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/bin/bash is the best........no doubt.

what i do is:
ls -R > allfiles
it stores all filenames in directory wise in a file; named allfiles.
then
grep myfile from allfiles.
this is the fastest way that i know if you have to search...

try
grep -- "/pb"
or use fgrep.

can anybody let me know how can i search for "-n" in a text file; or if my file name is "-n" (which is legal in Unix) how do i deal with that?
thanks

use if []; then .....else......
use the exit status of grep as condition
grep exits with 0 if the string is found, 1 if not found and 2 if the file is not there.
then use > to redirect your output...