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![]() Both Linux / UNIX allows the data of a file to have more than one name in separate places in the same file system. Such a file with more than one name for the same data is called a hard-linked file. A hard link to a file is indistinguishable from the original directory entry; any changes to a file are effectively independent of the name used to reference the file. Hard links may not normally refer to directories and may not span file systems.
ADVERTISEMENTS How to create a hard links in Linux or Unix
To create a hard links on a Linux or Unix-like system:
Let us see examples to make a hard link on a Linux / Unix systems.
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ln command example to make a hard link on a Linux
The ln command make links between files. By default, ln makes hard links.
ln Command Syntax T Create Hard Link in Linux![]()
The syntax is as follows for Unix / Linux hard link command:
Where,
To create hard link for foo file, enter:
echo 'This is a test' > foo Sample outputs:
Where,
How do I delete a hard link on Linux or Unix?
The rm command deletes files on Linux or Unix including a hard link. However, data is still accessible as long as another hard link exists even if you delete source file. To get rid of data you must remove all hard links including source.
Use the rm command:
$ echo 'I love Linux and Unix' > file.txt Hard Links Limitations on Linux and Unix
There are some issues with hard links that can sometimes make them unsuitable. First of all, because the link is identical to the thing it points to, it becomes difficult to give a command such as “list all the contents of this directory recursively but ignore any links”. Most modern operating systems don’t allow hard links on directories to prevent endless recursion. Another drawback of hard links is that they have to be located within the same file system, and most large systems today consist of multiple file systems.
How to create symbolic (soft) links in Linux or Unix
The syntax is as follows:
In this following example, create a soft links to postupload.sh as cmspostupload.sh and faqpostupload.sh
$ ln -sv postupload.sh cmspostupload.sh Verify it: $ ls -li postupload.sh cmspostupload.sh faqpostupload.sh Link For Os X Nk XConclusion
You learned how to use the ln command to create hard and soft links on Linux or Unix-like system including limitations and how to delete hard links. For more info see GNU/ln command page here.
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