A special type of file that references a file or directory.

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6
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1answer
461 views

Why do some symbolic links affect program behavior?

One thing that has been puzzling me for some time is this: % which halt /sbin/halt % file /sbin/halt /sbin/halt: symbolic link to `reboot' However, executing sudo halt does, of course, not reboot ...
6
votes
1answer
2k views

list files by symlink target

How do I get list of files (and then do something with that list) by filtering through the symbolic link target name, and not the symlink name? For example from the following list I'm only interested ...
6
votes
2answers
12k views

How do I copy a symbolic link?

I have a symbolic link to a file in one directory. I would like to have that same link in another directory. How do I copy a symbolic link? I tried to cp the symbolic link but this copies the file ...
6
votes
2answers
8k views

Why change the owner of a symbolic link in linux?

In linux it's possible to change the owner or the group owner of a symbolic link (symlink). I was wondering why someone would want to do that, since permissions of a symlink are not used when ...
6
votes
2answers
9k views

How do you make samba follow symlink outside the shared path

This is Ubuntu server 10.04 64 and samba 3.4.7. I have a shared directory /home/mit/share and another one /home/temp that I link into the shared one: ln -s /home/temp /home/mit/share/temp But on ...
6
votes
1answer
147 views

cd and ls behave differently when inside a softlink to a dir

When we cd into a dir via its softlink, i observe: ls .. will show the content of the parent dir of the linked dir, while cd .. will go under the parent dir of the softlink. Why are they different? ...
6
votes
2answers
2k views

How to replace a symbolic link with a copy of a file it links to?

Having a (single, no batch filesystem processing needed) symlink, what a command line to use to replace it with a copy of the file it links to?
6
votes
1answer
148 views

Filetype and dereference when listing directory with LS command

I'm trying to combine arguments to the ls command to list a directory content. What I'm basically trying to achieve is listing the directory dereferencing all links, but showing explicitly that the ...
6
votes
4answers
2k views

Is there a standard symbolic link to the current users home directory?

The shell can expand ~ to your home directory. $HOME usually has the same deal, but often you want to refer to the current users home directory from a context that may not support such expansion. I ...
6
votes
2answers
383 views

Why wouldn't a symlink to a symlink work?

I've run into a weird issue when installing SWI-Prolog using homebrew on my OSX 10.9 box. I'm trying to debug it to figure out whose bug it is (SWI-Prolog's, homebrew's, or OSX's), so I can report it ...
6
votes
1answer
6k views

Copy symlink AND where it points to using rsync

It doesn't need to be done by rsync, but it would be nice not have to write a script to do this, and rsync is very close to what I want. "rsync -a" (or -l) can preserve symlinks, and -L can ...
6
votes
2answers
827 views

Find files that were not installed by the package manager

I'd like to get a list of all files in my Gentoo Linux system that were not installed by the package manager (Portage). This is because I want to keep my system as clean as possible, removing all ...
5
votes
2answers
6k views

How to copy directory structure without removing symlinks?

I need to "install" a bunch of files to another directory keeping the directory structure of the source files intact. For example, if I have ./foo/bar/baz.txt going to /var/www/localhost/webroot/ I ...
5
votes
2answers
803 views

Why do hard links seem to take the same space as the originals?

Thanks to some good Q&A around here and this page, I now understand links. I see hard links refer the same inode by a different name, and copies are different "nodes, with different names. Plus ...
5
votes
2answers
4k views

Get path of current script when executed through a symlink

I have a utility consisting of a couple directories with some bash scripts and supporting files that will be deployed to several machines possibly in a different directory on each machine. The ...
5
votes
3answers
2k views

Create symbolic links to files using wildcards

I want to create symlinks to multiple files: ln -s dev-*.php 's/dev-(.*\.php)/$1/' Results hoped for: site.php links to dev-site.php file.php links to dev-file.php What's the most ...
5
votes
3answers
786 views

Getting relative links between two paths

Say I have two paths: <source_path> and <target_path>. I would like my shell (zsh) to automatically find out if there is a way to represent <target_path> from <source_path> as ...
5
votes
3answers
364 views

cd to directory of a symbolically linked file

Before I write a script, anyone know an easy way to do the following: $ pwd /foo/bar $ ls -l lrwxr-xr-x 1 username admin 48 Apr 17 2012 foo.sh -> /bar/foo.sh $ cd /bar $ ls foo.sh i.e., in ...
5
votes
2answers
640 views

Is symlink's target relative to the destination's parent directory and if so, why?

I've got the following file structure: build/ client/ –> index.js And when I try to create a symbolic link named "client" inside the build directory that refers to the client directory in the ...
5
votes
3answers
552 views

How to ls using the long format (-l) while still following directory symlinks?

I've noticed that ls -l doesn't only change the formatting of the output, but also how directory symlinks are handled: > ls /rmn biweekly.sh daily.sh logs ... > ls -l /rmn lrwxrwxrwx 1 root ...
5
votes
4answers
704 views

find all symbolic links in a directory tree pointing outside that tree

I frequently move directory trees to other locations or copy their tarballs to other machines, and I would like to have a method to check whether any symlinks in a directory tree A point to locations ...
5
votes
1answer
316 views

How to replace a symbolic link with an equivalent hard link?

Having a (single, no batch filesystem processing needed) symlink, what a command line to use to turn it into a hard link to the same file?
5
votes
2answers
3k views

How does linux work with symbolic links?

I mean what's going on when some process wants to read a symlink? What's going on when something changes a symlink during a read or even write process? For example: I have 2 huge, similar 100G files ...
5
votes
2answers
98 views

Create symlink tree in existing directories

I carry all of my music around on a 1TB USB drive and have a udev rule to symlink it to $HOME/Music/ when I plug it in to one of my laptops, which it does. The issue I have is that this works fine ...
5
votes
3answers
1k views

How can I edit symlinks?

My basic understanding of a symlink is as a special file, a file that contains a string path to another file. The kernel's VFS abstracts a lot of that away but is there any reason why symlinks seem to ...
5
votes
1answer
552 views

Symbolic links with ls, mv: forcing the functions to utilize “logical” addresses (remembering the original path)

It seems that for many basic functions operating on symbolic links, the physical path is used by default. However, cd works fine. When moving into a symbolic link, cd remembers where I came from so it ...
5
votes
1answer
246 views

Symbolic Link with Existing Directory

If I already has a directory (A) with existing contents and another directory (B), how do I symbolic link such that the two directory's content merge. eg. A -> folderA1/ ...
5
votes
4answers
1k views

How do I get 'realpath' to find my symbolic link?

I am on MacOSX using bash as my shell. I have symbolic link, created like this: ln -s /usr/bin/python python2 I have a package that uses python2 and I want to create a symbol link in my current ...
5
votes
1answer
3k views

Does Windows recognize Linux's symbolic links?

I was just wondering how a Windows system handles symbolic links. My best guess is that it will not recognize them, but I'm not entirely sure. Also, what do Macs do when confronted by one?
5
votes
2answers
3k views

What causes ln: //: Is a directory?

When linking a directory to root, I get this error: $ ln -s ~/inbox/ / $ ln: //: Is a directory Bash autocompletes the directory path by adding a /. I've tried escaping without success. $ ln -s ...
5
votes
1answer
883 views

Cannot delete broken symbolic link

I have a symbolic link formerly pointing to a Dropbox directory. I don't know what I did wrong, but apparently now it points to itself. hyper@mypi:/home/hyper/test$ ls -l total 1024 lrwxrwxrwx 1 ...
5
votes
1answer
144 views

Can non-canonicalized forms of filesystem paths be significant? (eg. “foo//bar”, “foo/./bar”, and “foo/../bar”)

I have a script for building a particular flavor of GCC cross-compiler. Throughout the script there are many paths that are not in canonical form, such as duplicate path separators (/xxx/foo//bar/yyy) ...
4
votes
3answers
5k views

Adding to path vs. linking from /bin

Our sys admin installed a software (Maven) on the server, and told everyone to add the "/usr/local/maven/bin/" folder to their path. I think it could be more convenient to just link the few programs ...
4
votes
4answers
459 views

Symbolic link and hard link questions

Let's say /A/B/c.sh is symbolic linked to /X/Y/c.sh. If c.sh has the command "./SOMETHING", '.' means /A/B/ or /X/Y/? How about the hard link?
4
votes
4answers
2k views

Is chmod behavior wrong for symlinks?

Recently we had a problem on a Red Hat Linux box with many users: the /usr/bin/sudo binary has lost its sticky bit. Work was blocked until root user fix it (we need sudo for deploying and testing). ...
4
votes
6answers
1k views

ls content of a directory ignoring symlinks

I have a directory in which I would like to list all the content (files and sub directories) without showing the symbolic links. I am using GNU utilities on Linux. The ls version is 8.13. Example: ...
4
votes
6answers
2k views

Is it possible to “roll” a symlink to a new file without affecting any open file handles?

An application I am developing locally logs it's output to files formatted with the current timestamp such as app-%Y%m%d.log. To make it simple to be able to tail the current's day log in a terminal ...
4
votes
1answer
146 views

`cd` up the canonical path

Consider: $ pwd /home/user $ ls -l total 3604 lrwxrwxrwx 1 user user 19 Nov 27 12:11 pages -> /var/www/pages/ $ cd pages $ pwd /home/user/pages $ readlink -f . /var/www/pages $ cd .. $ readlink ...
4
votes
2answers
2k views

Resolving symbolic links (pwd)

Say I do the following: cd /some/path ln -s /target/path symbolic_name If then do: cd /some/path cd symbolic_name pwd I get: /some/path/symblic_name and not: /target/path Is there a way to ...
4
votes
3answers
822 views

Linux find and remove all symlinks relating to a directory

So, I have a bit of a situation where I created many symlinks in an attempt to get them to work, trying all sorts of combinations .. now I have this error: ls: cannot access /etc/sv/me: Too many ...
4
votes
2answers
857 views

Why is bash completion of a symlink different than a directory?

I usually do a find with an environment variable as the path when searching for source code. Recently I replaced my environment variable with a symbolic link, and it broke Bash's shell completion. ...
4
votes
2answers
759 views

Can we use symbolic link and hard link for directories?

I know we can do that for files. What about directories? It seems that cpanel uses that a lot.
4
votes
2answers
97 views

Quicker Way to Reference a Directory?

This one is probably easy for all of you, but I have never had to deal with such a nested local set of directories. If I have a path like: /mnt/media2/Archived\ Files/_Transfer/ is there a way to ...
4
votes
1answer
88 views

Is there a command to move a file, and symlink it back to where it was?

I often find myself wanting to move a file, then create a symlink where it was. In doing this by hand I tend to twist my mind. (Esp after doing half a dozen files) Use cases: Moving all my "dot ...
4
votes
1answer
131 views

Behavior of `du` command with `-L` flag

I've noticed a strange behavior with du command when it's used with -L command line option. I'm using Slackware 14 and Coreutils 8.19. To reproduce the strange behavior, create two folders: mkdir ...
4
votes
2answers
295 views

How Do I Block Read Access to a Symbolic Link?

I have this file structure: > APPLICATION 1 >> CONTROLLER (@JuniorProgrammers) >> MODELS (symlink to SHARED/MODELS) >> VIEWS (@Designers) > APPLICATION 2 >> CONTROLLER ...
4
votes
2answers
2k views

How does /dev/fd relate to /proc/self/fd/?

$ ls -l /dev/stdin /dev/fd/0 lrwx------ 1 tim tim 64 2011-08-07 09:53 /dev/fd/0 -> /dev/pts/2 lrwxrwxrwx 1 root root 15 2011-08-06 08:14 /dev/stdin -> /proc/self/fd/0 $ ls -l /dev/pts/2 ...
4
votes
2answers
75 views

Find all symlinks to a directory and change target to another directory

I have a bunch of symlinks in /home to files and sub-directories in /foo. I want to target the new directory, /bar. My approach was to look at all invalid symlinks and verify that they were pointing ...
4
votes
1answer
7k views

Change permissions for a symbolic link

I have a symlink with these permissions: lrwxrwxrwx 1 myuser myuser 38 Aug 18 00:36 npm -> ../lib/node_modules/npm/bin/npm-cli.js* The symlink is located in a .tar.gz archive. Now when I ...
4
votes
1answer
244 views

How do I cd up and down again with symlinks in bash?

Structure: /base/ +- somedir/ +- symlink/ -> /some_other_dir This command (in addition to my Makefiles) fails: cd /base/symlink ls ../somedir Bash complains that ../somedir does not ...