- NetBSD Manual Pages
LN(1) NetBSD General Commands Manual LN(1)
Powered by man-cgi (2020-09-24).
Maintained for NetBSD
by Kimmo Suominen.
Based on man-cgi by Panagiotis Christias.
ln -- make links
ln [-fhinsv] source_file [target_file]
ln [-fhinsv] source_file ... target_dir
The ln utility creates a new directory entry (linked file) which has the
same modes as the original file. It is useful for maintaining multiple
copies of a file in many places at once without using up storage for the
``copies''; instead, a link ``points'' to the original copy. There are
two types of links; hard links and symbolic links. How a link ``points''
to a file is one of the differences between a hard or symbolic link.
The options are as follows:
-f Unlink any already existing file, permitting the link to occur.
-h If the target_file or target_dir is a symbolic link, do not follow
it. This is most useful with the -f option, to replace a symlink
which may point to a directory.
-i Cause ln to write a prompt to standard error if the target file
exists. If the response from the standard input begins with the
character `y' or `Y', then unlink the target file so that the link
may occur. Otherwise, do not attempt the link. (The -i option
overrides any previous -f options.)
-n Same as -h, for compatibility with other ln implementations.
-s Create a symbolic link.
-v Cause ln to be verbose, showing files as they are processed.
By default ln makes hard links. A hard link to a file is indistinguish-
able from the original directory entry; any changes to a file are effec-
tive independent of the name used to reference the file. Hard links may
not normally refer to directories and may not span file systems.
A symbolic link contains the name of the file to which it is linked. The
referenced file is used when an open(2) operation is performed on the
link. A stat(2) on a symbolic link will return the linked-to file; an
lstat(2) must be done to obtain information about the link. The
readlink(2) call may be used to read the contents of a symbolic link.
Symbolic links may span file systems and may refer to directories.
Given one or two arguments, ln creates a link to an existing file
source_file. If target_file is given, the link has that name;
target_file may also be a directory in which to place the link; otherwise
it is placed in the current directory. If only the directory is speci-
fied, the link will be made to the last component of source_file.
Given more than two arguments, ln makes links in target_dir to all the
named source files. The links made will have the same name as the files
being linked to.
link(2), lstat(2), readlink(2), stat(2), symlink(2), symlink(7)
The ln utility conforms to IEEE Std 1003.2-1992 (``POSIX.2'').
The -v option is an extension to IEEE Std 1003.2-1992 (``POSIX.2'').
A ln utility appeared in Version 6 AT&T UNIX.
NetBSD 5.0 October 29, 2007 NetBSD 5.0