Oracle 9i use C/S console, while Oracle 10g use B/S console.

Oracle 9i

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DB start and console start:

$lsnrctl start

$dbstart

./oemapp dbastudio

oracle 10g:

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DB start and console start:

1. Navigate into your $ORACLE_HOME/bin directory

2. Issue the following statement:

$lsnrctl start

$dbstart

$./emctl start dbconsole

http://host.domain:5500/em

Starting iSQL*Plus

$isqlplusctl start

http://host.domain:5560/isqlplus