Junction Points (also commonly referred to as NTFS Junction or Directory Junction) is a type of reparse point which contains a link to a directory that acts as an alias of that directory. Junction points are a Windows exclusive feature, absent in other operating systems. Compatibility with Legacy Windows OS and less privilege requirement makes Junction Points a good alternative for
symlinks. In this article, we will take a look at methods used for the creation of junction points on Windows OS.
Description of the command :
Mklink /J Link Target
Description of command as follows.
/J : Creates a Directory Junction
Link : Specifies the new symbolic link name.
Target : Specifies the path (relative or absolute) that the new link refers to.
Note -
The above text is a stripped-out section out of mklink help page.
Creating a Junction Point :
Junction points can be created both relatively or absolutely, but they would always refer to the
Target path in an absolute manner. Therefore, regardless of whether the link was created using relative paths or using absolute paths, the final target path would be absolute.
In the following example we would be creating an Junction Point to the Directory having
C:\suga path in our Operating System.
To create a junction point at a different path (C:\Users\Public\), the command would look as follows.
mklink /J "C:\Users\Public\Junction_PT" "C:\suga"
Note -
We have provided both source and Target paths as absolute, for the sake of simplicity.
Where
C:\Users\Public\Junction_PT is the full path to our newly created junction. After the execution of the above command, a Directory Junction would be created at the Link path, which could be confirmed by its entry of type
<JUNCTION> in the output of
dir command on the newly created junction's parent directory.
Volume in drive C has no label.
Volume Serial Number is 2C7D-7820
Directory of C:\Users\Public
09/18/2020 06:22 PM <DIR> .
09/18/2020 06:22 PM <DIR> ..
09/18/2020 09:28 AM <DIR> Documents
06/22/2020 11:25 PM <DIR> Downloads
09/18/2020 06:22 PM <JUNCTION> Junction_PT [C:\suga]
06/22/2020 11:25 PM <DIR> Music
06/22/2020 11:37 PM <DIR> Pictures
06/22/2020 11:25 PM <DIR> Videos
0 File(s) 0 bytes
8 Dir(s) 36, 849, 307, 648 bytes free
Note -
Bolded the field we are interested in.
The junction point
(Junction_PT) would have a similar appearance to this.
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