Output Redirection from the Windows Command Line
This tip will show you how to write the output of a command at the Windows command line to a file. It's not hard (infact it's one of the very basics of command line programming).
Start Command Line within Windows by choosing Start->Run then entering 'cmd' and pressing enter.
Suppose you want to capture the output from a directory listing, say c:\blah. To get the directory listing to display on the screen you would type the command dir c:\blah which may generate the output:
C:\>dir c:\blah
Volume in drive C is Windows
Volume Serial Number is XXXX-YYYY
Directory of c:\blah
07/01/2006 21:08 <DIR> .
07/01/2006 21:08 <DIR> ..
07/01/2006 21:07 <DIR> folder1
07/01/2006 21:07 <DIR> folder2
06/03/2005 11:58 5,442,634 music.mp3
07/01/2006 21:07 17 text1.txt
2 File(s) 5,442,651 bytes
4 Dir(s) 12,453,460,480 bytes free
If you want to capture this listing to the file c:\folder.txt then you would append > c:\folder.txt to the original command, ie:
C:\>dir c:\blah > c:\folder.txt
Notice now that nothing appears on the command line window after this and it simply moves on to the next prompt. If we now check the file c:\folder.txt then we see that it has the contents of the directory.
A slight variant of this is to use the greater than symbol, >, twice, ie:
C:\>dir c:\blah >> c:\folder.txt
This will append the output of the dir command to what is already contained in the file c:\folder.txt.
