"rkmr.em@gmail.com" <rkmr.em@gmail.com> writes:
> is there anyway of specifying password in the command line interface
> of pg_dumpall??
No, and you wouldn't want to use it if there was (hint: putting a
password on a command line is insecure).
The recommended procedure to avoid a lot of password prompts is to
set up a ~/.pgpass file:
http://www.postgresql.org/docs/8.2/static/libpq-pgpass.html
regards, tom lane