title: how to get ubuntu file timestamp in millisecond
body: <p>Linux friends, how do you guys get a file timestamp in the resolution of milliseconds in Ubuntu? When I tried the command "stat" on my system, I get:</p>
  
  <pre><code> File: `tmp.dat'
    Size: 14              Blocks: 8          IO Block: 4096   regular file
  Device: 811h/2065d      Inode: 13895454    Links: 1
  Access: (0644/-rw-r--r--)  Uid: ( 1000/    yqin)   Gid: ( 1004/     dev)
  Access: 2010-09-27 09:04:44.000000000 -0400
  Modify: 2010-09-25 13:54:58.000000000 -0400
  Change: 2010-09-25 13:54:58.000000000 -0400
  </code></pre>
  
  <p>It seems that the resolution is only up to second. Any ideas? Thanks a lot.</p>