Have you ever seen this symbol with a friend of a BSD or UNIX system?

Source: Internet
Author: User
Have you ever seen this symbol with a friend of a BSD or UNIX system?
My system is Mac OSX, and I found a strange symbol in the permissions list.
I can't send a picture here, so I'll stick to the text.

drwxr-xr-x+ Angryfrog Staff 1632 11 20 10:49.
Drwxr-xr-x 6 Root Admin 204 10 10 14:54..
-RW-------1 Angryfrog Staff 5 2 10 2012. Cfusertextencoding
-rw-r--r--@ 1 Angryfrog Staff 24580 11 17 03:51. Ds_store
DRWX------2 Angryfrog Staff 68 11 20 10:49. Trash
-RW-------1 Angryfrog staff 0 10 11 15:32. Xauthority
Drwxr-xr-x 4 Angryfrog Staff 136 2. Adobe
-RW-------1 Angryfrog staff 8706 03:05. bash_history

Please look at line fourth,-rw-r--r--@, and finally there is a "@", this symbol I have not found on CentOS. I don't expect any of the other Linux.
Because the Mac OS kernel Darwin is based on the FreeBSD kernel OpenBSD, I would like to ask if anyone knows the meaning of this symbol. I did not get the answer in the BSD version of CU. Also asked in the Unix district of Csdn. But they didn't get the answer. I'm even a little skeptical now that this is a peculiar symbol of Darwin.

Ignorant, if you know, please tell the meaning, I also pondered for a long time, but really do not see what the meaning.
------Optimal Solution--------------------
Yesterday checked for a long time did not find this reason, looked at their own Mac and Linux server, also did not find this symbol, the original is an extra thing ah, study, very grateful to the landlord to publish the answer.
------Other Solutions--------------------
In the UNIX version asked the answer. This property indicates that this file or this directory contains additional attributes. For example, when you download a file on your Mac and double-click Open, you will be prompted, such as "This file from the network download is not secure," such as the identity from this extra property, can be viewed with the xattr-l command.

The extra property is not unique to the Mac, except Ls-al, [email protected]

To pack files from a Mac to copy to Linux, this property will cause Linux to fail to open, which is the property mischief. So it takes tar-x to get rid of this attribute to Linux when packaging from a Mac.

Do not knot the paste, let's give you a wake up
------Other Solutions--------------------
The reply was deleted by the administrator in 2012-11-21 11:40:08
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