On 11/30/10, Tony Schreiner <tony.schreiner at bc.edu> wrote: > That error would happen if you did not have a space between [ and $? > > Tony Schreiner > Thank you very much for your help. Actually, I didn't have got a clear understanding of your code. Sorry for my mis-understanding. At now, I analyzed the code and totally understand it. I corrected my mistake in typing the command but still receiving the following error: '-bash: $LOGFILE: ambiguous redirect' Can you please do me favor and correct me on my mistake? Please be informed that I am using centos 5.2