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• Beaglebone Black running Debian, does device tree overlay act as an api?

  - by user3953989

  This maybe more of a Linux specific question but... I've been reading many tutorials and it seems that you can use JavaScript, Python, and C++ to write code for the Beaglebone Black(BBB). It looks like the way C++ interfaces with the BBB hardware is via reading/writing text files on the OS while Python has it's own library. All the C++ examples out there control the GPIO and PWM via reading/writing to text files. Is this the only way to access the hardware or just how Linux does drivers?

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• How do I make stunnel verify a clients certificate?

  - by unixman83

  NOTE: The title is misleading. Please correct it if you know a better title. What I want to know is how do I create the SSL keys / certificates needed for this. Hi. I am using stunnel to authenticate RDP (Remote Desktop) and I need to verify that a client possesses the proper credentials. So people cannot brute force into the machine. I am also using a bad (outdated) version of RDP that has security vulnerabilities, so stunnel is a must. I will preshare the necessary .pem's between machines. What are the openssl commands I need to create the right .pem files on both the client and on the server? What files need to be shared?

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• Is there a way to create a copy-on-write copy of a directory?

  - by BCS

  I'm thinking of a situation where I would have something that creates a copy of a directory, tweaks a few files, and then does some processing on the result. This wold be done fairly often, maybe a few dozen times a day. (The exact use case is testing patch submissions; dupe the code, patch it, build/test/report/etc.) What I'm looking for could be done by creating a new directory structure and populating it with hard links from the origonal. However this only works if all the tools you use delete and recreate files rather than edit them in place. Is there a way to have the file system do copy-on-write for a file? Note: I'm aware that many FSs use COW at a block level (all updates are done via writes to new blocks) but this is not what I want.

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• Multi-site Drupal install with sites on different ports using Apache ip-based hosting?

  - by MattB

  In the past we've used name-based virtual hosting in Apache. We recently converted websites to SSL and had to go the ip-based route. As a result, we currently have an instance that is set up as follows: www.domain.com using port 80 dev.domain.com using port 8080 Both use the same IP. Is this scenario possible using Drupal multi-site functionality? While we find that dev.domain.com works and reads the correct "dev" database (using the dev settings), it reads theme files from the "www" site instead which is not what we want. Is the culprit the dev's htaccess file? Apache is listening on 8080 and does use the proper DB settings, but just not the correct theme files. One other note: browsing dev.domain.com:8080 gives an error: "The page isn't redirecting properly". Should we just purchase a new IP address for the dev website, or would this still not help? Any advice would be appreciated. Thanks.

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• How to open a EAR/WAR file in windows 7

  - by Calm Storm

  I have a few EAR/WAR files which are Java archives and I would like Windows 7 to open these files the way it opens a file with extension zip. So I open this war file and in the list of softwares available with "Open" I see MS Word, Notepad etc but nothing about CompressedFolderView. I also tried manually specifying the location of exe (I thought this was expand.exe) but that does not work. Does someone know if I can make this work? Or should I use Winzip or some such utilities?

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• Increase Volume of an MKV Video from Linux Terminal

  - by The How-To Geek

  I've got a large amount of .MKV video files which seem to all play at a very low volume - I end up having to turn the TV up all the way to hear them, which is really irritating when I switch to another channel and wake the dead because it's so loud. What I'm looking for is a command-line method to increase the volume (so I can run it on all of them quickly) that would hopefully work regardless of the audio codec in use in the particular file. (I don't mind hard-coding the output audio though). For reference, I'm using Ubuntu 9.04 on my server, and the files are being played back with Boxee on a Mac Mini, but the volume problem is the same on Windows too.

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• about Linux read/write only permissions

  - by Bimal

  My question looks similar to another thread: Linux directory permissions read write but not delete Here, I want to create a directory where I can give the permissions like: A user can create/upload any files. A user can re-upload and overwrite the files. A user cannot remove the file anymore. I am on CentOS 5.5, basic user only. How can I do that? Or is there any third party software that can be installed to do this? Or, create a new process which will lock the permissions right after a new file is uploaded via ssh?

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• How to arrange 2 SSD with 2 SATA?

  - by alfish

  I like to have best io performance as well as good capaciyy and reliability out of a server that hosts a busy forum, which involves loads of static files download. I am wondering what is the best plan to format and use the disks given that the server has only 4 disk bays and I have 2 SSD and 2 SATA disks at hand. I am currently thinking about putting the disks in RAID 10 so that SSD contains /var/lib/mysql as well as most of the OS (Likely to be Debian) and SATA disk to contain /path/to/static/files. However I'd like to hear your expert opinion on this. Thanks

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• Windows 8 on iSCSI with LIO target: thin provisioning

  - by LubosD

  I have installed Windows 8.1 on an iSCSI target. This target is provided by Linux LIO and is backed by a sparse file. One of the reasons I created such an installation was thin provisioning. In other words, when I free disk space on Windows, LIO should punch holes into the file, thus free storage space on the Linux server as well. I have checked my kernel's sources and the SCSI UNMAP command is really supported for file-backed targets. On the other hand, deleting files on Windows doesn't lower the amount of space taken by the backing file on Linux (checked with du). Actually, the backing file sometimes grows even more. Some sources on Google say Win8 should support UNMAP/DISCARD on iSCSI, but even in Wireshark I only see ordinary read and write commands when files are being deleted. Any way to fix or troubleshoot it?

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• Trying to mount an NFS directory from a Mac with another user

  - by Yair

  I have a username on an ubuntu server, lets call it user a. I want to mount a directory from that server to my Mac, on which I have another username, lets call it user b. My problem is that, after I mount the directory (using the disk utility app) I can view files on the server but can't modify or create new files on it. I checked, and if I change the permissions of the server directory so that its open to everyone (chmod 777), I can write to it. So what I need to know, is how can I specify the username and password in the NFS client when setting up the mount? That is, I want to specify that I'm trying to log in as user a to the server.

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• creating a subdomain on windows server

  - by jason

  Hi I'm trying to set up a sub domain for development on a windows server and am having problems setting the correct details in the httpd.ini file and hoped soemone could help. I have set up the subdomain http:// dev. website .com The files that I want to use for this subdomain are on the server in a folder called development http:// www. website .com /development in the directory structure they are in /htdocs/development What do I need to add the the httpd.ini file to point the http:// dev .website .com to file files located in the /htdocs/development folder on the server? Many Thanks

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• Regex working in RedHat is not giving any result in Ubuntu

  - by Supratik

  My goal is to match specific files from specific sub directories. I have the following folder structure `-- data |-- a |-- a.txt |-- b |-- b.txt |-- c |-- c.txt |-- d |-- d.txt |-- e |-- e.txt |-- org-1 | |-- a.org | |-- b.org | |-- org.txt | |-- user-0 | | |-- a.txt | | |-- b.txt I am trying to list the files only inside the data directory. I am able to get the correct result using the following command in RHEL find ./testdir/ -iwholename "*/data/[!/].txt" a.txt b.txt c.txt d.txt e.txt If I run the same command in Ubuntu it is not working. Can anyone please tell me why it is not working in Ubuntu ?

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• Increase Volume of an MKV Video from Linux Terminal

  - by The How-To Geek

  I've got a large amount of .MKV video files which seem to all play at a very low volume - I end up having to turn the TV up all the way to hear them, which is really irritating when I switch to another channel and wake the dead because it's so loud. What I'm looking for is a command-line method to increase the volume (so I can run it on all of them quickly) that would hopefully work regardless of the audio codec in use in the particular file. (I don't mind hard-coding the output audio though). For reference, I'm using Ubuntu 9.04 on my server, and the files are being played back with Boxee on a Mac Mini, but the volume problem is the same on Windows too.

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• Finding documentation for /etc/**/*.dpkg-*

  - by intuited

  During upgrades, files with these extensions appear in /etc and its subdirectories. I gather that *.dpkg-dist contains the file that was distributed with the currently-installed version of a package, and *.dpkg-new contains the version from the version being installed, however I'd like to see the docs to be sure that I'm getting it right. Also there are occasionally other similarly named files, eg *.dpkg-original, and I'd like to be able to read up on these. I've checked /usr/share/doc/dpkg for documentation on this, and come up empty; there's no dpkg-doc package; Google doesn't have anything except unanswered questions. Can someone point me to the documentation for this aspect of debian package management?

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• Software Suggestion for Managing Voice Recordings (Windows)

  - by Cbeppe

  I'm looking for Windows software that allows me to effectlively manage already made voice recordings. I have a series of recordings taken from an iPhone and I have extracted the files. The problem is that these are very long recordings and therefore I'm looking for software that allows me to: Bookmark a time in the recording Effectively manage multiple files (like Adobe Bridge does with images) Freeware or Payware Possibly other features, I haven't done this before and I'm sorry I'm unable to give a more professional description. Thanks in advance to everyone who can help! If you have any other questions, please don't hesitate to ask - I will try my best to provide useful answers.

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• Recommend a web file sharing software please

  - by Baczek

  I'm looking for a web platform to put company files at. My requirements are: should be accessible via a browser should be open source must be installable (dropbox is a no-go) must have an option to put a access time limit on a file must perform garbage collection automatically after a file expires must be able to mark files as public or private an option to protect a file via a pin-code for users without accounts in the system would be nice to have The problem is I don't even know what to search for - all my googling results in either complete groupware solutions or p2p file sharing software. If such a thing doesn't exist, please don't hestitate to say so, so I can crawl to a corner and cry myself to sleep. TIA

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• How to calculate proper amount of inode/block sizes for a linux filesystem.

  - by Donatello

  I have an old reiser filesystem which I'm going to convert to Ext3. The problem I have is to determine the proper block- and inode-sizes for this partition. The partition is 44 GB large and has to hold 3,000,000+ files of sizes between 1 kb and 10kb, how can I figure out the best ratio of inodes and blocksize? The below is something I tried which seems OK but makes the copying files incredibly slow. mkfs.ext3 -t ext3 -c -c -b 1024 -i 4096 -I 128 -v -j -O sparse_super,filetype,has_journal /dev/sdb1 Thanks.

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• XP Clients can't copy to networkshare

  - by chewbacca76

  i have a windows 2003 domain where i have strange problem. One of our file shares is on a 2003r2 domain controller, xp clients trying to copy files on the share are always getting the error error copying file or folder filename could not be copied. path too long while windows 7 clients work fine. Nothing unusal is found in the eventlog on both the server and the client. It doesn't matter if i access the share by fqdn or ip, the path is including filename shorter than 20 characters i.e. \path\share\file.txt Copying files to other servers is fine. Reading from the shares is ok too. Happened from one day to the other, one windows update that was installed this day (kb2736233) was removed but nothing changed. thanks for any tips

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• Moving a File While It's In Use -- How Does it work?

  - by Zaz

  I've noticed that on non-windows OS.... ie linux/mac i can do things like: - Send a zip to a friend over aim - Delete the file while it's in transfer And the transfer does not fail. Or, I can do operations like.. - start a movie - erase the file - the movie still plays to completion (read from disk, not just buffered in memory) Although the files are being "deleted", as i mentioned, they are actually being moved to a different location on the file system... ie a Trash directory or something. So it seems to me like the OS uses a pointer @ the file that is updated when it moves rather than accessing the files directly. Can anyone shed some light on how this AWESOME capability is actually implemented? I'm not even sure what to google to learn more about it. thank you.

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• Automate hashing for each file in a folder?

  - by Kennie R.

  I have quite a few FTP folders, and I add a few each month and prefer to leave some sort of method of verifying their integrity, for example the files MD5SUMS, SHA256SUMS, ... which I could create using a script. Take for example: find ./ -type f -exec md5sum $1 {} \; This works fine, but when I run it each time for each shaxxx sum afterwards, it creates a sum of the MD5SUMs file which is really not wanted. Is there a simpler way, or script, or common way of hashing all the files in to their sums file without causing problems like that? I could really use a better option.

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• Window 7 hangs on using Adobe Reader

  - by SahilMahajanMj

  Window 7 often hangs when i open some pdf file with Adobe Reader. First of all, Adobe Reader crashes and as soon as it stops, the window hangs and after few seconds, it displays a message quoting "Dumping Physical Memory" in a typical Windows98 manner and then the system reboots. This problem persists each time i use Adobe Reader. However, i have installed Foxit Reader to view Pdf files. But there are some issues with that also. As sometimes i have editable files, which could be done in Adobe Reader's newest version only. Suggestions on how to solve this problem would be appreciated.

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• How do you know which domain owns the hosting?

  - by BubbleStalker

  For example if I have 1) host adress 2) login 3) password, I am entering by SSH on ruby on rails hosting, then how can i be sured that this hosting belongs to a specific domain? for example how can I know if www.site.com - belongs to some specific hosting to which I have access. I am asking this because I have access to hosting of ruby on rails, and when i modify files, there is no changes, i've tried to use the files "script", "serv", "restart.txt" - by ssh: touch tmp/restart.txt ./serv restart script restart nothing of the above helped...and I don't know what to do, any ideas?

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• Lenovo Windows 8 EFI restore from image

  - by anderhil

  First time here. I have bought e530 with windows 8 and the first hour of work with it i have a problem. I have ssd with windows 7 which i want to use with my new e530. I have made a sysprep of win 7 and installed ssd to the e530. The HDD which was inside e530 i want to use as second hdd instead of my DVD Drive. I connected this HDD through usb-to-sata adapter to copy some files from ssd to the hdd. Unfortunately it didn't see the file system on the HDD (but first time i have booted to it and first boot into Windows 8) I've made some mistakes and i corrupt the filesystem on the hdd. I tried bunch of tricks to recover the GPT, but it didn't work. I have managed to recover the Lenovo_Recovery partition to my ssd using recovery tools. And now I'm stuck, with this new things to me - EFI, GPT, etc i don't how this stuff works, and i have been trying to understand this for hours - but nothing seems to work. I want to restore the Windows 8 to the hdd, so it is there alive. What i have done so far: Formated the HDD I took the PBRALL file from the Lenovo_Recovery " convert gpt create partition Primary size=1000 ID=DE94BBA4-06D1-4D40-A16A-BFD50179D6AC gpt attributes=0x8000000000000001 assign letter=W format quick LABEL=WINRE_DRV create partition efi size=260 assign letter=s format quick fs=fat32 LABEL=SYSTEM_DRV create par msr size=128 create partition primary noerr assign letter=t format quick LABEL=Windows8_OS shrink desired=12197 create partition Primary ID=DE94BBA4-06D1-4D40-A16A-BFD50179D6AC gpt attributes=0x8000000000000001 assign letter=q format quick LABEL=Lenovo_Recovery " it recreated the partitions copied contents of SDRIVE.zip to SYSTEM_DRV partition copied contents of WDRIVE.zip to WINRE_DRV partition Copied restored Lenovo_Recovery back to Lenovo_Recovery partition So now I have 3 system partitions: SYSTE_DRV BOOT boot.sdi EFI BOOT bootx64.efi LenovoBT.efi Lenovo ... Microsoft ... WINRE_DRV\Recovery\WindowsRE\winre.wim Lenovo_Recovery (whic contains install.wim and bunch of other things) So i put back the HDD inside the laptop and tried to boot - but nothing works. It just doesn't boot to anything - no errors - nothing at all. When I choose this HDD manually for boot - just black screen blinks and that's all - it returns back to the devices boot menu. SYSTEM_DRV is EFI partition, so I don't understand why it doesn't boot, it has files needed inside. Can anybody tell me what should be done to make it boot to recovery console or smth like that? How to restore the Windows 8 from the Lenovo_Recovery install.wim image? As I understand I have all the files where they should be, but why it doesn't work? How to troubleshoot such things? Also, if somebody has good link where EFI booting process is explained in details that would be great. Cause i still don't understand how it knows what partition to boot?

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• Send nginx X-Accel-Redirect request from remote server

  - by phingage

  I have 2 server first (domain.com) is a django/apache server, second (f1.domain.com) is a file server (nginx) where some files are protected and should be allow download only to registred user, so i have setup a nginx server with a server { listen 80 default_server; server_name *.domanin.com; access_log /home/domanin/logs/access.log; location /files/ { internal; root /home/domanin; } } and from django I send a request via X-Accel-Redirect header, but dosen't work i think because come from a remote server, how can i accomplish my task? regards!

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• Best way to administer a website remotely

  - by Mark Szymanski

  I have a Windows computer running an intranet website with IIS and I was wondering what the best way was to administer it from another computer, in this case, a Mac. What I want to do: Be able to edit pages from my Mac. VNC into the server because it is 'headless'. (Already have this set up) My current file syncing setup: I have Dropbox setup to sync files between the computers and then use PureSync to sync the files in the Dropbox folder into the wwwroot folder. Is there a better (faster/easier) way I could do all this? Thanks in advance!

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