Indent output of an UNIX command

Hi,

How do I indent 4 spaces for standard UNIX commands like ls -ltr (or grep)?
For example, I want ls -ltra to output as:

<<spaces here>>-rw-r----- 1 a345696 rtkdevel 455 Dec 6 14:52 file1
<<spaces here>>-rw-r----- 1 a345696 rtkdevel 455 Dec 6 14:52 file2
<<spaces here>>-rw-r----- 1 a345696 rtkdevel 455 Dec 6 14:52 file3

instead of:

-rw-r----- 1 a345696 rtkdevel 455 Dec 6 14:52 file1
-rw-r----- 1 a345696 rtkdevel 455 Dec 6 14:52 file2
-rw-r----- 1 a345696 rtkdevel 455 Dec 6 14:52 file3

I tried to do it with a functions which indents it's argument, but it did only for the last line of the output.

Any clues?

Thanks in Advance,
Suddha Satta Ray

my_command_here | sed 's/^/ /'

Cheers
Zb

Thanks!!
Works perfectly!!