The Oracle support scripts primarily perform steps such as creating appropriate Oracle users, defining shared memory, and creating and semaphore settings. These scripts are contained in the OraSpt component. The support scripts are installed when you install the single-instance software.
The OraSpt component creates one OS user and two OS groups:
User: oracle
Group: oinstall
Group: dba
If a group exists in NIS or LDAP, the support scripts append “n1” to the group name. Thus, if a group dba exists, the plug-in creates a user n1dba.