Mikkel L. Ellertson wrote:
Gene Heskett wrote:
Mikkel L. Ellertson wrote:
There is only one file. There are just 3 file names pointing to it.
Even though the file is in 3 different directories, there is no
master file. They all access the same location on the hard drive, so
changing one has the effect of changing 3 files. But deleting one
file name does not delete the file. It is there until all the file
names pointing to it are deleted. You can see how many file names
are linked to a file by running "ls -l <file name>".
[mikkel@toshiba devices]$ ls -l ifcfg-eth0
-rw-r--r-- 3 root root 128 May 15 17:35 ifcfg-eth0
The 3 in this case means that there are 3 file names pointing to the
same file. If you want to know how to create files like this, look
at the ln command.
Mikkel
Ok, I'll take your word for the edit 1 edit all, but why did I have to
edit all 3 copies before a change in the MAC address was effected?
How did you edit the files? Most text editors are aware of hard
linked files, and modify the original file, so it does not matter
what file you edit. I am not sure about word processors, as I do not
use them to edit config files.
One word, vim. All the rest are eye candy, and I'm mentally diabetic in
addition to type 2, and having trouble with it the last week or so. I
haven't seen a sugar reading under 122 in about that long, including at
the end of about 36 hours with no real food, or sweetened drink yesterday.
To see how it works, try this:
touch test1.txt
ln test1.txt test2.txt
echo This is test1. > test1.txt
cat test2.txt
Been there, done that on other os's.
Now try running an editor like KWrite, vi, Joe, or mcedit on one of
the files. Changes you make in one will show up in the other. (There
are more editors you could use, I just listed a few...)
You may want run ls -l on one of the ifcfg-eth0 files, and see if
there are still 3 links. If not, it may break some utilities.
There are 3 yet.
[root@diablo ~]# ls -l `locate ifcfg-wlan0`
-rw-r--r-- 3 root root 303 May 22 21:34
/etc/sysconfig/networking/devices/ifcfg-wlan0
-rw-r--r-- 3 root root 303 May 22 21:34
/etc/sysconfig/networking/profiles/default/ifcfg-wlan0
-rw-r--r-- 3 root root 303 May 22 21:34
/etc/sysconfig/network-scripts/ifcfg-wlan0
And I STILL fail to see the point of all this, rather like we have a
committee working on that one script and its support. :-)
Mikkel
Thanks Mikkel.
--
Cheers, Gene
