where is the recently accessed file list stored

Hakan Koseoglu hakan at koseoglu.org
Tue Jul 20 07:25:40 UTC 2010


Yu,

2010/7/20 yu huang <hybryant at hotmail.com>:
> I want to have a menu item in places where records the recent accessed
> directory.
> I am wondering where is the recent accessed document list stored in ubuntu?
> How does ubuntu track the recently accessed file?

Unless turned off, access time for each file is stored on disk. For
performance reasons this can be turned off but it is not done by
default on Ubuntu.

You can use atime option on many commands.

ls -la --time=atime

will show the last access time for all files in that directory.

Similarly you can search for a file modified at a particular date or
older/newer than a certain date using the find command:
These are the options in the command "find" you might find useful:

       -daystart
              Measure times (for -amin, -atime, -cmin, -ctime, -mmin,
and -mtime) from the beginning of today rather than from  24  hours
ago.   This  option  only
              affects tests which appear later on the command line.

   -atime n
              File was last accessed n*24 hours ago.  When find
figures out how many 24-hour periods ago the file was last accessed,
any fractional part is ignored,
              so to match -atime +1, a file has to have been accessed
at least two days ago.

       -cmin n
              File's status was last changed n minutes ago.

       -cnewer file
              File's status was last changed more recently than file
was modified.  If file is a symbolic link and the -H option or the -L
option is in effect,  the
              status-change time of the file it points to is always used.

       -ctime n
              File's  status  was  last  changed  n*24  hours ago.
See the comments for -atime to understand how rounding affects the
interpretation of file status
              change times.


       -mtime n
              File's data was last modified n*24 hours ago.  See the
comments for -atime to understand how rounding affects the
interpretation of file  modification
              times.

       -mmin n
              File's data was last modified n minutes ago.

-- 
Hakan (m1fcj) - http://www.hititgunesi.org




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