linux - soft - symbolic link vs hard link




How to symlink a file in Linux? (12)

I want to make a symbolic link in Linux. I have written this bash command where the first path is the folder I want link into and the second path is the compiled source.

ln -s '+basebuild+'/IpDome-kernel/kernel /home/build/sandbox/gen2/basebuild/IpDome-kernel/kernal 

Is this correct?


Creating Symbolic links or Soft-links on Linux:

Open Bash prompt and type the below mentioned command to make a symbolic link to your file:

A) Goto the folder where you want to create a soft link and typeout the command as mentioned below:

$ ln -s (path-to-file) (symbolic-link-to-file)

$ ln -s /home/user/file new-file

B) Goto your new-file name path and type:

$ ls -lrt (To see if the new-file is linked to the file or not)

Example:

ls -lrt

lrwxrwxrwx 1 user user 24 Aug 6 23:40 new-file -> /home/user/file

Note: Where, A -> B Means, A is symbolically linked to B


(Because an ASCII picture is worth a thousand characters.)

An arrow may be a helpful mnemonic, especially since that's almost exactly how it looks in Emacs' dired.

And big picture so you don't get it confused with the Windows' version

Linux:

ln -s target <- linkName

Windows:

mklink linkName -> target

You could also look at these as

ln -s "to-here" <- "from-here"
mklink "from-here" -> "to-here"

The from-here should not exist yet, it is to be created, while the to-here should already exist (IIRC).

(I always get mixed up on whether various commands and arguments should involve a pre-existing location, or one to be made.)

EDIT: It's still sinking in slowly for me; I have another way I've written in my notes.

ln -s (target exists) (link is made)
mklink (link is made) (target exists)

How to create symlink in vagrant. Steps:

  1. In vagrant file create a synced folder. e.g config.vm.synced_folder "F:/Sunburst/source/sunburst/lms", "/source" F:/Sunburst/source/sunburst/lms :- where the source code, /source :- directory path inside the vagrant
  2. Vagrant up and type vagrant ssh and go to source directory e.g cd source
  3. Verify your source code folder structure is available in the source directory. e.g /source/local
  4. Then go to the guest machine directory where the files which are associate with the browser. After get backup of the file. e.g sudo mv local local_bk
  5. Then create symlink e.g sudo ln -s /source/local local. local mean link-name (folder name in guest machine which you are going to link) if you need to remove the symlink :- Type sudo rm local

I find a bit confusing the terminologies "target" and "directory" in the man information.

The target is the folder that we are symlinking to and the directory the actual symlink (not the directory that you will be symlinking to), if anyone is experiencing the same confusion, don't feel alone.

This is my interpretation of creating a Symlink (in linux):

ln -s /FULL/PATH/FOLDER-OR-FILE-SYMLINKING-TO NAME-OF-YOUR-SYMLINK

You can navigate to the folder where you want to create the symlink and run the command or specify the FULL PATH for your symlink instead of NAME-OF-YOUR-SYMLINK.

cd /FULL/PATH/TO/MY-SYMLINK-PARENT-FOLDER
ln -s /FULL/PATH/FOLDER-OR-FILE-SYMLINKING-TO NAME-OF-YOUR-SYMLINK

OR

ln -s /FULL/PATH/FOLDER-OR-FILE-SYMLINKING-TO /FULL/PATH/TO/MY-SYMLINK-PARENT-FOLDER/NAME-OF-YOUR-SYMLINK

I hope this helps to those (still) slighly confused.


If you are in the directory where you want to create symlink, then ignore second path.

cd myfolder
ln -s target

It will create symlink of target inside myfolder.

General syntax

ln -s TARGET LINK_NAME

There are two types of links:

symbolic links: Refer to a symbolic path indicating the abstract location of another file

hard links: Refer to the specific location of physical data.

In your case symlinks:

ln -s source target

you can refer to http://man7.org/linux/man-pages/man7/symlink.7.html

you can create too hard links

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.

ln source link

To create a new symlink (will fail if symlink exists already):

ln -s /path/to/file /path/to/symlink

To create or update a symlink:

ln -sf /path/to/file /path/to/symlink

To create a symbolic link /soft link, use:

ln -s {source-filename} {symbolic-filename}

e.g.:

ln -s file1 link1

ln -s EXISTING_FILE_OR_DIRECTORY SYMLINK_NAME

ln -s TARGET LINK_NAME

Where the -s makes it symbolic.



ln [-Ffhinsv] source_file [target_file]

    link, ln -- make links

        -s    Create a symbolic link.

    A symbolic link contains the name of the file to which it is linked. 

    An ln command appeared in Version 1 AT&T UNIX.




symlink