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I've had a problem with my system time, when I execute the following:
date && touch test && stat test

I get this result:

Sun Jan 22 17:52:07 MSK 2012
File: test
Size: 0 Blocks: 0 IO Block: 4096 regular empty file
Device: 1dh/29d Inode: 5543372 Links: 1
Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root)
Access: 2012-01-22 17:19:39.000000000 +0400
Modify: 2012-01-22 17:19:39.000000000 +0400
Change: 2012-01-22 17:19:39.000000000 +0400

This causes my imap server to give me an error upon login, namely
* BYE Clock skew detected. Check the clock on the file server

I tried to solve this using ntpdate and ntpd daemon, but though neither give me an error, the situation does not change. I tried ubuntu forums but nobody seems to know what to do. I would appreciate any help I could get.

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There is only one explanation why the time reported by date and the timestamp on a touched file would differ: the file you are touching is located on and NFS server and the server's time doesn't match the client's.

Check the time on the NFS server.

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