to do this eventually. Many thanks

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• Cannot Create Bootable USB Drive from .iso file

  - by tarabyte

  I've tried formatting the flash drive as FAT as well as Mac OS journaled through diskutility but still cannot successfully create a bootable drive. I'm following the directions here exactly: http://www.ubuntu.com/download/help/create-a-usb-stick-on-mac-osx Environment: Macbook Pro trying to create a bootable flash drive for a Macbook Pro. 8GB flash drive. Tested ubuntu-12.04.1 as well as ubuntu 12.20 .iso 64-bit downloads. Nothing to repair in disk utility for this hard drive. Every time I finish step 8 of the tutorial I get "file system not recognized" with the options to "initialize" meaning to reformat my drive, "ignore" or "eject." When I try to re-inspect the flash drive in disk utility after plugging it back in I see that it has some error when I try to verify it but the "repair" button is disabled. I just want to boot to ubuntu when my mac first starts up. Oh the pain. http://lifehacker.com/5934942/how-to-dual-boot-linux-on-your-mac-and-take-back-your-powerhouse-apple-hardware "linux is free insomuch as your time is worthless" - old wise man

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• Bluetooth Connectivity that an error

  - by eka anggraini

  I have a bluetooth USB, every time I enter the bluetooth, bluetooth is active only a few seconds, after which it can not be used again In 'devices and printer' there is still a bluetooth but if you want to save the settings it can not, there are error message or bluetooth is revoked. I am using windows 7, whereas if use Windows XP smoothly no problems. This not only happens on my computer alone, my friend who has a build-in bluetooth also experienced the same thing with the same OS. Is there a patch / fix / update for its Windows? I've been brain-tweaking drivers for all but still can not.

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• How to tell if linux disk IO is causing excessive (> 1 second) application stalls

  - by noahz

  I have a Java application performing a large volume (hundreds of MB) of continuous output (streaming plain text) to about a dozen files a ext3 SAN filesystem. Occasionally, this application pauses for several seconds at a time. I suspect that something related to ext3 vsfs (Veritas Filesystem) functionality (and/or how it interacts with the OS) is the culprit. What steps can I take to confirm or refute this theory? I am aware of iostat and /proc/diskstats as starting points. Revised title to de-emphasize journaling and emphasize "stalls" I have done some googling and found at least one article that seems to describe behavior like I am observing: Solving the ext3 latency problem Additional Information Red Hat Enterprise Linux Server release 5.3 (Tikanga) Kernel: 2.6.18-194.32.1.el5 Primary application disk is fiber-channel SAN: lspci | grep -i fibre 14:00.0 Fibre Channel: Emulex Corporation Saturn-X: LightPulse Fibre Channel Host Adapter (rev 03) Mount info: type vxfs (rw,tmplog,largefiles,mincache=tmpcache,ioerror=mwdisable) 0 0 cat /sys/block/VxVM123456/queue/scheduler noop anticipatory [deadline] cfq

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• What "file system" is supported by Windows and Linux?

  - by Skiroid

  I'm setting up a media centre for my living room so that I'm able to watch downloaded films and TV shows on the big screen. The media centre is an old small computer which will have XBMCbuntu 12 installed on it. Right now, the media centre has a 300 GB HDD partitioned into two: 1) Ext4 50 GB (where I'll install the OS) 2) swap 6 GB (swap area) I'm wanting a third partition which I can store all my media on to. This partition will fill the rest of my HDD. Although, I'm stuck on which file system I should set it to. I need the file system to be fully compatible with Windows as I'm going to be removing the HDD from the media centre and plugging it into my main PC, running Windows 8, to transfer the media onto it. I can't transfer over Wi-Fi as the media centre won't be connected to the Internet. My options are: Ext4 journaling, Ext3 journaling, Ext2 journaling, ReiserFS journaling, btrfs journaling, JFS journaling, XFS journaling, FAT16 and FAT32. I know that FAT32 is compatible with Windows but it can only hold files that are 4 GB or less and my films are well over 4 GB. Some more than 10 GB. Is there a file system I can use which is supported by Linux and pops up under Computer in Windows?

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• How to manage several Linux workstation like a cluster?

  - by Richard Zak

  How does one go about managing a lab of Linux workstations? I'd like for users to be able to log in, run their GUI apps (LibreOffice, Firefox, Eclipse, etc), and for the computers to be able to be used as compute nodes (OpenMPI). This part I'm fine with. But how can I centrally deploy a new software package or upgrade an installed package? How can I reload the entire OS on a given node, as if these workstations were part of a super computing cluster? Is there a nice program to help with setting up PXE booting and image management, and remotely managing packages? Ideally such a system would work with Ubuntu. If there isn't a nice package, how could this be set up manually?

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• Booting a GPT USB key on older BIOS laptop

  - by fonix232

  I have an old HP EliteBook 8530p, which does not support booting from GPT USB (GPT HDDs are fine though). Lately I had the wish to have a fast-to-start OS for browsing, smaller web tasks, etc., so I grabbed a ChromeOS build (latest one by ArnoldTheBat), flashed it on an 8GB flash drive, and popped it in. It did not boot, so I dug deeper and discovered that it actually is GPT, and cannot be converted to MBR. As my laptop does not support UEFI booting from USB (there's a really-really beta UEFI support in the BIOS, but as I said, it only supports GPT hard drives, not USB devices), I'm stuck. Is there any way of booting it, say, another flash drive with a specific boot loader/manager (e.g. Plop)?

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• Resolution changes when using switch

  - by Edward D

  So, the "real" resolution of my monitor is 1024x768. That's what I'd use on my docked Windows laptop, and what I'd use on my Xubuntu desktop connected directly. When I connect a switch, to switch between the two, however, the ubuntu machine's resolution changes. Everything's still proportional, and it still thinks it's doing 1024x768, but the icons and fonts appear larger. Not 800x600 larger, but still big. When I used Xubuntu Precise, I created an xorg.conf file to set a resolution of 1280x1024 which made it look the way it does without the switch ... as a workaround. When I upgraded to Trusty, I lost this. I tried to re-create it, but doesn't seem to load my file. Ideally, I'd like to correct the original problem, but I'd settle for being able to up the resolution. I searched for a while, and tried to do it, but I'm giving up ... please help me out. Controller: Intel Corporation 82915G/P/GV/GL/PL/910GL Memory Controller Hub (rev 04) Monitor: NEC MultiSync LCD 1850e http://www.necdisplay.com/documents/UserManuals/LCD1850E_manual.pdf OS: Xubuntu 14.04 Trusty /etc/X11/xorg.conf: # YOU CREATED THIS FILE # sudo leafpad /etc/X11/xorg.conf Section "Device" Identifier "Configured Video Device" EndSection Section "Monitor" Identifier "NEC LCD1850E" # I found Synchronization Range at: # http://www.necdisplay.com/documents/UserManuals/LCD1850E_manual.pdf HorizSync 31.0-82.0 VertRefresh 55.0-85.0 EndSection Section "Screen" Identifier "Default Screen" Monitor "NEC LCD1850E" Device "Configured Video Device" SubSection "Display" Depth 24 Modes "1280x1024" "1280x960" "1024x768" "800x600" "848x480" "640x480" EndSubSection EndSection

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• 14.04.1 LTS 64 bit from USB does not see my windows 7 when I go to install it

  - by W J

  I suppose this is as much a question as a heads up/warning 14.04.1 LTS only gave me the option of writing over everything on one of my windows 7 machines. If I'd pushed the wrong button and continued I would have lost some mighty important items. On a similar windows laptop I succesfully installed 14.04.1 LTS 32 bit alongside windows 7 rather easily ( and I dig it!), there was a prompt in that case that let me select to install it alongside my windows OS.Yikes, not in this case. This laptop was formatted NTFS, the Ubuntu usb pendrive I formatted fat32. could be a clue? It looks like there is an advanced install ubuntu, but I am not that advanced. I may try to use windows diskformat (What fdisk is gone?) to make a partition, then see if the ubuntu on my usb stick "sees" my windows. If anybody has a better plan let me know. Mahalo AHA!? p.s. its a SSD harddrive, perhaps thats the crux?

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• How to setup Java-Home and Path in Ubuntu 12.04

  - by ur truly friend

  we are new to Ubuntu.Recently we changed my server OS to ubuntu 12.04 from windows 7 . every one have their own login details. one of my college installed Open-Jdk7. I asked him, where you installed JAVA, then he suggested to switch the following directory su root cd /usr/lib/Jvm Totally 3 folders are there in JVM folder. names are. java-1.7.0-openjdk-amd64 java-7-openjdk-amd64 java-7-openjdk-common generally, If you install Java in Windows, we will get 2 folder. 1 folder is for JDKand another points to JRE. but, in Ubuntu we have 3 folders. is it right? for my conformation, whether he installed correctly or not. I open Terminal. I run the following 2 commands javac java -version both commands are working fine. now I want to set-up Java-Home and Path for all users at same place.because everyone is working on Application server. Can anyone explain step-by-step. Thanks.

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• Can't use command line – "command not found" after editing PATH

  - by MEM

  I'm running OS X Mavericks and was trying to install MAMP PRO 2.2. I was trying to configure the PATH variable to have the PHP binaries of MAMP PRO. I added the following line on my ~/.bash_profile file: export PATH=/Applications/MAMP PRO/bin/php/php5.5.3/bin:$PATH As you may notice, since I have MAMP PRO and not just MAMP, I've added a space. As a consequence, I know have the following error each time I run the terminal: -bash: export: `PRO/bin/php/php5.5.3/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin': not a valid identifier Worst: I can't get any command to run, like: ls, clear etc. I always get: "command not found" I don't even know the absolute path for ls. How can I make the commands work again, so that I can properly fix the path I was trying to setup on the .bash_profile file?

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• Conference Calling Meetme.conf PROBLEM - Astarisk

  - by Zafer

  I am facing problem in conference calling (OS ubuntu latest) ... I created a conference Room and an extension no .. when i dial from my softphone (3cx or X-Lite) it says "YOU ARE ENTERING CONFERENCE NO 1234. YOU ARE CURRENTLY THE ONLY PERSON IN THE CONFERENCE) and then a music for a second and then shows connected... Now when i dial form another soft phone the same extension it goes to second conference room and plays the same message .. if i create only one conference room .. the second no. didn't connect to it and says no conference room. CAN some one help me out .... I just want to create a conference room OR extension where 4-5 or 6 people can call and make a conference ... i am not very much expert in linux and asterisk so simple steps to achieve my goal .. Thanks

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• Preventing SSH RSA host key warnings for change of key vs IP address

  - by Adam M-W

  I have a network with DHCP enabled, and also a computer that dual boots operating systems and has different SSH keys on each (and yes, I would like to keep different keys on each rather than copying the same identity/private key to each). Because the IP address does not change between operating systems because the MAC address is the same, when connecting to ssh, even when not using the IP address but the hostname via DNS/mDNS, I get the warning: Warning: the RSA host key for 'hostname' differs from the key for the IP address '192.168.1.172' Offending key for IP in /Users/user/.ssh/known_hosts:37 Matching host key in /Users/user/.ssh/known_hosts:38 Are you sure you want to continue connecting (yes/no)? How can I surpress the warning when the hostname differs from the IP address for that hostname, but retain the ability to check host keys are the same for each hostname? (each OS has a unique hostname)

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• Solution for lightweight LAN peer discovering?

  - by DevilWithin

  I built a library for purely cross-platform programming. My games made with it run fine in Android , Pc, Linux, Mac etc. The networking capabilities are provided by ENET library, therefore all communication between my apps is not TCP or UDP compatible, but only in the custom protocol, even tough its based on the UDP ultimately. I don't think its possible to do what i want with ENET, thats why I ask here for help! Lets say I have the same game running in my Android phone, my laptop and my pc. They are all in the same wifi network, and therefore in a LAN, whether its Wifi hotspot(?) or the household router. I need each of those 3 peers to discover the other two in the network. This is meant only to find the IP of alive apps in the LAN network, to be able to host multiplayer games between them. I can only think of one effective way to do this, UDP broadcast, wait responses, but if that is the solution, i need something small, since its the only purpose of the implementation. Other way could be to try to connect to all IPs in the LAN address subrange, but I don't think the OS would be with me on this one :p Sorry for the long question!

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• Kernel appears to have no modules

  - by George Reith

  Useful info: OS: CentOS 5.8 final Kernel: 2.6.32-042stab056.8 My kernel came prebuilt with the server, I don't know anything about kernels and not a lot about linux however as far as I do know I should have some modules loaded by the kernel. I came across this problem because I am unable to run iscsi as it is expecting certain modules to be loaded. lsmod returns nothing. depmod -a returns: WARNING: Couldn't open directory /lib/modules/2.6.32-042stab056.8: No such file or directory FATAL: Could not open /lib/modules/2.6.32-042stab056.8/modules.dep.temp for writing: No such file or directory I have rebooted and nothing has changed. Does anyone know why this is happening?

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• Mac: Script application downloaded from the Internet

  - by Svish

  I downloaded a php framework and has started to make a website using that. Sometimes I need to look at the source of that framework and every time I open a file I haven't opened before I get this message: “somefile.php” is a script application which was downloaded from the Internet. Are you sure you want to open it? That is ok and nice I suppose, but I am getting tired of it. Is there a way I can fix all the files in my web directory so that the os somehow forgets the files are from the Internet or something like that?

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• How can I remove the DRM from books I have purchased for my Kindle? [closed]

  - by Jeremy Banks

  How can I the remove DRM from books I have purchased for my Kindle? A solution that works on Mac OS X and/or Linux would be ideal, but a Windows-only solution is also acceptable. Moral aside: I do not plan to share or pirate books; I am very happy with the Amazon Kindle store and have purchased more books from there since getting my Kindle a month ago than I had in the previous two years. However, I do not feel comfortable keeping them in an encrypted format that only a single company's software will allow me to access. I may also want to convert them into a format for other readers in the future, which is not possible without first removing the DRM.

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• Windows 7 just corrupted Microsoft F# and now won't fix itself.

  - by user225626

  I lost half a year's worth of custom CGAL/GMP/LEDA/Qt3/Qt4/MPFR/MPFI/Visual Studio/Boost/blahblahblah open source nonsense with DLLs that are scattered in various parts of the OS that I had gotten to finally work. All because F#, which came with .NET 4 and which I never, ever used, is now "corrupted" one day for reasons only Windows 7 knows, and now Windows 7 won't even boot. Of course none--none--of the above setup works as accessed from the USB port. How do I remove a corrupted file that prevents a Windows 7 from booting, or even being fixed by an external CD mount of the Windows 7? Thanks for any help.

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• Text editor for Mac that will open any file

  - by Dinah

  In Windows, every text editor I encountered allowed me to drag and drop any file type into it and it opened. Apparently, Mac app developers have a different philosophy because I can't find a simple free text editor for OS X that will do this. TextWrangler came highly recommended but it can't accomplish this simple feat. Can anyone suggest one? Edit apparently on at least some editors, there is a distinction between drag/drop in the document list area vs. the typing area. In addition to the accepted answer, this is one thing to be aware of. I still don't know why it doesn't work in TextEdit, but this is true for TextWrangler and Smultron.

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• Hiera concatenated lookup from yaml

  - by Brian

  I am trying to configure the puppet-logstash module via Hiera. When I make the call to hiera('profiles::logstash::config'), the return value is a concatenated string. It tells me that it cannot convert a String into a hash. shipper.pp class profiles::logstash::shipper() { $shipper_config = hiera('profiles::logstash::config') notice("${shipper_config}") class { 'logstash': ensure => 'present', version => '1.4.1-1_bd507eb', status => 'enabled', } profiles::logstash::config { $shipper_config: } include logstash } hostname.yaml classes: - os::repo - profiles::logstash::shipper profiles::logstash::config: - {content: this is a test, order: 10} Output when used with notice(): order10contentthis is a test Did I order my YAML wrong?

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• "Unable to install GRUB in /dev/sda" when installing GRUB

  - by vicban3d

  I recently bought a shiny new Lenovo Yoga 2 Pro and I want to dual boot it with Ubuntu for studying purposes. Its built-in OS is Windows 8.1 and it has a 256GB SSD. I've made a separate 90GB partition just for Ubuntu and a live USB to install it. The first time everything seemed to work great, I solved the wifi issued by blacklisting ideapad_laptop, the installation went flawlessly and Ubuntu worked fine. When I got up the next morning and turned on my laptop it booted into Windows right away without ever showing the GRUB menu. So I tried to reset, and checked my partitions with the Disk Manager and everything looked fine. Since I couldn't find a solution online I went ahead and formatted the partition to try and install again. This time and every time since, the installation was aborted and I got a fatal error saying: Unable to install GRUB in /dev/sda Executing `grub-install /dev/sda` failed. This is a fatal error. Can anyone please suggest a solution to this problem? If any further information is needed I would be happy to provide it. Thanks. When installing I get the following in details: ubuntu kernel: [ 1946.372741] FAT-fs (sda2): error, fat_get_cluster: invalid cluster chain (i_pos 0). ubuntu grub-installer: error: Running 'grub-install --force failed.

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• install android sdk on kubuntu

  - by dot

  I'm trying to follow the instructions for installing the android sdk found here: http://developer.android.com/sdk/installing/adding-packages.html After i've unpackaged and i run the android program under tools, I don't get all the options that I'm supposed to. The only 2 folders that show up are tools, and extras. Under tools, it only shows the "Android SDK Tools" with the status "Installed". Under the "extas" folder, I have nothing. I've made sure that my http: proxy settings are correct. And I've checked the logs. there are no errors. According to the android developer site, I'm supposed to install the SDK platform tools. has anyone tried this on ubuntu? I also checked and saw others were instructed to do an apt-get install ia32-libs but it failed for me. Besides which, I am running the 32bit os... so I don't think i would need to install that... ?? I've also tried following the instructions found here: http://forums.team-nocturnal.com/showthread.php/772 But... I can't seem to add the personal archive nilarimogard without getting an error message. when i attempt: sudo add-apt-repository ppa:nilarimogard/webupd8 I get the message: Traceback (most recent call last): File "/usr/bin/add-apt-repository", line 125, in ppa_info = get_ppa_info_from_lp(user, ppa_name) File "/usr/lib/python2.7/dist-packages/softwareproperties/ppa.py", line 80, in get_ppa_info_from_lp curl.perform() pycurl.error: (7, "couldn't connect to host") root@jll:/home/me/Documents# any suggestions? Thanks.

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• Why does a redirect from a local IP address assume localhost?

  - by Jeremy

  I am developing a web application on my desktop and it is running on port 80. I am able to access the application from my laptop connected to the LAN by entering my desktop's LAN IP address 192.168.1.8. Now, my application sends a redirect after login, but my laptop assumes the final address is localhost/login. If I manually type in the IP address and URI for any page, it shows that I am logged in, so it works as expected. So, why does the redirect assume localhost? Both of my machines are linux-based. The laptop being Chrome OS. I am running nginx which proxies non-static file requests to jetty on port 8080.

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