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| ln | |
|---|---|
&sq=Apple WWDC &lang=en&file=File:Ln-example-command.gif) Example usage of ln utility | |
| Original author(s) | AT&T Bell Laboratories |
| Developer(s) | Various open-source and commercial developers |
| Initial release | November 3, 1971 |
| Operating system | Unix, Unix-like, IBM i |
| Platform | Cross-platform |
| Type | Command |
| License | coreutils: GPLv3+ |
ln is a shell command for creating a link file to an existing file or directory.[1] By default, the command creates a hard link, but with the -s command line option, it creates a symbolic link.[2] Most systems disallow a hard link to a directory since such links could disrupt the structure of a file system and interfere with the operation of other utilities.[3] The command can create a symbolic link to non-existent file.[4]
The command appeared in Issue 2 of the X/Open Portability Guidelines.[5] The version in GNU Core Utilities was written by Mike Parker and David MacKenzie.[6] The command is available in Windows via UnxUtils[7] and has been ported to IBM i.[8]
- ^ Kernighan, Brian W.; Pike, Rob (1984). The Unix programming environment. Englewood Cliffs, N.J.: Prentice-Hall. p. 59. ISBN 013937681X.
- ^ "ln - The Open Group Base Specifications Issue 7". pubs.opengroup.org. The IEEE and The Open Group. Retrieved 7 August 2015.
- ^ "Why are hard links not allowed to directories in UNIX/Linux?". unix.stackexchange.com. Retrieved 7 August 2015.
- ^ Cite error: The named reference
GNULnmanwas invoked but never defined (see the help page). - ^ Cite error: The named reference
SUSwas invoked but never defined (see the help page). - ^ – Linux General Commands Manual
- ^ "Native Win32 ports of some GNU utilities". unxutils.sourceforge.net.
- ^ IBM. "IBM System i Version 7.2 Programming Qshell" (PDF). IBM. Retrieved 2020-09-05.
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