A hard link is a directory entry that associates a name with a file or directory on the file-system, in effect creating an alias that may reside elsewhere on the file-system.

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32
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3answers
4k views

What are the various link types in Windows? How do I create them?

Is it possible to link two files or folders without having a different extension under Windows? I'm looking for functionality equivalent to the soft and hard links in Unix.
25
votes
2answers
10k views

What is the difference between NTFS hard links and directory junctions?

The title says it all... what's the difference? When do I use one and when do I use the other? Added: Note that Junction points, Hard links and Symbolic (soft) links are three separate things on ...
19
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7answers
21k views

How can you see the actual hard link by ls?

I run ln /a/A /b/B I would like to see at the folder a where the file A points to by ls.
15
votes
4answers
9k views

Using mklink /h results in “Access is denied.”

From command prompt with Administrator privilages: c:\>mklink /h c:\dirA c:\Users\Piotr\dirB Access is denied. I'm on Vista x64. Using /j or /d instead of /h works. What's the problem? Related: ...
11
votes
2answers
12k views

Make a hard link without extra programs in Windows 7

My objective here is to synchronize my emule credit file (application.dat?) by Dropbox. But the credit file is not inside the Dropbox directory (by default). So I want to make a hard link to get this ...
11
votes
4answers
4k views

Using NTFS hard links to combine full/differential backups

Short: Is it possible to (robo)copy a directory tree using hard links instead of physical copy? I want to make a daily backup of my data files, every day in it's own directory. Now most files don't ...
9
votes
2answers
5k views

Finding all symbolic and hard links to a file on UNIX

If I have a specific file in a UNIX filesystem, is there a way to use bash to find all links to that file, both symbolic and hard? If I need different commands for each, what are they?
9
votes
3answers
2k views

How can I check the actual size used in an NTFS directory with many hardlinks?

On a Win7 NTFS volume, I'm using cwrsync which supports --link-dest correctly to create "snapshot" type backups. So I have: z:\backups\2010-11-28\cygdrive\c\Users\... ...
8
votes
4answers
1k views

What is a hard link in Linux?

I have searched around and am trying to understand the difference between a hard link and symbolic link (soft link). I found this link is quite useful. But I am still not very clear. I understand ...
8
votes
2answers
3k views

How can I find hard links on Windows?

I've created some hard links on my Windows 7 file system using mklink. It was some time ago and I can't remember for sure where, or which files. When I use Explorer, all files look the same. When I ...
6
votes
3answers
3k views

How do you create a working Hard Link in OSX?

Ok, this has me banging my head. In OS X, to create a hard link, in a terminal window, you're supposed to be able to just type this... ln a.txt b.txt ...and this should create a hard link from ...
6
votes
4answers
4k views

What are the advantages of symlinks over hard links and viceversa?

I understand the differences between symbolic and hard links, but I've never understood why choose one or the other.
6
votes
2answers
5k views

Executing symbolic link to exe - “The specified path does not exist”

When trying to execute a symbolic link which points to an exe file (on Windows 7), the "Open with" windows appears. When renaming it to a ".exe" file, it says "The specified path does not exist. Check ...
5
votes
2answers
600 views

What are hardlinks on windows 7?

What are hardlinks and how are they different from files? If i have a hardlink would all apps believe the link is a file? (I had programs not open files because they were shortcuts) If i modify a ...
5
votes
2answers
483 views

How do I delete a hard link to an executable I don't own?

I used the following command to create a hard link to an executable: ln `which xcrun` gcc The link worked as expected. However, it seems I don't have the permissions to remove it. $ rm gcc ...
5
votes
1answer
3k views

How to create a directory hard link in Windows?

I was trying to create a directory hard link (not a symbolic one). I've tried this: mklink /d /h newfolder currentfolder but it's telling me Access is denied. I don't understand how is access denied ...
5
votes
1answer
936 views

Why does du -sl show different sizes for the source and result of a cp -rl?

I have used cp -rl to copy a folder. When measuring the size of the source and of the result of the copy du -sl returns slightly different sizes, even though diff confirms that their content are ...
4
votes
2answers
1k views

Detect if two files are hard linked in Windows XP

I know I can use the command fsutil hardlink <new_file> <existing file> To create a hard link from the command prompt. My question is: is there a command line tool that will allow me ...
4
votes
2answers
2k views

Windows 7 mklink - hard link's attributes (expected !) + contents do not affect the linked file

Now - this is driving me crazy. I created a hard link pointing to a file in my dropbox dir - the link was created inside a folder where this file needs to be in order to be accessed by the programs I ...
4
votes
1answer
219 views

Can I save space in a Maildir by hard-linking identical message files?

Obviously, the answer to the question in the title is yes. But I really want to know if I can do it without breaking anything. I am using offlineimap to back up my Gmail account to a Maildir on my ...
4
votes
1answer
314 views

Unix: softlinks, hardlinks

I am somewhat confused what the differences between a softlink, and a hardlink are (on unix). It seems like a softlink is the same as a shortcut in windows or an alias on Mac OS X. (Can someone ...
4
votes
2answers
444 views

What are the pitfalls of hardlinked files on my desktop PC?

All the identical-content files on my PC are now hardlinked. (My data is completely de-duplicated. It is a consequence of the way I copied my data from my old computer.) What pitfalls do I need to ...
4
votes
2answers
214 views

Hard/SymLinks and Alternate Data Streams

An interesting thought just occurred to me while thinking about NTFS. NTFS supports hard links, symbolic links, and Alternate Data Streams. Is it possible for an ADS to be a link to another file? ...
4
votes
2answers
1k views

Unable to preserve hard links. Why?

I'm trying to create a Makefile that would automate remastering Knoppix distribution. I'm trying to copy filesystem from the read-only compressed loop device to normal filesystem to be able to modify ...
3
votes
1answer
1k views

Hard link not works under Mac OS X in GUI mode

I faced a little strange behavior, while using hard links. From Terminal, I create a text file 1.txt and a hard link "to this file" nano 1.txt mkdir dir ln 1.txt ./dir/ I check the resulting hard ...
3
votes
2answers
716 views

What is “ln -L” (--logical) for?

I can read in the ln man page: -L, --logical make hard links to symbolic link references I read somewhere that ln -L could be used to re-link files that were deleted but which are ...
3
votes
3answers
5k views

Windows7 hardlink over two different drives

I am trying to create a hardlink on my C drive that points to a file on my D drive. I open up a terminal with Administrator privileges and try the following: C:\Users\sandro>mklink /H _vimrc ...
3
votes
1answer
147 views

Editing softlinked files in UNIX

Let's say I have file A, and using 'ln -s A B', I have B. When I open, edit and save B, now B is not symlink anymore. It's just a new copy of A. Is this expected behavior? I use Mac OS X, and I ...
3
votes
2answers
978 views

How can I find all hardlinked files on a filesystem?

I need to find all hardlinked files on a given filesystem. E.g. get a list of files, each line contains linked pairs, or triplets, etc. I understand more or less how to do it, one needs to create a ...
3
votes
3answers
1k views

How to properly store dotfiles in a centralized git repository

I'd like to put all my dotfiles (like .profile, .gitconfig, etc.) in a central git repository, so I can more easily keep track of the changes. I did this, but I would like to know how to properly ...
3
votes
2answers
298 views

What operations breaks the hardlinks?

I have a file "a.txt" and its hardlink "ha.txt". If I open either of those files in notepad and save any changes it would appear in both files as they are still linked. But if I overwrite (copy) a.txt ...
3
votes
2answers
1k views

What's the difference between a Windows hard link and a Linux hard link?

The open source package BackupPC does not run on Windows due to its lack of support for hard links. I did a search and came across this document referring to hard links in Windows. Are these somehow ...
3
votes
3answers
880 views

How to transfer a Time Machine to an NTFS partition (or how to copy HFS+ hard links)

Do you know a way to copy HFS+ hard links to a folder on a HFS+ or NTFS drive? Before you say it can't be done, I don't want actual backing up functionality of Time Machine, just the ability to ...
3
votes
1answer
729 views

What happens when I backup a symbolic link to a briefcase?

The story: I recently started trying DropBox. After some fiddling, I found I could use an app, DropBoxFolderSync, to sync a folder with DropBox, leaving something called a "Symbolic Link" (which seems ...
3
votes
1answer
458 views

Is it possible to delete a hardlink to a locked file?

In short, I need to do what was asked here: One hardlink is locked. How do I remove the other? The given solution doesn't work for me as I'm trying to create/delete a hardlink to a file that is in ...
3
votes
2answers
179 views

hardlinking takes a lot of space

I made an rsync incremental backup script for my server that will copy a MySQL database backup and a specified folder path to a remote server. Here's the code on Github. Code excerpt from lines ...
2
votes
1answer
323 views

Can someone make sense out of “Hard Links and Junctions” article from MSDN?

At Hard Links and Junctions MSDN article one can read the following: A hard link is the file system representation of a file by which more than one path references a single file in the same ...
2
votes
3answers
834 views

hardlinks on ntfs with windows

How can I create hardlinks for a file on an NTFS partition using Windows? NTFS can obviously handle hardlinks, since creating them with NTFS-3g works – the links even work in Windows. Is this the ...
2
votes
3answers
2k views

Make hard-link from Windows' Desktop to cygdrive

When I open Cygwin, I want that I can see the Desktop -folder (I do not want to move its original location, I think the thing I want is hard-link with ln -cmd -- but not sure, this is my first idea to ...
2
votes
2answers
129 views

Windows hard links for directories

How can I make hard links for directories in Windows 7? That means that the 2 (or more?) linked directories refer to the same inode (group of inodes) so they will be exact duplicated and every change ...
2
votes
2answers
91 views

Netbeans destroys hardlinks on save

I am using Netbeans 7.0.1 on a Linux system. I have a file module/test.php and another one application/module/test.php Both test.php files are hardlinks of each other. When I change ...
2
votes
3answers
742 views

How much space do NTFS hardlinks/symlinks occupy?

Well, I guess it must be something proportional to the original filename plus the new filename for symlinks, and only the new filename for hardlinks, but how does this affect the disk space exactly? I ...
2
votes
1answer
409 views

Generate a list of files by piping output of find command into another find command?

I need to generate a list of files for use in a shell script. The list should be all files (in a specified directory) that are hardlinked. I want to replace the hardlinks with symlinks. (Obviously, ...
2
votes
1answer
199 views

Using junctions to get all my user files on the backup drive

I generally prefer to back up just my data files, and not my program files, since I can always reinstall the programs. This is easier if I put programs on one hard drive and data on another. But ...
2
votes
1answer
91 views

TextEdit not caring about hard links? [duplicate]

Possible Duplicate: Hard link not works under Mac OS X in GUI mode I did a little experiment. First I ran the following in a Terminal: mkdir test cd test echo "A" > a echo "B" > b ln ...
2
votes
1answer
73 views

copying a file to a hard link

I recently got bit by a misbehaving in a bash script of mine and was wondering: is this the expected system behavior, or is it a bug what are the ideal workarounds Essentially, the problem boiled ...
2
votes
1answer
784 views

Using hard links to move Windows Users folder

I'm currently trying to move bulky folders from my SSD to my HDD (my Users folder and ProgramData folder). I'm following a short guide on using Directory Junctions to do this effectively. However, ...
2
votes
2answers
336 views

Make hard links as I copy a directory

I would like to create a bat file to copy a directory, with everything in it (sub-directories, including hidden directories) - by making hard links. I tested xcopy %source% %destination% /E /C /R /I ...
2
votes
1answer
68 views

Virtual join-directory on Windows

Problem: Say I have a video spanned over 2 files (vid001.avi & vid002.avi) and each file is on a seperate CD/DVD. If the 2 files are in the same directory my player will automatically play the ...
2
votes
1answer
602 views

Accessing files obscured by filesystem mounted at non-empty directory

I wish to mount a volume/filesystem at a non-empty directory, yet still retain access to the directory's contents. Is this possible? I know that a filesystem can be mounted at a non-empty directory ...