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-rw-r--r--@ 1 abc  staff  1088808  8 31 09:55 marcus_gow

Anyone knows this, what's it for?

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What operating system are you using? – Michael Hampton Aug 31 '12 at 2:37
The "staff" group makes it look like OSX to me. – ceejayoz Aug 31 '12 at 2:41
I'd think the same thing, but he tagged it linux when it's almost certainly not Linux. – Michael Hampton Aug 31 '12 at 2:46
As @abc already seems to got some proper answers, here's my Friday reply: obviously it's "wall rodent worm wall rodent wall wall rodent wall wall Nethack_hero" – Janne Pikkarainen Aug 31 '12 at 9:28
See this question as well. – Alex Aug 31 '12 at 9:34

man ls

If the file or directory has extended attributes, the permissions field printed by the -l option is followed by a '@' character.

ls -l@ /path/to/marcus_gow
xattr -l /path/to/marcus_gow
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It means that the files has extended attributes.

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