PRVF-0002 : Could not retrieve local nodename

When I install Oracle DB 12cR1 on Oracle Linux 6, I encountered this error: "PRVF-0002 : Could not retrieve local nodename"

When you check the hostname it is correct, but somehow I still received this error message.

What you need to do:
1. check your hostname
      on linux type in: hostname
      Take note the hostname output. For this blog purpose, I use mydb12c for my hostname.
2. amend /etc/hosts
      vi /etc/hosts
      add in your local nodename
      before
      27.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
      ::1        localhost localhost.localdomain localhost6 localhost6.localdomain6

      after
      27.0.0.1   mydb12c mydb12c.local localhost localhost.localdomain localhost4 localhost4.localdomain4

      ::1         mydb12c mydb12c.local localhost localhost.localdomain localhost6 localhost6.localdomain6

And now it runs smoothly. Yippieeee

Side note, in the event you want to change your hostname, you can change in this file "/etc/sysconfig/network":

vi /etc/sysconfig/network

change the HOSTNAME to your desire name

System need to be rebooted.