>file
this redirects the output into a file.
but if the out of the line is more then, the extra length will not be visible in the 'file'. so to see the extra lenth of a line in a new line u give
>file 2>&1
ex:-
>file
this is outp
this not av
>file 2>&1
this is outp
ut
this not av
aialbe..
here u can see both the difference ;)