Oracle 11gR2 netca fails to start and reports an error caused by default Host Name

/U01/Oracle/bin/netca: line 178: 11819 Aborted $ JRE $ JRE_OPTIONS-classpath $ CLASSPATH oracle.net. ca. NetCA $ *

It is caused by the default host name. Modify the Host Name

Oracle@www.bkjia.com ~ $ Cat/etc/sysconfig/network

NETWORKING = yes

HOSTNAME = hotDB11g

GATEWAY = 192.168.1.1

Oracle@www.bkjia.com ~ $ Cat/etc/hosts

# Do not remove the following line, or various programs

# That require network functionality will fail.

127.0.0.1 localhost. localdomain localhost hotDB11g

Run again

Hostname hotDB11g

Enable oracle users to log out and log on again to start netca.