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CentOS how to change hostname?

Today I needed to change the hostname of my virtual guest machine running CentOS.

  • Login with putty.exe
  • Goto /etc/sysconfig/
  • Type vi network
  • Press i on the keyboard and change the HOSTNAME to your preferred servername
  • Press ESC on the keybord
  • Save the configuration by :wq!
  • Reboot

2007-11-21_154313.png

That’s all!

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This entry was posted on Wednesday, November 21st, 2007 at 4:41 pm and is filed under CentOS. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

9 Responses to “CentOS how to change hostname?”

  1. Umarzuki says:
    September 11, 2008 at 1:43 am

    # system-config-network

    and change hostname under DNS tab, logout then login again would do also.

  2. tijn says:
    February 4, 2009 at 4:24 pm

    You don’t need to reboot, just logout and login.

  3. TheBigK says:
    March 26, 2009 at 7:24 pm

    echo “newhostname” > /proc/sys/kernel/hostname and you dont need to reboot. Reboot is just for new kernel ;D

  4. Pierluigi Vernetto says:
    June 11, 2009 at 12:18 pm

    I have changed hostname, on a CentOS 5.3 on VMWare player, but after the change the startup becomes extremely slow, even opening Terminal takes 30s…. I have made sure the entry in the DNS tab in system-config-network is correct, and restarted…. if I restore the previous hostname value (bagvapp) the respose times become normal again…
    anybody experiencing the same problem?

  5. Pierluigi Vernetto says:
    June 11, 2009 at 12:26 pm

    ah ok I forgot to add the new hostname in the 127.0.0.1 entry in the hosts file…
    the procedure is described here:
    http://javamonamour.blogspot.com/2009/06/centos-change-hostname-and-ips.html

  6. nick says:
    December 3, 2009 at 5:47 am

    /etc/init.d/network restart will do after change the hostname. :)

  7. Bob says:
    December 21, 2009 at 12:36 pm

    And you can also type as root in console: “setup” and then go to “Network Configuration” and edit the DNS config.

    And you may want to check your /etc/hosts

  8. claudio says:
    February 17, 2010 at 5:40 pm

    Thanks guys, but the TheBigK’s solution don’t persist before restart.
    The Umarzuki and Bob solutions are OK.
    Muchas gracias, Thank to all.
    Sorry for my bad english.

  9. claudio says:
    February 17, 2010 at 5:43 pm

    don’t persist “after” restart… is the correct form…
    Sorry again.
    Good luck.

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