Home Directory for oracle user

Hello all,

I am Installing Oracle 11g on my Solaris OS.

I created the below oracle user:

# /usr/sbin/useradd -g oinstall -G dba oracle

but when i am trying to to su - oracle it give me the below error
No directory

Do i have to setup a home directory for oracle user? and how can i do that ?

read the "useradd" manpage...