How to start main services

See Start and stop database, Automate database Startup/Shutdown

Oracle 10g

Enterprise Agent
emctl start agent

emctl start dbconsole
emctl stop dbconsole
start iasconsole
start oms

ocssd(necessary only for RAC adn ASM)
stop it as root using:
/etc/init.d/init.cssd stop
prevent it from running again commenting out in /etc/inittab
h1:35:respawn:/etc/init.d/init.cssd run >/dev/null 2>&1 </dev/null

opmnctl(AS)
start (Start only opmctl process)
start all (Start opmctl process, and opmctl enabled processes)
status -l

ocactl
start (Start OCA process)

Oracle 9i

oemapp console: Enterprise Manager (remember default pwd when connecting to OMS is sysman/oem_temp)

emca: Enterprise Manager Configuration Assistant (Administer OMS and Create an OEM Repository)

oemctl start oms: Management Server 

    oemctl ping oms 

    oemctl status oms (if X running ask prompt on X also if from onother shell!) 

    oemctl status oms sysman/pwd or oemctl status oms sysman/pwd@localhost 

    oemctl stop oms sysman/pwd or oemctl stop oms sysman/pwd@localhost 

oemctl start paging

agentctl start agent: Intelligent Agent 

    agentctl stop agent 

    agentctl status agent 

    agentctl restart agent 

netca: Net Configuration Assistant 

netmgr: Net Configuration Manager 

*****LAUNCH**** 

lsnrctl start 

start instances

agentctl start agent

oemctl start oms