Alias vs symbolic link mac os x


  1. Symbolic Link vs Alias - krypted
  2. Create Symbolic Links With the ln Command
  3. Alias (Mac OS)
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For instance, bash builtin commands pwd and cd operate on the current logical directory. When any path is used with a system call, any use of.. So, cd.. Junction points are for directories only, and moreover, local directories only; junction points to remote shares are unsupported. Not all standard applications support reparse points. Most noticeably, Backup suffers from this problem and will issue an error message 0x [13] when the folders to be backed up contain a reparse point.

Shortcuts , which are supported by the graphical file browsers of some operating systems, may resemble symbolic links but differ in a number of important ways. One difference is what type of software is able to follow them:. Almost like shortcuts, but transparent to the Windows shell. Folder shortcuts are created and used from the Windows shell in the network neighborhood for example. The shell objects [17] or shell folders are defined in the Windows registry and can be used to implement a sort of symbolic link too.

Like folder shortcuts, they are transparent to the Windows shell. The My Documents folder on the Desktop as well as the Fonts and the Administrative Tools folders in the Control Panel are examples of shell objects redirected to file-system folders. It uses identical programming and user utility interfaces as Unix see above , but creates Windows shortcuts.

Additionally, Cygwin can be set up to support native Windows symbolic links which can be used out of Cygwin without restrictions.

Symbolic Link vs Alias - krypted

Some differences exist, however. Cygwin has no way to specify shortcut-related information — such as working directory or icon — as there is no place for such parameters in ln -s command.

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To create standard Microsoft. The Cygwin User's Guide [18] has more information on this topic. The command creating symbolic links is makelink , which is also used for hard links. Internally the dos. The AmigaDOS shell will follow links automatically. However, shadows, due to the fully object-oriented System Object Model, are considerably more powerful and robust than a simple link.

For example, shadows do not lose their capabilities when renamed or when either the object or subject of the link is relocated. Symbolic links may be implemented in a context-dependent or variable fashion, such that the link points to varying targets depending on a configuration parameter, run-time parameter, or other instantaneous condition. A variable or variant symbolic link is a symbolic link that has a variable name embedded in it.

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This allows some flexibility in filesystem order that is not possible with a standard symbolic link. Variables embedded in a symbolic link may include user and environment specific information. Tru64 uses a context dependent symbolic link where the context is the cluster member number. Pyramid Technology 's OSx Operating System implemented conditional symbolic links which pointed to different locations depending on which universe a program was running in.

This article is based on material taken from the Free On-line Dictionary of Computing prior to 1 November and incorporated under the "relicensing" terms of the GFDL , version 1. From Wikipedia, the free encyclopedia. Main article: Alias Mac OS. Main article: NTFS symbolic link.

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  • Main article: NTFS junction point. Lexical file names in Plan 9 or getting dot-dot right PDF. IEEE Std Manual pages for FreeBSD Link Shell Extension website. Retrieved 23 March Microsoft Developers Network. Microsoft Corporation.

    Create Symbolic Links With the ln Command

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    Alias (Mac OS)

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    Symbolic link becomes invalid. Junction becomes invalid. Hard link remains valid. First it attempts to find the file via the filepath, and if that fails then I believe it looks for the name of the object and its type and creator. If all else fails for instance if you trashed the item it will pop up a dialog to ask the user to find the linked file.

    Ok, there are errors in both of the above posts. They are known as hard links, soft links or symlinks , and aliases. A hard link is essentially a second entry in the file system pointing to the same data. If you create a hard link to a file, there is no sense in which one of the links is the "original" file and the other is a link. They are both equivalent. If you edit the data under one name, and then look at the other file, it will be edited as well, because they share the same data. A hard link necessarily must point to a file on the same file system partition.

    I believe that some unix systems let you make hard links to directories, but only if you are root, and only under certain circumstances. I don't know much about this. A soft link is a seperate file which points to another file via its path. A soft link can exist even if the original file is deleted or moved, but it just points to nothing.

    Symbolic link

    Different unix programs for example "ls" treat soft links differently. Because it is a seperate file, a program has to distinguish between the pointer and the file itself. For example, if you delete a softlink with "rm" you are deleting the link, not the thing it points to.

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    An alias is very similar to a soft link, except that it points to a file via its HFS handle. So, if you move or rename a file, the alias still works. If you move it to another file system, however, it doesn't I think. While in general this method is more robust than softlinks, it still has its disadvantages.

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    For example, if a program saves a file by writing a new file and then deleting the original, rather than editing the original, then an alias will be broken. I think that most Mac and Unix do this, though, but for different reasons Mac programs do it so aliases will still work, Unix programs do it so hardlinks will still work. Soft links look like aliases in the finder, but aren't. I'm pretty sure you can create hard links as well, but the Darwin team had to use some virtual file system trickery to make it work, as HFS doesn't support it natively I think.

    Thanks- that makes sense and is somewhat in line with what I thought, but it clarified a few issues for me. How would I go about setting up a symlink in OSX? Just throught I'd mention that if you create a hardlink to a file, that file will only be deleted when nothing points to its inode. Meaning if you create a hard link with: "ln name1 name2" then the file won't go away until you rm both name1 and name2. You create links using the ln command man ln for more. By default, ln creates hard links.

    By using the -s switch you can create symbolic links. There is no way to create a symlink or a hard link for that matter with the OS X finder. You have to use the "ln" command as mentioned a bove. Whether an alias or symlink is more appropriate depends on the task. This can be tricky.

    Suppose you want a link to a person's desktop.