Change Hostname on Linux




  • Hostnames are used to indentify the machine name in Linux system.
  • Networking is working better with the names not the IP address (numbers). So hostname is also very important in your system.
  • Hostnames composed 2 parts: one is machine name and one is domain name.
  • When you configure one Linux Server, you need know its hostname. This will be assigned by network administrator and will be a machine in your company domain. If your network is using DHCP, it may or may not assgin your system a hostname automatically.
  • Use command uname -a to see the hostname , domain names, architecture and kernel version of your Linux System.
[root@localhost ~]# uname -a
Linux localhost.localdomain 2.6.32-358.2.1.el6.x86_64 #1 SMP Wed Mar 13 00:26:49 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
[root@localhost ~]#

1. Change Hostname on Linux Redhat RHEL System

1a. Redhat 6.3 RHEL


2. Change Hostname on Linux Centos Fedora System

2a. Centos 6.3


3. Change Hostname on Linux Ubuntu Debian System

3a. Ubuntu 12


4. Change Hostname on Linux System without reboot


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