Search notes:

$ORACLE_HOME/runInstaller

Apparently, an earlier name of this script was dbSetup.sh: 
$ sed -n '/NAME/{n;p;q;}' $ORACLE_HOME/runInstaller
#      dbSetup.sh

Starting the Database Setup Wizard

$ cd $ORACLE_HOME
$ ./runInstaller

Install Release Updates

$ ./runInstaller -applyRU $patchDir

See also

Database Installation
$ORACLE_HOME/oui/bin/runInstaller
$ORACLE_HOME/setup[.exe]

Index