Thannks kamitsin and Waseem.

Kamitsin, yours offer recursive solution and yes, i will use mv to achieve the rest.

I need small addon to my requirement (sorry, i did not mention earlier) that LEADING and TRAILING spaces should be removed (not to be replaced with HYPHEN). In other words, file/dir names should not start/end with HYPHENS e.g. if a file with name
" m n " to become "m-n".

Txs
Prvn