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Chapter 24 Other Ways to Get Disk Space
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You might have copies of the same file in several directories because:
-
Several different users need to read it (a data file, a program setup file, a
telephone list, etc.).
-
It's a program that more than one person wants to use.
For some reason, you don't want to keep one central copy and put its directory
in your
search path (
8.7
)
.
-
The file has a strange name or it's in a directory you don't usually use.
You want a name that's easier to type, but you can't use
mv
.
ln
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Instead of running
cp
, think about
ln
.
(Your system should have
ln
.
But it comes with the GNU fileutils, so it's on the Power Tools
disc too.)
There are lots of advantages to
links (
18.3
)
.
One big advantage of hard links is that they don't use any disk space.
[1]
The bigger the file, the more space you save with a link.
A symbolic link always takes some disk space, so a hard link might be better
(unless you have to link across filesystems so hard links can't be used). |
Some people don't use links because they think all links to a file need to
have the same name.
That's not true.
A link can be named
myfile
in one directory and
file.allan
in
another directory-UNIX keeps it all straight.
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