In some case, you should need to change your existing hostname on your Linux operating system.

In this post, I try to explain how you can do it on Linux operating system.

First I need to edit some files(you can use vi editors or vim) then you need to reboot your system to can change your hostname permanently.

Here are the steps:

1. /etc/hosts

2. /etc/sysconfig/network

3. /etc/sysconfig/network-scripts/ifcfg-eth0 (depends on NIC name)

then reboot.

Ps: If you have Oracle E-Business Suite and if you want to change hostname you need to follow below metalink documents:

How to change the hostname and/or port of the Database Tier using AutoConfig [ID 338003.1]
How to change the hostname of an Applications Tier using AutoConfig [ID 341322.1]

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