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• Groups and Symlinks, is this safe?

  - by sjohns

  Hi, Im trying to serve similar content over two websites, but don't want to have 2 of each file, especially when they are growing. The basics, im running CentOS, with cPanel. Is it safe to do the following, I have folder downloads1 in /home/user1/www/downloads1/ i have user2, can i make a group - groupadd sharedfiles add both users to the group: useradd -g sharedfiles user1 useradd -g sharedfiles user2 then chown -r -v user1:sharedfiles downloads1/ User 2 i want to have /home/user2/www/downloads1 but i want it to be a symlink like ln "downloads1" "/home/user1/www/downloads1/" lrwxrwxrwx 1 user2 sharedfiles 11 May 9 14:20 downloads1 -> /home/user1/www/downloads1/ Is this a safe practice? Or is there a better way to do this if I want them both to be able to share the files for distribution over apache. Is there any drawbacks to this? Thanks in advance for any light shed on this. I'm not 100% sure weather this should have gone here or on serverfault.

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• vim does not preserve symlink over sshfs

  - by HighCommander4

  I'm having some trouble with symlinks and sshfs. I use the '-o follow_symlinks' option to follow symlinks on the server side, but whenever I edit a symlinked file on the client side with vim, a copy of it is made on the server side, i.e. it's no longer a symlink. Set up a symlink on the server side: me@machine1:~$ echo foo > test.txt me@machine1:~$ mkdir test me@machine1:~$ cd test me@machine1:~/test$ ln -s ../test.txt test.txt me@machine1:~/test$ ls -al test.txt lrwxrwxrwx 1 me me 11 Jan 5 21:13 test.txt -> ../test.txt me@machine1:~/test$ cat test.txt foo me@machine1:~/test$ cat ../test.txt foo So far so good. Now: me@machine2:~$ mkdir test me@machine2:~$ sshfs me@machine1:test test -o follow_symlinks me@machine2:~$ cd test me@machine2:~/test$ vim test.txt [in vim, add a new line "bar" to the file] me@machine2:~/test$ cat test.txt foo bar Now observe what this does to the file on the server side: me@machine1:~/test$ ls -al test.txt -rw-r--r-- 1 me me 19 Jan 5 21:24 test.txt me@machine1:~/test$ cat test.txt foo bar me@machine1:~/test$ cat ../test.txt foo As you can see, it made a copy and only edited the copy. How can I get it to work so it actually follows the symlink when editing the file?

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• How do I move a linked file on Unix?

  - by r3mbol

  I have a bunch of files in one directory and links to each one of those files in another directory. So ls -l looks something like this: lrwxrwxrwx 1 rembol rembol 89 Jan 25 10:00 copyright.txt -> /home/rembol/solr/target/deploy/data/core/copyright.txt lrwxrwxrwx 1 rembol rembol 92 Jan 25 10:00 jar-versions.xml -> /home/rembol/solr/target/deploy/data/core/jar-versions.xml lrwxrwxrwx 1 rembol rembol 85 Jan 25 10:00 lgpl.html -> /home/rembol/solr/target/deploy/data/core/lgpl.html lrwxrwxrwx 1 rembol rembol 79 Jan 25 10:00 lib -> /home/rembol/solr/target/deploy/data/core/lib lrwxrwxrwx 1 rembol rembol 87 Jan 25 10:00 readme.html -> /home/rembol/solr/target/deploy/data/core/readme.html drwxr-xr-x 3 rembol rembol 4096 Jan 25 10:00 server drwxr-xr-x 2 rembol rembol 4096 Jan 25 10:00 startup Now I want to move those linked files from /home/rembol/solr/target/deploy to /home/rembol/output/. If I do that my simply calling mv, links will break. I don't want to re-link each file separately, cause there are hundreds of them (they are generated automatically). Is there some clever way to move linked files, rather than writing a script that unlinks, moves and relinks recursively for each file in each subdirectory?

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• Automatically cycle numerous or large files to the trash

  - by minameismud

  I've been tasked with fixing a vendor's program that, under certain conditions, dumps gigs of junk files into a log directory. It ends up filling users' machines. My task is to figure out how to make it stop without any source code or additional running processes, and without making the program kasplode. In other words, I'm looking to use a feature of the file system to control the growth. One idea I had was to make a hard link from that folder to NUL, as you might with /dev/null in the linux world. However, my attempts to use the mklink program to create a junction result in a message that says Local volumes are required to complete the operation. Any ideas on how to complete the junction, or other ideas to solve the problem?

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• Linux disk usage analyser that acts like symlinks are real files

  - by Rory

  I am using git-annex, an extension to the DVCS git, which is designed for handling large files. It makes heavy use of symlinks. The actual large files are moved to the .git/annex directory and the original files are symlinked to there. I am running out of disk space, and need to clear up, and see what's using all my space. Usually I'd use a disk usage tool like ncdu, Baobab or Filelight. However they treat the symlink as essentially empty, and only count the file that it is pointing to as using any space. Which means when I use git-annex, it shows no space used in the main directories and lots of space used in the .git/annex directory. This is not helpful. Is there any (graphical or ncurses) based disk usage programme for linux (apt-get installable would be easie that is capable (through options or not) of counting a symlink as using up the space that the original file uses up? Many have options for different behaviour for hard links, so makes sense that some should h (I know counting symlinks as using space has flaws, like counting the space space twice, broken symlinks, etc. But that's OK for my purposes)

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• Tar dereference only 1 level

  - by Bart van Heukelom

  I use the following pseudo-script to create a TAR of my installed software mkdir tmp ln -s /path/to/app1/bin tmp/app1 ln -s /and/path/going/to/the-app-2 tmp/app2 tar -c --dereference -f apps.tar tmp I need the --dereference option here to follow the links I just made in tmp. The reason I make the links in the first place is to store the directories with a different name in the archive than they have on the filesystem. Until now it has worked fine. However, I now have the situation that /path/to/app1 also contains links, and those I don't want to follow. Is this possible with some changes to the tar command? Or do I need to completely switch around the way I build the archive?

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• Linux: Can I link multiple destinations via softlinks?

  - by kds1398

  Attempting to end up with something similar to this: $ ls -l lrwxrwxrwx 1 user group 4 Jun 28 2010 foo -> /home/bar lrwxrwxrwx 1 user group 4 Jun 29 2010 foo -> /etc/bar The intention is to be able to move a file to foo & have it go to both destination directories for now. The goal is to eventually unlink /home/bar link after confirming there are no issues with moving the files to /etc/bar. I am restricted in that I am unable to change or add to the process that moves the files.

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• git, egit, submodules, and symlinks -- how should shared sub-projects be handled in eclipse?

  - by Autophil

  Here's the situation. I have a few git projects with a directory structure layed out more or less like this: simpleproj app www admin demo lib model orm view model user blah ... storeproj app www about mobile fbapp lib model orm view model user message cart product merchant Each directory in "lib" contains a separate project, either created in-house or forked, all of which use git for source control. So I figured I should make them submodules of my projects, right? Well, we've been moving toward eclipse + egit, because some of our windows guys not used to a CLI need something they can use without being scared of screwing things up. Anyway, the problem is, egit doesn't support submodules. So, my solution has been a rather crude one involving symlinks... lets say my directory structure on my dev box is generally layed out like this: ~/projects/ bigproj .git app lib model (- ~/lib/model/src/) orm (- ~/lib/orm/src/) neatproj .git app lib view (- ~/lib/view/src/) oldproj .git app lib orm (- ~/lib/orm/src/) ~/lib/ model .git src README.md orm .git src COPYING view .git src ...the symlinks link inside of directory with the git repo, so eclipse doesn't get confused, and everything sort of works. On my machine, I can update the libs from anywhere and all projects will be updated (needing to be committed again of course). Each project stores a separate copy of the contents of the symlinked directories within "lib" -- but only when staged from within eclipse. After committing from eclipse and moving back to the CLI, git sees that a bunch of files have been removed and a few symlinks have been created. Of course this is acceptable also, probably more so than keeping a separate history of the libs for each project... but eclipse and CLI git obviously need to be on the same page so tons of files aren't vanishing and reappearing. So this brings me to my question. I'd like to know how to either: get eclipse+egit to see the symlinks as symlinks if git will somehow handle them properly*, or get the CLI git to treat them as non-symlinks. Or, if there's a better way to do this, I'm all ears. Hope this all made sense! :D Note: tried to tag this as git-submodules, but was not allowed :( * should I make them relative or absolute? Either way it's a mess. Also will symlinks will work on windows? i know there's something similar but you need a 3rd party tool to manage them AFAIK, i doubt these would translate well.

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• Could not load file or assembly error even when reference has been removed

  - by twal

  Could not load file or assembly 'Payflow_dotNET_2.0' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) I tried to reference the payflow SDK and got this error.But I am no longer trying to reference it. I have removed all references to this dll. and Now I am just trying to get the project to start in VS but I still get this error. I am not trying to add the dll anymore.If i have removed the reference to this, why am I still getting this error? How can I remove anything else that may still be causing my program to look for this file? Thanks!

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• how to add a reference to assembly

  - by Gold

  hi i try to run pdf to text C# code, i have reference to 2 dll and i get this error when i try to run the program: how to add a reference to assembly ? the type 'java.io.File' is defined in an assembly that is not referenced. You must add a reference to assembly 'IKVM.GNU.Classpath, Version=0.20.0.0, Culture=neutral, PublicKeyToken=13235d27fcbfff58'. thank's in advance

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• Apache configuration FollowSymlinks- Apply to php scripts?

  - by Josh

  I have Options set to none for my webroot directory. I also have a symmlink /var/coderoot - /var/webroot/coderoot In the php script I can do include("/var/coderoot/file"); and it works fine. Regardless of the option (yes I save and restart apache.) Does follow symlinks only apply to symlinks used in a certain way? Is there a performance loss using the include with a symmlink?

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• IIS7 doesn't monitor changes across symlinks

  - by Matt Hensley

  I've used the mklink utility to create a symlink to a directory of web content. IIS7 doesn't "see" changes any classic ASP files in this linked directory without issuing an iisreset. I've disabled caching and file changes are picked up on other static files (such as .html) but .asp files are ignored.

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• Restoring web reference in Visual Studio 2008

  - by Mark Cheeseborough

  I had a web reference set in my VS2008 ASP.NET project, but due to some source control weirdness it is no longer listed in the project. I have the set of files in the Web References folder under my project. There's a .wsdl, .disco and several .datasource files. Is there any way to re-add this web reference through the existing files rather than using the "Add Web Reference" dialog?

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• Starting programs from terminal then exiting terminal exits started programs?

  - by sherrellbc

  I really was unsure how to phrase the question title. What I mean is that when I use the terminal to start a program, most of the time when the terminal is closed it also exits the programs started from it. Now this makes sense if we look at it from a hierarchical standpoint of the terminal being the parent process which spawns child processes, and any halt of the parent causes subsequent halting of the children as well. However, I've noticed this to not always be the case. For example, I downloaded Sublime Text Editor and created a symlink in PATH. I can start this program by issuing a sublime command from the terminal, but subsequent closure of the terminal program does nothing to sublime. However, other times either the child process that was started it also closed or it hangs up and causes problems. tl;dr: Is it always the case that programs started from a closed parent process will be closed when the parent is exited? And if so, is there way to start a program from the terminal and then close the terminal without exiting the started process? The whole point here is to start programs from the terminal so I do not overly-populate my desktop with symlinks.

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• Why is the 'this' keyword not a reference type in C++ [closed]

  - by Dave Tapley

  Possible Duplicates: Why ‘this’ is a pointer and not a reference? SAFE Pointer to a pointer (well reference to a reference) in C# The this keyword in C++ gets a pointer to the object I currently am. My question is why is the type of this a pointer type and not a reference type. Are there any conditions under which the this keyword would be NULL? My immediate thought would be in a static function, but Visual C++ at least is smart enough to spot this and report static member functions do not have 'this' pointers. Is this in the standard?

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• How do I find broken symlinks automatically on Windows?

  - by HughG

  Not sure if this is bad style, but I'm asking this question here because I couldn't find the answer elsewhere, and then I worked out one solution on my own. I'd be interested to see other people's solutions, but after a few days I'll post my own. In my specific case, I'm running on Windows 7, but I'd be interested in answers for other/older versions of Windows. I realise that one answer is "install a version of Unix find, and then solve as for Unix", but I wanted a more "native" solution. EDIT 2012-07-17: Clarification: by "automatically" I ideally mean something I can run as part of a script, rather than a GUI tool which does all the work at the press of a button, because I'll want to do this unattended.

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• create symlink to another machine

  - by microchasm

  Hi, I have 2 machines. Both running CentOS. Box1 is webserver with apache, php. Box2 is mysql, and file storage. The files will only be accessible from Box1 within the webapp. I'd like to somehow create a symlink or somesuch on box1 to a folder on box2 where uploaded files can be stored and retrieved. Security in mind, what would be the best way to go about linking these 2 boxes up in a transparent (to apache) way? NB: the boxes are connected directly to each other via a crossover cable; no lan access to box2. Much thanks!

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• How do C++ compilers actually pass reference parameters?

  - by T.E.D.

  This question came about as a result of some mixed-langauge programming. I had a Fortran routine I wanted to call from C++ code. Fortran passes all its parameters by reference (unless you tell it otherwise). So I thought I'd be clever (bad start right there) in my C++ code and define the Fortran routine something like this: extern "C" void FORTRAN_ROUTINE (unsigned & flag); This code worked for a while but (of course right when I needed to leave) suddenly started blowing up on a return call. Clear indication of a munged call stack. Another engineer came behind me and fixed the problem, declaring that the routine had to be deinfed in C++ as extern "C" void FORTRAN_ROUTINE (unsigned * flag); I'd accept that except for two things. One is that it seems rather counter-intuitive for the compiler to not pass reference parameters by reference, and I can find no documentation anywhere that says that. The other is that he changed a whole raft of other code in there at the same time, so it theoretically could have been another change that fixed whatever the issue was. So the question is, how does C++ actually pass reference parameters? Is it perhaps free to do copy-in, copy-out for small values or something? In other words, are reference parameters utterly useless in mixed-language programming? I'd like to know so I don't make this same code-killing mistake ever again.

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• Reference manager for Ubuntu

  - by user36511

  I'm in dire need of a reference/citation manager in Ubuntu. The features I need the most are: 1) Metadata extraction/editing of pdf 2) Fetch metadata from online databases such as Google Scholar 3) Attach pdf or other file to reference 4) Tag references and recall those with a given tag or set of tags 5) Provide APA style citation for references (in integration with OOffice and/or Latex) Optional: Would be great if it can annotate/highlight pdfs. Mendeley probably does all of these, but it's behavior has driven me insane, especially when the number of references it's trying to handle is large. It constantly tries to sync with the web and creates duplicate references. I've tried JabRef, and while it looks like a decent piece of freeware, it doesn't do some of the above. I found others like Bibus, Referencer, etc. to be lacking or buggy or inactive development. Is there another option, or should I give up the search.

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• When is it okay to reference WindowsBase.dll?

  - by Tyler

  I've heard/read about people not wanting to reference the assembly because of the Windows component (e.g. "I don't want to reference Windows for my Web App). I'd like to hear what a large community feels about this. For which project types (business, data access, etc.) is it considered acceptable to reference WindowsBase.dll.

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• How to know the level of a symlink in linux?

  - by ???

  For example, if a symlink a -> b b -> c c -> d say, the symlink level of a is 3. Then, is there any utility to get this info? And, also I want to get the expansion detail of a symlink, which will show me something like: 1. /abc/xyz is expanded to /abc/xy/z (lrwx--x--x root root) 2. /abc/xy/z is expanded to /abc/xy-1.3.2/z (lrwx--x--x root root) 3. /abc/xy-1.3.2/z is expanded to /abc/xy-1.3.2/z-4.6 (lrwx--x--x root root) 4. /abc/xy-1.3.2/z-4.6 is expanded to /storage/121/43/z_4_6 (lrwx--x--x root root) 5. /storage/121/43/z_4_6 is expanded to /media/kitty_3135/43/z_4_6 (lrwx--x--x root root) So I can diagnostic with the symlinks. Any idea?

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• Symlink path can be followed manually, but `cd` returns Permission denied

  - by Ricket

  I am trying to access the directory /usr/software/test/agnostic. There are several symlinks involved in this path. As you can see by the below transcript, I am unable to cd directly to the path, but I can check each step of the way and cd to the symlinked directories until I reach the destination. Why is this? (and how do I fix it?) Ubuntu 12.10, bash > ls /usr/software/test/agnostic ls: cannot access /usr/software/test/agnostic: Permission denied > cd /usr/software/test > cd agnostic bash: cd: agnostic: Permission denied > pwd -P /x/eng/localtest/arch/x86_64-redhat-rhel5 > ls -al | grep agnostic lrwxrwxrwx 1 root root 15 Oct 23 2007 agnostic -> noarch/agnostic > ls -al | grep noarch ... lrwxrwxrwx 1 root root 23 Oct 23 2007 noarch -> /x/eng/localtest/noarch > cd noarch > cd agnostic bash: cd: agnostic: Permission denied > ls -al | grep agnostic lrwxrwxrwx 1 5808 dip 4 Oct 5 2010 agnostic -> main > cd main > ls (correct output of `ls`) > pwd /usr/software/test/noarch/main > pwd -P /x/eng/localtest/noarch/main

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• Windows 7 / Symlinks - How do I copy a Symlink to a directory?

  - by John2496

  Is it possible to copy a Symlink to a directory in Windows 7. When I try to copy a symlink'd directory, it tries to deep copy the contents to the location.

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• WinXP - Map network location to local folder

  - by Bill

  I have a network location, \\myserver\myshare. On my Windows XP box, I wish to map this location to the path c:\somefolder. Am I asking the impossible?

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• Web shortcuts (.url) not working on Windows 7

  - by jpbochi

  I'm experiencing several symptoms, but I believe they are all related to web link files not working. First, I can't create we link files anymore. When I try New Shortcut and put an URL, I get the following error message: Second, existent shortcuts are not working. The default context menu action (or double-click) is Print, which simply prints an empty page. If I try to see its properties, there's no URL there. Third, IE bookmarks are also not working. One difference is that the default action is Open, IE does nothing when I click it. Adding a new bookmark only creates one more dead link file. I'm almost sure this problem occurred after I tried to install IE 7 on Windows 7. Unfortunately, it didn't work because the OS seems to be bound to IE 8. I already tried to reinstall/repair IE 8, but it made no difference. Does anyone experienced a similar problem? I need a working solution, but I welcome any reasonable suggestion.

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