PRVF-0002: could not retrieve local node name (12c)

While installation of Oracle 12c

Installer could not start

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PRVF-0002: could not retrieve local node name

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Log file shows:

---# Begin Stacktrace #---------------------------
ID: oracle.install.commons.util.exception.AbstractErrorAdvisor:39
oracle.cluster.verification.VerificationException: PRVF-0002 : could not retrieve local node name
        at oracle.cluster.verification.ClusterVerification.setParamManagerLocalHost(ClusterVerification.java:639)
        at oracle.cluster.verification.ClusterVerification.getInstance(ClusterVerification.java:561)
        at oracle.install.driver.oui.OUIInstallDriver.load(OUIInstallDriver.java:473)
        at oracle.install.ivw.db.driver.DBSetupDriver.load(DBSetupDriver.java:289)
        at oracle.install.commons.base.driver.common.Installer.run(Installer.java:516)
        at oracle.install.ivw.common.util.OracleInstaller.run(OracleInstaller.java:133)
        at oracle.install.ivw.db.driver.DBInstaller.run(DBInstaller.java:139)
        at oracle.install.commons.util.Application.startup(Application.java:1072)
        at oracle.install.commons.flow.FlowApplication.startup(FlowApplication.java:181)
        at oracle.install.commons.flow.FlowApplication.startup(FlowApplication.java:198)
        at oracle.install.commons.base.driver.common.Installer.startup(Installer.java:566)
        at oracle.install.ivw.db.driver.DBInstaller.startup(DBInstaller.java:127)
        at oracle.install.ivw.db.driver.DBInstaller.main(DBInstaller.java:165)

---# End Stacktrace #-----------------------------

Diagnostics:

First check:

type 

$ hostname -f

If you get 

[root@agileplm ~]# hostname -f
hostname: Unknown host

Check /etc/resolv.conf 

check /etc/sysconfig/network

Correct the entries at the file. 

Second:

Check the /etc/hosts file for proper entries.

Restart the Installer.