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Cheulong Sear
Cheulong Sear

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Basic Linux command (Hostname)

#linux #server #homelab #ubuntu

Hostname is used to display the system's DNS name, and to display or set its hostname or NIS domain name.

Hostname help you:

  • recognize machine
  • know when run commands against the machine 
# to show the name of your computer
hostname

----
master-node
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Hostname is stored in /etc/hostname

cat /etc/hostname

----
master-node
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Hostname need to be existed in /etc/hosts as well.

Other commands 

hostname -f # full name
hostname -I # show the machine IP on the system
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hostnamectl

----
Static hostname: master-node
...
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Change hostname 

sudo hostnamectl set-hostname <new-hostname>

# update hosts
sudo nano /etc/hosts

----
127.0.0.1 localhost
127.0.1.1 <new-hostname> <shorten-version>
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