Команда ln
Creates a link to a file.
ln [-f] [-n] [-s] existingfile newname
| -f | Link files without questioning the user, even if the mode of target forbids writing. This is the default if the standard input is not a terminal. |
| -n | Does not overwrite existing files. |
| -s | Makes it so that it does not create a symbolic link (not on System V.) existingfile - The file that you want to create a new link. |
| existingfile | Specifies file(s) that you want to create a link to. |
| newname | The new name of the file. |
| directory | The directory were you want the new link. |
ln public_html/myfile.txt
Would create a hard link to myfile.txt in the current directory assuming that it is not public_html. Note: A link cannot be created to a file if currently in the directory where the file exists.
ln -s file1 file2
Creates a symbolic link to file1 with the name of the file2.