The Pakistani Spectator

Following are the steps to change the hostname of the server where Oracle database 11g is installed on Linux platform.

1. Edit the following file as root:
/etc/sysconfig/network
# cat /etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=yes
HOSTNAME=oracle.com

to

# cat /etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=yes
HOSTNAME=oracle-new.com

Change the line below to match the new hostname/domain name:
HOSTNAME=<hostname>.<domain_name> ( eg: ora2-new.oracle-new.com )

Save the file

2. Edit the ‘/etc/hosts’ file as root to ensure that it contains the new hostname and/or domain name.
# 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
::1 localhost6.localdomain6 localhost6
192.168.78.110 ora2.oracle.com ora2

to
# 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
::1 localhost6.localdomain6 localhost6
192.168.78.110 ora2-new.oracle-new.com ora2-new

make sure you have configured other services for the new hostname and/or domain name ( eg: h
ttpd )

3. Restart the O/S
# reboot

4. Verify that you can ping the host from another host in your network. Be sure to ping using the new hostname to make sure
everything is resolving properly.
# ping ora2-new.oracle-new.com
PING ora2-new.oracle-new.com (192.168.78.110) 56(84) bytes of data.
64 bytes from ora1 (192.168.78.110): icmp_seq=1 ttl=64 time=4.27 ms
64 bytes from ora1 (192.168.78.110): icmp_seq=2 ttl=64 time=0.165 ms
64 bytes from ora1 (192.168.78.110): icmp_seq=3 ttl=64 time=0.186 ms
64 bytes from ora1 (192.168.78.110): icmp_seq=4 ttl=64 time=0.151 ms

— ora2-new.oracle-new.com ping statistics —
4 packets transmitted, 4 received, 0% packet loss, time 2999ms
rtt min/avg/max/mdev = 0.151/1.194/4.274/1.778 ms