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I need to get detailed information of certain file or folder;

  • File chmod changed date, which user?

How can i do this?

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Are you looking for audit information for the file? It's not exactly clear to me what you are looking for. –  Brent Pabst Jan 9 '13 at 15:42
You might give ls -al or stat <filename> a try –  John K Jan 9 '13 at 15:47
Either you have to audit it or stat it when you want. –  Soham Chakraborty Jan 9 '13 at 15:51
I think stat reports more info about file for my needs. –  WishtobeNothing Jan 9 '13 at 15:59
Do you want to know about something that has already happened or are you looking to set something up to start monitoring files? Do you want to do this for a single file a directory or what ? –  Iain Jan 10 '13 at 6:57

2 Answers 2

You can try to use inotifywait

Try like this:

inotifywait -e attrib -m the_folder_to_watch

Where -e is the event to monitor, -m is monitor continuously.

See the blogpost here: http://en.positon.org/post/A-solution-to-the-umask-problem%3A-inotify-to-force-permissions

And the man for inotifywait: http://linux.die.net/man/1/inotifywait

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There is no way to do this (that I know of, I could be corrected and learn something as well) unless you've installed a package to handle this. Meaning, if you didn't plan ahead and monitor a file, there is no way to get this information. All you'll be able to get from the file is the basic information that the stat <filename> cmd shows you, which wont show you what user altered a file.

That being said, in the future there are packages like audit that help you handle this and after you set a file to be audited, a simple ausearch -f <filename> would allow you to see this type of information. You could also use something like aide -- which I personally like.

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