How to remove the milliseconds from timestamps with sed?

Question

My input file is as follows:

12/13/2011,07:14:13.724,12/13/2011 07:14:13.724,231.56.3.245,LasVegas,US

I wish to get the following:

<         


        

Answer 1

Try:

sed 's,\(:[0-9]\{2\}\).[0-9]\{3\},\1,g'

Also, try \d instead of [0-9], your version of sed may support that.