oracle not available ERROR

hi
how can i fix this problem
when i try to log on oracle sql/plus i get that error
i issue a shutdown command and dont know how to start tha database ..is this because i issue shutdown immediate command ...if so how can i start the database oracle

thank again
helppppp

To start the db:
export/set ORACLE_SID=db_name
svrmgrl
connect internal
startup pfile=path_of_init.ora
-
Yes, if the db has been shutdown, you will not be able to connect to the db. Start it up and then try to connect using SQL*Plus.