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How do I rename the RedHat7 hostname without a reboot? I am also trying to automate this task.

  • I tried the solution below and it just worked great on my Debian Jessie :). – ivanleoncz Nov 14 '18 at 23:10
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[root@stephan ~]# echo stephan2 > /etc/hostname # this is the file that your system reads on boot, to determine the hostname
[root@stephan ~]# sed -i s/stephan/stephan2/g /etc/hosts # many networking headaches will ensue if this isn't updated
[root@stephan ~]# hostname -F /etc/hostname # reread the hostname file to update the systems hostname.

Your prompt will continue to display the old hostname until you log out of it and back in, or execute a new shell session.

[root@stephan ~]# logout
[stephan@stephan ~]$ sudo su -
Last login: Wed Sep 28 18:06:35 EDT 2016 on pts/0
[root@stephan2 ~]#
  • what is "s/stephan/stephan2/g"? Thanks. – tset Sep 29 '16 at 0:06
  • 'sed' is the stream text editor. It's a command that changes text in place, either from a stream of text you 'pipe' into it, or occurrences of that text in a file. en.wikipedia.org/wiki/Sed – Stephan Sep 29 '16 at 18:00
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Use the following command to change the hostname on RHEL7:

hostnamectl set-hostname name

To view current hostnames:

hostnamectl status

Refer to the Red Hat Enterprise Linux Networking guide for further details.

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