I got the command :
istat filename

But
i want to know, who has accessed the file last time.
As istat shows the name of owner of that file and name of the group.

istat does lots of my work but i want to know who has accessed my file last time as there could be 'n' no. of users of that file in a group.

Hope you got this !!
Please help me, ASAP !!

Thnaks !!