* Oracle Patch download link
 {{{
https://updates.oracle.com/Orion/PatchDetails/process_form?patch_num=<patch ID>
}}}

 * RAC
  * Start/stop
  {{{
Start a rac database (order: nodeapps – asm – database)

srvctl start nodeapps -n nodename
srvctl start asm -n nodename
srvctl start database -d dbname
options are: srvctl start database -d dbname -o open | -o mount | -o nomount

Stop a rac database (order: database – asm – nodeapps)
srvctl stop database -d dbname -o immediate
options are: srvctl stop database -d dbname -o normal | -o transactional | -o immediate | -o abort

srvctl stop asm -n nodename
options are: srvctl stop asm -n nodename -o immediate

srvctl stop nodeapps -n nodename

To check status and configurations
Nodeapps:
srvctl status nodeapps -n nodename

srvctl config nodeapps -n nodename

ASM:
srvctl status asm -n nodename
srvctl config asm -n nodename

Database:
srvctl status database -d dbname
srvctl config database -d dbname (shows instances name, node and oracle home)

Instance:
srvctl status instance -d dbname -i instancename

Services:
srvctl status service -d dbname

To start and stop instances

srvctl start instance -d dbname -i instancename
srvctl stop instance -d dbname -i instancename

To start, stop and manage services
srvctl status service -d dbname
srvctl config service -d dbname
srvctl start service -d dbname -s servicename
srvctl stop service -d dbname -s servicename

srvctl relocate service -d dbname -s servicename -i instancename -t newinstancename [-f]
}}}