Change a Linux Device Hostname (and make it stick)

• Updated Sep 1, 2025 • Rasim Mahmudov • 1 min read • 6 views

Temporary change

sudo hostnamectl set-hostname my-node-01

Permanent files

Edit two files:

sudo nano /etc/hostname
# replace the name

sudo nano /etc/hosts
127.0.1.1 my-node-01

Apply and verify

sudo systemctl restart systemd-hostnamed
hostname

Conclusion

A unique hostname avoids conflicts in Kubernetes and SSH. Always reboot or restart services to apply it fully.

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