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• Concurrent modification during backup: rsync vs dump vs tar vs ?

  - by pehrs

  I have a Linux log server where multiple applications write data. Data is written in bursts, and in a lot of different files. I need to make a backup of this mess, preferably preserving as much coherence between the file versions as possible and avoiding getting truncated files. Total amount of data on the server is about 100Gb. What I really would want (but can't) is to shut-down, backup the system cold and then start it up again. What kind of guarantees against concurrent modification does the various backup tools give? When do they "freeze" the file versions? I am looking at rsync, dump and tar at the moment, but I am open for other (open source) alternatives. Changing the application or blocking writing for backups is sadly not an option. System is not running LVM (yet), but I have considered that for rebuilding the system and then snapshots.

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• How to make sure rsync sets proper file permissions?

  - by BetaRide

  I'm transfering data from a synology box to a debian box with rsync. Unfortunately the permissions of all transfered files are set to rwxrwxrwx on the debian box. I want to make sure this files can be seen by the owning user only. Is there a way to tell the debian box to set the permissions to something like rwx------? The rsync job is set-up through the DSM GUI. If possible I'd rather avoid hacking the synology box and do something on the command line. This means I'm looking for a way to set the permissions on the server side (debian box). I'm using the latest DSM version (4.1).

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• How to define template for org-mode HTML export?

  - by Andrew-Dufresne

  I am using org-mode to generate html pages from my notes. I used Publishing Org-mode files to HTML to setup blog system. I have defined an export template. But to use it I have to add following line in top of my every org file inside my notes project. #+SETUPFILE: ~/.emacs.d/org-templates/level-0.org Is there a way to set this up in .emacs or to customize an org-mode variable so that I do not have to place this line in every file? According to org-mode manual, #+SETUPFILE is an in-buffer setting. Does this mean I cannot define it globally for all org files? These two answers on SU tell how to customize style for HTML export. But my template file contains other settings besides CSS style. So only customizing style won't do it for me.

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• How to Delete File stderr1 on a SAP System?

  - by Techboy

  I have a file called stderr1 in the work directory of several of the SAP servers in my production cluster. It has grown to around 19GB's to fill the hard disk on each server. I have deleted all trace files and WP files from within transaction SM50 but that hasn't deleted it (or re-named it to .old). If I try to rename or delete it manually, it says I can't because the file is in use. Please can you tell me how I can delete or shrink the stderr1 file?

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• Wordpress Automatic Updating/Installing Plugins Permissions

  - by karmic

  I am using the latest Wordpress and I have always had issues with the automatic updater. For the files in the wordpress directory, i set them to permission 770, and add the webserver user 'www-data' as the group owner. I use lighttpd. However, the automatic updating plugins or installing plugins does not work. It works if I chmod 777 the files or if I set the actual owner to the web server as well. What are the best permission settings for security while still allowing the updating feature to work properly in wordress? Also, by 'not work' i mean, it will go to the screen that asks me for FTP credentials when I try to update.

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• Is there a way for Windows 7 to show remaining disk space in the status bar?

  - by Matt Thompson

  This is really driving me nuts. I do a lot of moving media files to and from USB drives, and I am constantly looking to the status bar to see how much remaining space I have on a drive. It's quick, and doesn't involve any clicking. At least, that's what I used to do using Windows XP. Is there a way to get the status bar in Windows 7 to behave in the same way? I saw in a Wikipedia article that some features have been removed from Windows 7, including these two that seem to be affecting me the most: The size of any selected item and free disk space are not shown on the status bar. When no items are selected in a folder, neither the details pane nor the status bar show the total size of files in the folder. Are there any plug-ins or registry tweaks that can be made to return this functionality? If not what is the quickest way to get the remaining space on a drive without having to click on something and leaving the directory you are working in?

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• Remove the windows.old folder after it has already been deleted

  - by muckdog12

  When I upgraded from Windows Vista to Windows 7, I copied all of my files back over from the Windows.old folder. When I was done I deleted the Windows.old folder with the deleted key and then deleted it from my recycle bin. This was about 2 months ago. I recently found out that there was a process to removing that folder. What do I do now? Im sure the files have already been overwritten so is there anything that I should do?

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• Finding how a hacked server was hacked

  - by sixtyfootersdude

  I was just browsing through the site and found this question: My server's been hacked EMERGENCY. Basically the question says: My server has been hacked. What should I do? The best answer is excellent but it raised some questions in my mind. One of the steps suggested is to: Examine the 'attacked' systems to understand how the attacks succeeded in compromising your security. Make every effort to find out where the attacks "came from", so that you understand what problems you have and need to address to make your system safe in the future. I have done no system admin work so I have no idea how I would start doing this. What would be the first step? I know that you could look in the server log files but as an attacker the first thing that I would do would be errasing the log files. How would you "understand" how the attacks succeeded?

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• Windows 8.1 installation: Which drive is the F drive?

  - by sammyg

  I am doing a clean install of Windows 8.1 on an old PC. It was purchased as download from Microsoft Store and written to and booted from a USB flash drive. It went through all of these steps: Copying Windows Files Getting files ready for installation Installing features Installing updates Then at "Getting finished" I am stuck at this stupid dialog box. Please unplug the following external drive and click OK to restart your computer and finish installing Windows. F: How do I tell what physical drive this is? Can I drop to command prompt during installation? And is it safe to unplug it while powered on? There is no external hard drive connected, none that I can see. There is no USB or FireWire drive connected externally. I think it sees one of the internal drives as external... in some weird way?!

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• Filename encoding broken after unzip on windows

  - by flammi88

  I zipped a directory on my linux server. Many files in the directory have german umlauts in their filename. The filesystem is ext3 and the system locale is set to de_DE.utf8. I used the following command to create the zip file: zip -r somezip.zip somefolder/ I transfered this file via WinSCP to my windows laptop and unzipped it. The issue: All filenames with german umlauts are broken. On my linux server the filenames are displayed correctly. I assume that I made a mistake when i created the zip file. Has someone any ideas how i can perserve the right filename encoding when I zip the files with the zip command on linux?

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• How to add command line arguments to command line arguments in Windows shortcut?

  - by Pawin

  I know I can add a command line argument/option to a shortcut this way; for example: "C:\Program Files\Internet Explorer\iexplore.exe" www.a.com So IE will connect to a.com when it starts up. What I would like to do is to get IE connecting to a.com when I call it through another program like the following: C:\Windows\SysWOW64\ForceBindIP.exe 192.168.1.151 "C:\Program Files\Internet Explorer\iexplore.exe" www.a.com This does not work. IE starts up but doesn't go to a.com. It seems like the argument is either ignored or is understood as an argument of ForceBindIP instead (I'm not sure). What I am trying to do is to create 2 IE shortcuts such each of them binds one IE window to one NIC and one particular website. So adding the www.a.com etc in its startup list won't help. OS is Windows 8. Apologize if this has been asked and answered before. Please suggest keywords for searching if that's the case.

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• OpenSSH SFTP server with chroot() + File Permissions

  - by HannesFostie

  I am currently setting up an SFTP server but there is one detail I can't seem to figure out. When I add a user, I would like him to connect using his client and be able to write in his "root dir" right away. My Match case for the SFTP-users group currently has ChrootDirectory set as "/home/%u", and inside that directory I have to have a subdirectory owned by the user, while /home/%u itself is owned by root. Next to that, the "root dir" also has a couple files, .bashrc to name one. Is it possible to put these files somewhere else, remove them, or at least make them invisible to the user? Thanks EDIT: One more little thing I'd like to implement is for one account to have read (or rw, not sure yet) access to all other users' home directories. What is the easiest way to implement this?

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• How to combine wildcards and spaces (quotes) in an Windows command?

  - by Jan Fabry

  I want to remove directories of the following format: C:\Program Files\FogBugz\Plugins\cache\[email protected]_NN NN is a number, so I want to use a wildcard (this is part of a post-build step in Visual Studio). The problem is that I need to combine quotes around the path name (for the space in Program Files) with a wildcard to match the end of the path. I already found out that rd is the remove command that accepts wildcards, but where do I put the quotes? I have tried no ending quote (works for dir), ...example.com*", ...example.com"*, ...example.com_??", ...cache\"[email protected]*, ...cache"\[email protected]*, but none of them work. (How many commands to remove a file/directory are there in Windows anyway? And why do they all differ in capabilities?)

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• Limit maximum incoming connections to a port using iptables

  - by Harley

  I have a server that has apache listening on a number of ports. Some ports are used for configuring the server, and another is used to download large files. My problem is that when I have a large number of clients downloading files, the web interface is uncontactable. I would like to limit the number of clients connecting on the "large file" port so that apache always has available connections to configure the server. A REJECT is fine, the client trying to download the file will back off and retry later. Each client only has one connection open to the server at a time, so limiting by IP won't work. I know I could put something in front of apache to manage this, but I'd really like to do it in iptables, without adding more software.

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• Media Archive System with branches?

  - by Ian McEwen

  In short, how can I get VCS features (revisioning, branching, and deduplication) for a media collection that's far too large for most/all VCS systems? Background I have a 300GB music folder; unfortunately, I only have the hard drive space for this on my desktop system. However, a good portion of my collection is FLAC; therefore, I could theoretically have a space-optimized version in which I transcode all the FLAC to mp3 or some other lossy format, and use only that version on the laptop. However, a portion of my collection isn't FLAC. And that which isn't FLAC shouldn't be transcoded to an equivalent format; it won't have any space savings, which is the point. Moreover, it shouldn't be duplicated: the mp3/ogg portions of the collection should probably be exactly the same files. Thoughts One solution is to have format-specific organization of my music folders, and use some script to transcode the FLAC directory to mp3 or such into another directory. Another is some sort of hack using entirely separate copies and symbolic links for deduplication, or something similar. But these also have a disadvantage of lacking versioning; I'd like to be able to reorganize my music collection, retag things, etc. and save history. This isn't key, but would be awfully nice. I can't see it as entirely unreasonable to set up VCS hooks or something equivalent to keep directory structure synced between two copies, update tags, and transcode FLAC automatically into the space-optimized copy. Basically, the system I really want is a version control system. Two branches: one archival/desktop branch including the FLAC, one space-optimized/laptop branch without it; most VCSes would deal well with whole chunks being the same files well by compressing in a reasonable way (i.e. don't keep two copies of the same data). I could also do a lot of what I talk about above with hooks. But I don't know of any VCS that would deal with a 300GB repository with almost 20k files. Many of them would just not even initialize the whole affair; others would just do it inexpressibly slowly or otherwise badly. checkpoint looks like it's designed for something close (it's at least for media), but wouldn't do deduplication well (and I'm not convinced I'd be able to script it to do things like automatic transcoding and directory-structure syncing). So. Is there anything out there that can do all this, or should I consider it a programming project?

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• Having trouble with EPSON Stylus SX130 scanner

  - by pinouchon

  I am trying to scan files with an EPSON Stylus SX130 on windows 7 x64. When i plug in the printer, windows automatically find drivers for printing, but not for scanning. So i go to the manufacturer website to download the drivers, select windows 7 64-bit and download drivers for EPSON Scan. The install works fine, but when i try to scan a file (eg: from paint or Windows fax and scan), the folowing message pops up and freezes the application : the progress bar plays the animation forever and the application does not respond. I then have no choice to kill the application with the task manager. Do you have an idea of what's going on ? How can i fix the problem, ie: how do i get the scanner actually scan files without freezing ? I tried to install the driver from the CD given in the printer package, and got the same problem. The only help i found so far (the error seems somewhat related) is this : Install a xp virtual machine and run it in there

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• Apache Rewrite Rules breaking each other?

  - by neezer

  I have this rule: RewriteCond %{REQUEST_URI} ^/(manhattan|queens|westchester|new-jersey|bronx|brooklyn)-apartments/.*$ RewriteCond %{REQUEST_URI} !^/guide/(.*)$ RewriteRule ^(.*)$ /home/neezer/public-html/domain.com/guide/$1 [L] Which works great on it's own. Essentially, I have a bunch of directories that have a bunch of files in them that I want to keep in the "/guide" folder, but I want them to appear at the web root for SEO reasons. This rule works, but unfortunately the original URL's still work too (with "/guide"). I want to 301 Redirect the ones with "/guide" in the URL to those without, without actually moving the files on the server. I tried adding this rule: RewriteCond %{REQUEST_URI} ^/guide/(manhattan|queens|westchester|new-jersey|bronx|brooklyn)-apartments/.*$ RewriteRule ^guide/(.*)$ http://www.domain.com/$1 [R=301,L] ... but that breaks my first rule completely. Any thoughts about what I might be doing wrong? Please let me know if you need to know anything else from me to help me with this issue.

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• One-Way Backup Service? [closed]

  - by Jon Rodriguez

  Up until a month ago, my girlfriend has used MobileMe to backup all the files on her MacBook. This turned out terribly when a quirk of MobileMe caused it to erase all of her files on MobileMe, and then sync the newly-erased MobileMe down to her computer, erasing everything. A week's worth of college essays and CS homework were gone. Now, I am terrified of any commercial cloud-backup solutions because of the possibility of this happening. Going off the list provided in these answers, could you please help me find a good backup service that is completely one-way? I want a service where there is literally not a single line of code that has the possibility of writing to my computer's drive. I want a pure one-way backup service.

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• Which Large File System Format to use for USB Flash drive compatible with Ubuntu/Mac/Windows?

  - by wajiw

  I've had this problem for a long time and can't find a solution. I switch between the 3 OSes all the time and use a 1TB USB Drive to do so. I can't seem to find a format that is compatible across all systems that handles large files (at least 8-9 GB). Does anyone have a solution for this? Recently I've tried exFat but that messes up the filesystem when trying to read on windows after adding files from Ubuntu (using the fuse driver). The OSes currently I'm using are Windows Vista/7, Mac OS X (10.6.5) and Ubuntu 10.10

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• How to remove $data stream from file in windows 8

  - by chris.w.mclean

  Windows for a while now has added an additional hidden stream to files that were downloaded from the internet. If you attempted to use these files, you'd get all kinds of odd behavior as windows was detecting this additional stream and then preventing the app / exe from getting all sorts of security clearance. But in previous versions of windows you could right click on a file, go to properties then click 'Unblock' which removed the extra stream. Windows 8 seems to be doing the additional streams trick, but I haven't yet found a way to remove them using the win 8 UI. Anyone know how to do this?

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• Why can't I share my printer on Windows 7?

  - by Edward Tanguay

  I have Windows 7 installed on two computers. I can share folders between them fine. However, I can't seem to share printers between them: when I right-click on the printer I expect to see "share printer" but there is no option for that. When I read about "share printers" in the Windows 7 help, it talks about this computer "not being able to connect to a home network", yet they seem to be connected fine (I can share files between them). Why can't I share printers between the computers if I can share files?

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• media is write protected when using diskshadow.exe, start-bitstransfer powershell cmdlet

  - by Aaron - Solution Evangelist

  i am trying to use the powershell start-bitstransfer cmdlets to transfer a file i have exposed using a vss snapshot (via diskshadow), but unfortunately i am receiving the following error: Start-BitsTransfer : The media is write protected. At line:1 char:49 + Import-CSV c:\hda1\bits.txt | start-bitstransfer <<<< -transfertype upload -Authentication "Basic" -Credential $cred + CategoryInfo : InvalidOperation: (:) [Start-BitsTransfer], Exception + FullyQualifiedErrorId : StartBitsTransferCOMException,Microsoft.BackgroundIntelligentTransfer.Management.NewBits TransferCommand we really want to utilize the bits endpoint we are attempting to transfer the files to. is there any other way we can go about this (aside from copying the files elsewhere first, unless we can copy one slice at a time and transfer that)?

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• Ad Agency storage/file server +backup needed (NAS or something else?)

  - by Rob

  Looking for a "this is all you need" recommendation. We're a small ad agency with both mac & pcs that access and share files from a 3 yr old Windows 2000 box (no server software). We currently have 1TB on the "server" and back it up to 2 different Seagate Free Agent Pro 1TB external drives. But we're low on space and are looking for something that's bigger, that we can still access from Mac & PC, EASY backup system, secure from viruses, firewall enabled. Not sure if a NAS will work or if we should have a real server. We don't really get on that box except to restore files, or run Norton on it. I hope I've provided enough for a general recommendation. Thanks. Rob Phx

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• nfs server on cygwin slow

  - by Weltenwanderer

  The setup: We run an instance of cygwin nfsd on a Windows 2008 Server (Xeon 3,2 GHz). There are several Sun Solaris and SunOS machines accessing the shares. This is the exports file: /disk3 (rw,all_squash) /disk2 (rw,all_squash) Those paths are soft linked to the relevant cygdrive/d/path/to/dir paths. Some of the folders contain up to 10k files. The Problem: ls -la on the mounted folder on the sun boxes takes 2 - 3 minutes and the general read performance is really bad. cat filename displays the file in slow bursts and this hurts performance on tasks that access those shared files heavily. Processor load is not the issue, the nfs server idles most of the time, the cygwin tasks never get over 1% load.

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• Backing up data in an encrypted way

  - by Eli Bendersky

  I have the following use case: There's some data from my PC I want to periodically back-up online I own some hosting, so I want to use that for the backups, don't want to pay to another backup service I want to encrypt my data locally prior to moving it to the server I have no problem writing scripts to automate the process (say, periodically generate the backup and upload by FTP to my server), but my main question is about step 3 - the encryption: which way is recommended to encrypt my files (say, collected into a .ZIP) prior to uploading to the server? P.S. TrueCrypt seems popular but it's not quite what I'm looking for, since I don't want the files to be constantly encrypted here on my PC.

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