Is anyone familiar with the -nt condition of the if statment in Unix scripting (ie. if [[ file1 -nt file2 ]] ). Where can I find more information on it. It was used in an old script and I need to ensure what it is doing is what we think it is doing. In fact I almost believe it has limitations. It looks like it is being used to compare two files timestamps, however the limitation I am finding is it may not be able to compare files that are to close in milliseconds with their time stamps. Any thoughts, opinions or locations to find info on this would be truly appreciated. - Thanks!