> The user could also be running the command inline somehow or deleting the 
> file when they log off.  

"wiretapping" your SSHd is one way to find out what people are up to

http://forums.devshed.com/bsd-help-31/logging-ssh-shell-sessions-30398.html

Also .. if you have the resources, a passive tap and another box that
has enough disk and I/O to keep up is useful to see who was doing what
right before the packetstorm happens.

If you can take the box offline and grab a disk image, tools like "fls"
from TSK can generate a filesystem timeline, again .. who touched what
right before it started...

Cheers,

Michael Holstein
Cleveland State University

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