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

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30
votes
7answers
16k views

What is the difference between symbolic and hard links?

When would you use one over the other?
8
votes
1answer
431 views

Is there a way to make perl -i not clobber symlinks?

A friend of mine points out that if you do: perl -pi.bak -e 's/foo/bar/' somefile when "somefile" is actually a symlink, perl does just what the docs say it will do: It does this by renaming ...
1
vote
1answer
752 views

apache symlinks and dokuwiki

I am running a dokuwiki on an apache webserver. Usually I put media files into the directory /var/lib/dokuwiki/data/media. However, to be more flexible and to save disk space, it would be nice to use ...
11
votes
4answers
1k views

Should I include a trailing slash / in a symlink to a directory?

Symlinking to a directory gives to different results with ls -l depending on whether I ln -s dir or ln -s dir/. But what's the actual difference, and which one should I prefer why?
7
votes
5answers
1k views

Dynamic Symlinks

I have built my app for different architectures and would like to create a "dynamic symlink" which takes me to the right version based on a variable. If the machine I am currently logged in to, is ...
0
votes
1answer
332 views

Keeping multiple root directories in a single partition

I'm working out a partition scheme for a new install. I'd like to keep the root filesystem fairly small and static, so that I can use LVM snapshots to do backups without having to allocate a ton of ...
5
votes
2answers
600 views

Find incoming symlinks

In Linux, what is the best way to find all symbolic links that point to a given file (regardless of whether the symlink is relative or absolute)? I realize this will require scanning the whole ...
15
votes
2answers
2k views

pwd without symlinks

If I do pwd I notice it uses whatever symlinks I used to get into the current directory. Can I get it to tell me the "real" directory I'm in ... i.e. the path from the root to my current directory ...
6
votes
1answer
481 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 ...
0
votes
1answer
492 views

Inconsistency in behavior of 'rm' when a mounted volume is involved?

If I run the following sequence of commands: mkdir dir ln -s dir link rm -r link/ I get this output: rm: cannot remove `link': Not a directory I get the warning because I could simply have ...
6
votes
2answers
12k 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 ...
11
votes
4answers
3k views

How does one atomically change a symlink to a directory in busybox?

I am trying to (as close as possibly) atomically change a symlink. I've tried: ln -sf other_dir existing_symlink That just put the new symlink in the directory that existing_symlink pointed to. ln ...
8
votes
3answers
2k views

Providing /bin and /lib inside a chroot jail

I need to be able to provide the /bin and /lib directories inside a chroot jail so that programs can dynamically link properly. Is there a way to accomplish this without making a copy of the /bin and ...
1
vote
1answer
369 views

Using find to find symlinks that point to a certain pattern of files

I have several directories that all have various symlinks in them. I want find (or another program) to find based on where the symlinks point to. For example this is how it currently works: ...
3
votes
2answers
3k views

How do I see what symlinks exist for a given directory?

I want to do some housekeeping in a directory, and I want to see if a given directory has any symlinks pointing to it. I can easily enough see what directory a symlink points to, but now I want to see ...
9
votes
1answer
144 views

Strategies for maintaining a reference to a file after it was moved or renamed?

I've had a mac at work lately, and was amazed to see that Xcode would still find my latest project after I renamed its folder and moved it someplace else. Now I understand that this is the result of ...
7
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 ...
14
votes
2answers
11k views

Do symbolic links actually make a difference in disk usage?

I've read in so many websites that, in Linux, symbolic links (soft links, symlinks) are just like pointers that reference another file, which may be located anywhere (like Windows shortcuts). However, ...
2
votes
2answers
1k views

Keep tracking of symbolic links?

I use symbolic links quite often, but after moving the original file, I lose track of the symbolic link. I also use symbolic links for keeping track of some files in the same directory, but again, I ...
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 ...
4
votes
4answers
465 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?