If you are working with tools that genegates logfiles it is handy to have the name of the logfile based on the date. The following command will help us create a filename based on the system date. The command takes the date, puts it in MMDDYYYY format and appends the .LOG extension. The date with the .LOG extension is assigned to a variable named datefile. For example, today, on July 27, 2007 the datefile variable would contain: 07272007.LOG

The command for setting up the datefile variable is:

for /F “tokens=2,3,4 delims=/ ” %%i in (‘date /t’) do set datefile=%%i%%j%%k.log

If you want to view the contents of the datefile variable, you can do so by using the echo command. Since datefile is a variable, you must place percentage signs on each end of it any time you reference it. For example, the command for viewing the contents of this variable would be:

Echo %datefile%

But we’re not interested in merely viewing the contents of the datefile variable. Our goal is to use the variable’s contents as a filename, and to export eg. the CHKDSK results to the file that is referenced by the datefile variable. To do so, use this command:

Chkdsk > %datefile%

The batch file in its entirety would look like this:

for /F “tokens=2,3,4 delims=/ ” %%i in (‘date /t’) do set datefile=%%i%%j%%k.log Chkdsk > %datefile%