Hi I've got a file /opt/development/index.html that I serve. The problem I'm having is that some other process is touching/locking this file at random intervals. Now this mystery process seems to only last for less than a second. So my dilemma is how do I capture what it is given the short space of time the process acts upon the file. What tools are available. I've tried to use watch lsof /opt/development/index.html with an interval of 1 sec refresh, but I still can't see the process. Any ideas? Thanks in advance Dan